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• Saving/Associating slider values with a pop-up menu

  - by James

  Hi, Following on from a question I posted yesterday about GUIs, I have another problem I've been working with. This question related to calculating the bending moment on a beam under different loading conditions. On the GUI I have developed so far, I have a number of sliders (which now work properly) and a pop-up menu which defines the load case. I would like to be able to select the load case from the pop-up menu and position the loads as appropriate, in order to define each load case in turn. The output that I need is an array defining the load case number (the rows) and a number of loading parameters (the itensity and position of the loads, which are controlled by the sliders). The problem I am having is that I can produce this array (of the size I need) and define the loading for one load case (by selecting the pop-up menu) using the sliders, but when I change the popup menu again, the array only keeps the loading for the load case selected by the pop-up menu. Can anyone suggest an approach I can take with (specifically to store the variables from each load case) or an example that illustrates a similar solution to the problem? The probem may be a bit vague, so please let me know if anything needs clearing up. Many Thanks, James

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• Keyword to SQL search

  - by jdelator

  Use Case When a user goes to my website, they will be confronted with a search box much like SO. They can search for results using plan text. ".net questions", "closed questions", ".net and java", etc.. The search will function a bit different that SO, in that it will try to as much as possible of the schema of the database rather than a straight fulltext search. So ".net questions" will only search for .net questions as opposed to .net answers (probably not applicable to SO case, just an example here), "closed questions" will return questions that are closed, ".net and java" questions will return questions that relate to .net and java and nothing else. Problem I'm not too familiar with the words but I basically want to do a keyword to SQL driven search. I know the schema of the database and I also can datamine the database. I want to know any current approaches there that existing out already before I try to implement this. I guess this question is for what is a good design for the stated problem. Proposed My proposed solution so far looks something like this Clean the input. Just remove any special characters Parse the input into chunks of data. Break an input of "c# java" into c# and java Also handle the special cases like "'c# java' questions" into 'c# java' and "questions". Build a tree out of the input Bind the data into metadata. So convert stuff like closed questions and relate it to the isclosed column of a table. Convert the tree into a sql query. Thoughts/suggestions/links?

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• Migrating to web application with AjaxControlToolkit

  - by Chris

  Hi All, We are currently migrating our ASP.NET website to a web application in Visual Studio 2008. Most of the process has been fairly straight forward, but I have hit one block that is driving me a bit nuts. We are using the AjaxControlToolkit for some functionality, specifically an AutoControlExtender. When this is run locally through VS's development server the extender (dropdown) does not render after the service returns the resultset. However if I deploy the migrated solution to our UAT server the extender functions correctly. I have ensured the Ajax Control Toolkit is properly installed locally on my dev machine (and the dll available in the bin directory), and using debugging have ensured the service is called correctly and runs through without error (which it does). The web application was taken from a server running IIS7. Can anyone confirm if Visual Studio 2008 development server requires a different configuration to IIS 7 (as I believe IIS 6 requires a different configuration to IIS 7), and if there is a resource that provides more info? My own searches have turned up very little in this area. On the other hand, if I am looking in the wrong area any other tips would be appreciated. Thanks Chris

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• Pagination in Joomla!

  Hi every one. I'm a bit new to Joomla! and I'm building my new web site using Joomla! 1.5.8 with a template bought from RocketTheme. The long article in question is a gallery of photos, and I wanted to create a horizontal pagination nav-bar in the footer of the gallery, I just clicked pagebreak where I wanted to paginate in my article in the WYSIWYG editor and thought that it's actually all I have to do. What I got was ugly; a vertically directed navigation bar placed in the top right side of my gallery with the links to each part of the article, the all without the minimum styling. And as I see it's a table! Why not outputting a list instead of a table! (Well this is not actually my concern right now). I can understand CSS and html, but I'm not really a PHP guy, so I don't understand how to use pagination.php or pagenavigation.php! Do I have to customize one of them to have my nav-bar? What I have to do to get that horizontal nav-bar? Really thanks in advance. Wassim

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• Are web-safe colors still relevant?

  - by Gavin Miller

  Since the vast majority of monitors are 16-bit color or more, including mobile devices, does it make sense to even consider web-safe colors when choosing color schemes? Or is it something that ought to be relegated to history as a piece of trivia? For those of you that don't know what web-safe colors are: Another set of 216 color values is commonly considered to be the "web-safe" color palette, developed at a time when many computer displays were only capable of displaying 256 colors. A set of colors was needed that could be shown without dithering on 256-color displays; the number 216 was chosen partly because computer operating systems customarily reserved sixteen to twenty colors for their own use; it was also selected because it allows exactly six shades each of red, green, and blue (6 × 6 × 6 = 216). The list of colors is often presented as if it has special properties that render them immune to dithering. In fact, on 256-color displays applications can set a palette of any selection of colors that they choose, dithering the rest. These colors were chosen specifically because they matched the palettes selected by the then leading browser applications. [Wikipedia]

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• touchesBegin & touchesMove Xcode Obj C Question

  - by AndrewDK

  So I have my app working good when you press and drag along. I also have UIButtons set to Touch Down in Interface Builder. As well when you drag you need to drag from the outside of the UIButton. You cannot click on the UIButton and drag to the other. TOUCHES MOVED: Code: -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event touchesForView:self.view] anyObject]; CGPoint location = [touch locationInView:touch.view]; if(CGRectContainsPoint(oneButton.frame, location)) { if (!oneButton.isHighlighted){ [self oneFunction]; [oneButton setHighlighted:YES]; } }else { [oneButton setHighlighted:NO]; } // if(CGRectContainsPoint(twoButton.frame, location)) { if (!twoButton.isHighlighted){ [self twoFunction]; [twoButton setHighlighted:YES]; } }else { [twoButton setHighlighted:NO]; } } TOUCHES BEGAN: Code: - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event touchesForView:self.view] anyObject]; CGPoint location = [touch locationInView:touch.view]; if(CGRectContainsPoint(oneButton.frame, location)) { [self oneFunction]; [oneButton setHighlighted:YES]; } if(CGRectContainsPoint(twoButton.frame, location)) { [self twoFunction]; [twoButton setHighlighted:YES]; } } I want to be able to click on any of the button fire the function & also be able to drag from one button on to the other and fire that function. So basically just being able to click on a button and slide your finger over and activate the other button without having to press and slide from outside of the button. I think I'm close, need a bit of help. Hope thats clear enough. Thanks.

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• How do you invoke a python script inside a jar file using python ?

  - by Trevor

  I'm working on an application that intersperses a bunch of jython and java code. Due to the nature of the program (using wsadmin) we are really restricted to Python 2.1 We currently have a jar containing both java source and .py modules. The code is currently invoked using java, but I'd like to remove this in favor of migrating as much functionality as possible to jython. The problem I have is that I want to either import or execute python modules inside the existing jar file from a calling jython script. I've tried a couple of different ways without success. My directory structure looks like: application.jar |-- com |--example |-- action |-- MyAction.class |-- pre_myAction.py The 1st approach I tried was to do imports from the jar. I added the jar to my sys.path and tried to import the module using both import com.example.action.myAction and import myAction. No success however, even when I put init.py files into the directory at each level. The 2nd approach I tried was to load the resource using the java class. So I wrote the below code: import sys import os import com.example.action.MyAction as MyAction scriptName = str(MyAction.getResource('/com/example/action/myAction.py')) scriptStr = MyAction.getResourceAsStream('/com/example/action/myAction.py') try: print execfile(scriptStr) except: print "failed 1" try: print execfile(scriptName) except: print "failed 2" Both of these failed. I'm at a bit of a loss now as to how I should proceed. Any ideas ? cheers, Trevor

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• Cisco ASA: Allowing and Denying VPN Access based on membership to an AD group

  - by milkandtang

  I have a Cisco ASA 5505 connecting to an Active Directory server for VPN authentication. Usually we'd restrict this to a particular OU, but in this case users which need access are spread across multiple OUs. So, I'd like to use a group to specify which users have remote access. I've created the group and added the users, but I'm having trouble figuring out how to deny users which aren't in that group. Right now, if someone connects they get assigned the correct group policy "companynamera" if they are in that group, so the LDAP mapping is working. However, users who are not in that group still authenticate fine, and their group policy becomes the LDAP path of their first group, i.e. CN=Domain Users,CN=Users,DC=example,DC=com, and then are still allowed access. How do I add a filter so that I can map everything that isn't "companynamera" to no access? Config I'm using (with some stuff such as ACLs and mappings removed, since they are just noise here): gateway# show run : Saved : ASA Version 8.2(1) ! hostname gateway domain-name corp.company-name.com enable password gDZcqZ.aUC9ML0jK encrypted passwd gDZcqZ.aUC9ML0jK encrypted names name 192.168.0.2 dc5 description FTP Server name 192.168.0.5 dc2 description Everything server name 192.168.0.6 dc4 description File Server name 192.168.0.7 ts1 description Light Use Terminal Server name 192.168.0.8 ts2 description Heavy Use Terminal Server name 4.4.4.82 primary-frontier name 5.5.5.26 primary-eschelon name 172.21.18.5 dmz1 description Kerio Mail Server and FTP Server name 4.4.4.84 ts-frontier name 4.4.4.85 vpn-frontier name 5.5.5.28 ts-eschelon name 5.5.5.29 vpn-eschelon name 5.5.5.27 email-eschelon name 4.4.4.83 guest-frontier name 4.4.4.86 email-frontier dns-guard ! interface Vlan1 nameif inside security-level 100 ip address 192.168.0.254 255.255.255.0 ! interface Vlan2 description Frontier FiOS nameif outside security-level 0 ip address primary-frontier 255.255.255.0 ! interface Vlan3 description Eschelon T1 nameif backup security-level 0 ip address primary-eschelon 255.255.255.248 ! interface Vlan4 nameif dmz security-level 50 ip address 172.21.18.254 255.255.255.0 ! interface Vlan5 nameif guest security-level 25 ip address 172.21.19.254 255.255.255.0 ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 switchport access vlan 3 ! interface Ethernet0/2 switchport access vlan 4 ! interface Ethernet0/3 switchport access vlan 5 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! ftp mode passive clock timezone PST -8 clock summer-time PDT recurring dns domain-lookup inside dns server-group DefaultDNS name-server dc2 domain-name corp.company-name.com same-security-traffic permit intra-interface access-list companyname_splitTunnelAcl standard permit 192.168.0.0 255.255.255.0 access-list companyname_splitTunnelAcl standard permit 172.21.18.0 255.255.255.0 access-list inside_nat0_outbound extended permit ip any 172.21.20.0 255.255.255.0 access-list inside_nat0_outbound extended permit ip any 172.21.18.0 255.255.255.0 access-list bypassingnat_dmz extended permit ip 172.21.18.0 255.255.255.0 192.168.0.0 255.255.255.0 pager lines 24 logging enable logging buffer-size 12288 logging buffered warnings logging asdm notifications mtu inside 1500 mtu outside 1500 mtu backup 1500 mtu dmz 1500 mtu guest 1500 ip local pool VPNpool 172.21.20.50-172.21.20.59 mask 255.255.255.0 no failover icmp unreachable rate-limit 1 burst-size 1 no asdm history enable arp timeout 14400 global (outside) 1 interface global (outside) 2 email-frontier global (outside) 3 guest-frontier global (backup) 1 interface global (dmz) 1 interface nat (inside) 0 access-list inside_nat0_outbound nat (inside) 2 dc5 255.255.255.255 nat (inside) 1 192.168.0.0 255.255.255.0 nat (dmz) 0 access-list bypassingnat_dmz nat (dmz) 2 dmz1 255.255.255.255 nat (dmz) 1 172.21.18.0 255.255.255.0 access-group outside_access_in in interface outside access-group dmz_access_in in interface dmz route outside 0.0.0.0 0.0.0.0 4.4.4.1 1 track 1 route backup 0.0.0.0 0.0.0.0 5.5.5.25 254 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute timeout tcp-proxy-reassembly 0:01:00 ldap attribute-map RemoteAccessMap map-name memberOf IETF-Radius-Class map-value memberOf CN=RemoteAccess,CN=Users,DC=corp,DC=company-name,DC=com companynamera dynamic-access-policy-record DfltAccessPolicy aaa-server ActiveDirectory protocol ldap aaa-server ActiveDirectory (inside) host dc2 ldap-base-dn dc=corp,dc=company-name,dc=com ldap-scope subtree ldap-login-password * ldap-login-dn cn=administrator,ou=Admins,dc=corp,dc=company-name,dc=com server-type microsoft aaa-server ADRemoteAccess protocol ldap aaa-server ADRemoteAccess (inside) host dc2 ldap-base-dn dc=corp,dc=company-name,dc=com ldap-scope subtree ldap-login-password * ldap-login-dn cn=administrator,ou=Admins,dc=corp,dc=company-name,dc=com server-type microsoft ldap-attribute-map RemoteAccessMap aaa authentication enable console LOCAL aaa authentication ssh console LOCAL http server enable http 192.168.0.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart sla monitor 123 type echo protocol ipIcmpEcho 4.4.4.1 interface outside num-packets 3 frequency 10 sla monitor schedule 123 life forever start-time now crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 crypto dynamic-map outside_dyn_map 20 set pfs crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-SHA crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map crypto map outside_map interface outside crypto isakmp enable outside crypto isakmp policy 10 authentication pre-share encryption 3des hash sha group 2 lifetime 86400 ! track 1 rtr 123 reachability telnet timeout 5 ssh 192.168.0.0 255.255.255.0 inside ssh timeout 5 ssh version 2 console timeout 0 management-access inside dhcpd auto_config outside ! threat-detection basic-threat threat-detection statistics access-list no threat-detection statistics tcp-intercept webvpn group-policy companynamera internal group-policy companynamera attributes wins-server value 192.168.0.5 dns-server value 192.168.0.5 vpn-tunnel-protocol IPSec password-storage enable split-tunnel-policy tunnelspecified split-tunnel-network-list value companyname_splitTunnelAcl default-domain value corp.company-name.com split-dns value corp.company-name.com group-policy companyname internal group-policy companyname attributes wins-server value 192.168.0.5 dns-server value 192.168.0.5 vpn-tunnel-protocol IPSec password-storage enable split-tunnel-policy tunnelspecified split-tunnel-network-list value companyname_splitTunnelAcl default-domain value corp.company-name.com split-dns value corp.company-name.com username admin password IhpSqtN210ZsNaH. encrypted privilege 15 tunnel-group companyname type remote-access tunnel-group companyname general-attributes address-pool VPNpool authentication-server-group ActiveDirectory LOCAL default-group-policy companyname tunnel-group companyname ipsec-attributes pre-shared-key * tunnel-group companynamera type remote-access tunnel-group companynamera general-attributes address-pool VPNpool authentication-server-group ADRemoteAccess LOCAL default-group-policy companynamera tunnel-group companynamera ipsec-attributes pre-shared-key * ! class-map type inspect ftp match-all ftp-inspection-map class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect ftp ftp-inspection-map parameters class ftp-inspection-map policy-map type inspect dns migrated_dns_map_1 parameters message-length maximum 512 policy-map global_policy class inspection_default inspect dns migrated_dns_map_1 inspect ftp inspect h323 h225 inspect h323 ras inspect http inspect ils inspect netbios inspect rsh inspect rtsp inspect skinny inspect sqlnet inspect sunrpc inspect tftp inspect sip inspect xdmcp inspect icmp inspect icmp error inspect esmtp inspect pptp ! service-policy global_policy global prompt hostname context Cryptochecksum:487525494a81c8176046fec475d17efe : end gateway# Thanks so much!

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• Parameterized Queries /Without/ using queries.

  - by Aren B

  I've got a bit of a poor situation here. I'm stuck working with commerce server, which doesn't do a whole lot of sanitization/parameterization. I'm trying to build up my queries to prevent SQL Injection, however some things like the searches / where clause on the search object need to be built up, and there's no parameterized interface. Basically, I cannot parameterize, however I was hoping to be able to use the same engine to BUILD my query text if possible. Is there a way to do this, aside from writing my own parameterizing engine which will probably still not be as good as parameterized queries? Update: Example The where clause has to be built up as a sql query where clause essentially: CatalogSearch search = /// Create Search object from commerce server search.WhereClause = string.Format("[cy_list_price] > {0} AND [Hide] is not NULL AND [DateOfIntroduction] BETWEEN '{1}' AND '{2}'", 12.99m, DateTime.Now.AddDays(-2), DateTime.Now); *Above Example is how you refine the search, however we've done some testing, this string is NOT SANITIZED. This is where my problem lies, because any of those inputs in the .Format could be user input, and while i can clean up my input from text-boxes easily, I'm going to miss edge cases, it's just the nature of things. I do not have the option here to use a parameterized query because Commerce Server has some insane backwards logic in how it handles the extensible set of fields (schema) & the free-text search words are pre-compiled somewhere. This means I cannot go directly to the sql tables What i'd /love/ to see is something along the lines of: SqlCommand cmd = new SqlCommand("[cy_list_price] > @MinPrice AND [DateOfIntroduction] BETWEEN @StartDate AND @EndDate"); cmd.Parameters.AddWithValue("@MinPrice", 12.99m); cmd.Parameters.AddWithValue("@StartDate", DateTime.Now.AddDays(-2)); cmd.Parameters.AddWithValue("@EndDate", DateTime.Now); CatalogSearch search = /// constructor search.WhereClause = cmd.ToSqlString();

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• Android: How to get a custom view to redraw partially?

  - by Peterdk

  I have a custom view that fills my entire screen. (A piano keyboard) When a user touches the key, it would cause a invalidate() to be called and the whole keyboard gets redrawn to show the new state with a touched key. Currently the view is very simple, but I plan to add a bit more nice graphics. Since the whole keyboard is dynamically rendered this would make redrawing the entire keyboard more expensive. So I thought, let's look into partial redrawing. Now I call invalidate(Rect dirty) with the correct dirty region. I set my onDraw(Canvas canvas) method to only draw the keys in the dirty region if I do indeed want a partial redraw. This results in those keys being drawn, but the rest of the keyboard is totally black/not drawn at all. Am I wrong in expecting that calling invalidate(Rect dirty) would "cache" the current canvas, and only "allows" drawing in the dirty region? Is there any way I can achieve what I want? (A way to "cache" the canvas and only redraw the dirty area?"

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• Objective-C memory model

  - by TofuBeer

  I am attempting to wrap my head around one part of the Objective-C memory model (specifically on the iPhone, so no GC). My background is C/C++/Java, and I am having an issue with the following bit of code (also wondering if I am doing this in an "Objective-C way" or not): - (NSSet *) retrieve { NSMutableSet *set; set = [NSMutableSet new]; // would normally fill the set in here with some data return ([set autorelease]); } - (void) test { NSSet *setA; NSSet *setB; setA = [self retrieve]; setB = [[self retrieve] retain]; [setA release]; [setB release]; } start EDIT Based on comments below, the updated retrieve method: - (NSSet *) retrieve { NSMutableSet *set; set = [[[NSMutableSet alloc] initWithCapacity:100] autorelease]; // would normally fill the set in here with some data return (set); } end EDIT The above code gives a warning for [setA release] "Incorrect decrement of the reference count of an object is not owned at this point by the caller". I though that the "new" set the reference count to 1. Then the "retain" call would add 1, and the "release" call would drop it by 1. Given that wouldn't setA have a reference count of 0 at the end and setB have a reference count of 1 at the end? From what I have figured out by trial and error, setB is correct, and there is no memory leak, but I'd like to understand why that is the case (what is wrong with my understanding of "new", "autorelease", "retain", and "release").

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• Selectively intercepting methods using autofac and dynamicproxy2

  - by Mark Simpson

  I'm currently doing a bit of experimenting using Autofac-1.4.5.676, autofac contrib and castle DynamicProxy2. The goal is to create a coarse-grained profiler that can intercept calls to specific methods of a particular interface. The problem: I have everything working perfectly apart from the selective part. I gather that I need to marry up my interceptor with an IProxyGenerationHook implementation, but I can't figure out how to do this. My code looks something like this: The interface that is to be intercepted & profiled (note that I only care about profiling the Update() method) public interface ISomeSystemToMonitor { void Update(); // this is the one I want to profile void SomeOtherMethodWeDontCareAboutProfiling(); } Now, when I register my systems with the container, I do the following: // Register interceptor gubbins builder.RegisterModule(new FlexibleInterceptionModule()); builder.Register<PerformanceInterceptor>(); // Register systems (just one in this example) builder.Register<AudioSystem>() .As<ISomeSystemToMonitor>) .InterceptedBy(typeof(PerformanceInterceptor)); All ISomeSystemToMonitor instances pulled out of the container are intercepted and profiled as desired, other than the fact that it will intercept all of its methods, not just the Update method. Now, how can I extend this to exclude all methods other than Update()? As I said, I don't understand how I'm meant to say "for the ProfileInterceptor, use this implementation of IProxyHookGenerator". All help appreciated, cheers! Also, please note that I can't upgrade to autofac2.x right now; I'm stuck with 1.

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• iPhone app: How to implement in-app purchased game levels

  - by Wonderflonium

  So, I understand that it's possible to set up in-app purchases for iPhone apps to purchase non-consumables like game levels. I understand the logic behind the purchase part, but what I don't understand is, how can I deliver the new game level. For example: I build an app that contains the first level and they purchase additional levels. Is it better to build all the other levels into the app and whenever they purchase the app, it unlocks it with a plist entry or something? That doesn't seem very update-able to me. Every time I come up with a new level, I'd have to update the app. So, what I don't understand then, is what is how do I package up a level and download it as a separate entity that can accessed by the game? Would the level just be some XML with images in a ZIP folder or something? How does the level get added to the game? What are best practices for this type of thing? I Googled and have found NOTHING about this. I'm a little bit confused by the concept and any help would be appreciated. I'm not looking for someone to write the game for me, I just need pointed in the right direction so I can develop it on my own.

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• Extremely slow MFMailComposeViewControllerDelegate

  - by Jeff B

  I have a bit of a strange problem. I am trying to send in-app email. I am also using Cocos2d. It works, so far as I get the mail window and I can send mail, but it is extremely slow. It seems to only accept touches every second or so. I checked the cpu usage, and it is quite low. I paused my director, so nothing else should be happening. Any ideas? I am pulling my hair out. I looked at some examples and did the following: Made my scene the mail delegate: @interface MyLayer : CCLayer <MFMailComposeViewControllerDelegate> { ... } And implemented the following function in the scenes: -(void) showEmailWindow: (id) sender { [[CCDirector sharedDirector] pause]; MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; [picker setSubject: @"My subject here"]; NSString *emailBody = @"<h1>Here is my email!</h1>"; [picker setMessageBody:emailBody isHTML:YES]; [myMail presentModalViewController:picker animated:NO]; [picker release]; } I also implemented the mailComposeController, to handle the callback.

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• Low Latency Serial Communications In .Net

  - by bvillersjr

  I have been researching various third party libraries and approaches to low latency serial communications in .Net. I've read enough that I have now come full circle and know as little as I did when I started due to the variety of conflicting opinions. For example, the functionality in the Framework was ruled out due to some convincing articles stating: "that the Microsoft provided solution has not been stable across framework versions and is lacking in functionality." I have found articles bashing many of the older COM based libraries. I have found articles bashing the idea of a low latency .Net app as a whole due to garbage collection. I have also read articles demonstrating how P/Invoking Windows API functionality for the purpose of low latency communication is unacceptable. THIS RULES OUT JUST ABOUT ANY APPROACH I CAN THINK OF! I would really appreciate some words from those with been there / done that experience. Ideally, I could locate a solid library / partner and not have to build the communications library myself. I have the following simple objectives: Sustained low latency serial communication in C# / VB.Net 32/64 bit Well documented (if the solution is 3rd party) Relatively unimpacted (communication and latency wise) by garbage collection . Flexible (I have no idea what I will have to interface with in the future!) The only requirement that I have for certain is that I need to be able to interface with many different industrial devices such as RS485 based linear actuators, serial / microcontroller based gauges, and ModBus (also RS485) devices. Any comments, ideas, thoughts or links to articles that may iron out my confusion are much appreciated!

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• dll injection using C

  - by AJINKYA

  hey i m trying to inject a dll into a process i.e lsass.exe to get hashes.Its a bit hacky but cant help its my project. I have a code of dll injection but in visual C++ it gives errors such as.. at TEXT("LoadLibraryA"))))----argument const wchar incompatible with LPCSTR at lpFuncAddr-----------argument type "LPVOID" incompatible with parameter type "LPTHREAD_START ROUTINE" CODE: BOOL InjectDLL(DWORD dwProcessId, LPCSTR lpszDLLPath) { HANDLE hProcess, hThread; LPVOID lpBaseAddr, lpFuncAddr; DWORD dwMemSize, dwExitCode; BOOL bSuccess = FALSE; HMODULE hUserDLL; //convert char to wchar char *lpszDLLPath = "hash.dll"; size_t origsize = strlen(orig) + 1; const size_t newsize = 100; size_t convertedChars = 0; wchar_t dllpath[newsize]; mbstowcs_s(&convertedChars, dllpath, origsize, orig, _TRUNCATE); if((hProcess = OpenProcess(PROCESS_CREATE_THREAD|PROCESS_QUERY_INFORMATION|PROCESS_VM_OPERATION |PROCESS_VM_WRITE|PROCESS_VM_READ, FALSE, dwProcessId))) { dwMemSize = wcslen(dllpath) + 1; if((lpBaseAddr = VirtualAllocEx(hProcess, NULL, dwMemSize, MEM_COMMIT, PAGE_READWRITE))) { if(WriteProcessMemory(hProcess, lpBaseAddr, lpszDLLPath, dwMemSize, NULL)) { if((hUserDLL = LoadLibrary(TEXT("kernel32.dll")))) { if((lpFuncAddr = GetProcAddress(hUserDLL, TEXT("LoadLibraryA")))) { if((hThread = CreateRemoteThread(hProcess, NULL, 0, lpFuncAddr, lpBaseAddr, 0, NULL))) { WaitForSingleObject(hThread, INFINITE); if(GetExitCodeThread(hThread, &dwExitCode)) { bSuccess = (dwExitCode != 0) ? TRUE : FALSE; } CloseHandle(hThread); } } FreeLibrary(hUserDLL); } } VirtualFreeEx(hProcess, lpBaseAddr, 0, MEM_RELEASE); } CloseHandle(hProcess); } return bSuccess; } int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow) { if(InjectDLL(PROCESSID, "hash.dll")) { MessageBox(NULL, TEXT("DLL Injected!"), TEXT("DLL Injector"), MB_OK); }else { MessageBox(NULL, TEXT("Couldn't inject DLL"), TEXT("DLL Injector"), MB_OK | MB_ICONERROR); } return 0; } i m a beginner to dll and windows programming so will appreciate your help.

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• Why so much stack space used for each recursion?

  - by Harvey

  I have a simple recursive function RCompare() that calls a more complex function Compare() which returns before the recursive call. Each recursion level uses 248 bytes of stack space which seems like way more than it should. Here is the recursive function: void CMList::RCompare(MP n1) // RECURSIVE and Looping compare function { auto MP ne=n1->mf; while(StkAvl() && Compare(n1=ne->mb)) RCompare(n1); // Recursive call ! } StkAvl() is a simple stack space check function that compares the address of an auto variable to the value of an address near the end of the stack stored in a static variable. It seems to me that the only things added to the stack in each recursion are two pointer variables (MP is a pointer to a structure) and the stuff that one function call stores, a few saved registers, base pointer, return address, etc., all 32-bit (4 byte) values. There's no way that is 248 bytes is it? I don't no how to actually look at the stack in a meaningful way in Visual Studio 2008. Thanks

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• Conditional Drag and Drop Operations in Flex/AS3 Tree

  - by user163757

  Good day everyone. I am currently working with a hierarchical tree structure in AS3/Flex, and want to enable drag and drop capabilities under certain conditions: Only parent/top level nodes can be moved Parent/top level nodes must remain at this level; they can not be moved to child nodes of other parent nodes Using the dragEnter event of the tree, I am able to handle condition 1 easily. private function onDragEnter(event:DragEvent):void { // only parent nodes (map layers) are moveable event.preventDefault(); if(toc.selectedItem.hasOwnProperty("layer")) DragManager.acceptDragDrop(event.target as UIComponent); else DragManager.showFeedback(DragManager.NONE); } Handling the second condition is proving to be a bit more difficult. I am pretty sure the dragOver event is the place for logic. I have been experimenting with calculateDropIndex, but that always gives me the index of the parent node, which doesn't help check if the potential drop location is acceptable or not. Below is some pseudo code of what I am looking to accomplish. private function onDragOver(e:DragEvent):void { // if potential drop location has parents // dont allow drop // else // allow drop } Can anyone provide advice how to implement this?

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• Converting John Resig's JavaScript Templating Engine to work with PHP Templates

  - by Serhiy

  I'm trying to convert the John Resig's Templating Engine to work with PHP. Essentially what I would like to achieve is the ability to use certain Kohana Views via a JavaScript templating engine, that way I can use the same views for both a standard PHP request and a jQuery AJAX request. I'm starting with the basics and would like to be able to convert http://github.com/nje/jquery-tmpl/blob/master/jquery.tmpl.js To work with php like so... ### From This ### <li><a href="{%= link %}">{%= title %}</a> - {%= description %}</li> ### Into This ### <li><a href="<?= $link ?>"><?= $title ?></a> - <?= description ?></li> The RexEx in it is a bit over my head and it's apparently not as easy as changing the %} to ? in lines 148 to 158. Any help would be highly appreciated. I'm also not sure of how to take care of the $ difference that PHP variables have. Thanks, Serhiy

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• Trouble binding WPF Menu to ItemsSource

  - by chaiguy

  I would like to avoid having to build a menu manually in XAML or code, by binding to a list of ICommand-derived objects. However, I'm experiencing a bit of a problem where the resulting menu has two levels of menu-items (i.e. each MenuItem is contained in a MenuItem): My guess is that this is happening because WPF is automatically generating a MenuItem for my binding, but the "viewer" I'm using actually already is a MenuItem (it's derived from MenuItem): <ContextMenu x:Name="selectionContextMenu" ItemsSource="{Binding Source={x:Static OrangeNote:Note.MultiCommands}}" ItemContainerStyleSelector="{StaticResource separatorStyleSelector}"> <ContextMenu.ItemTemplate> <DataTemplate> <Viewers:NoteCommandMenuItemViewer CommandParameter="{Binding Source={x:Static OrangeNote:App.Screen}, Path=SelectedNotes}" /> </DataTemplate> </ContextMenu.ItemTemplate> </ContextMenu> (The ItemContainerStyleSelector is from http://bea.stollnitz.com/blog/?p=23, which allows me to have Separator elements inside my bound source.) So, the menu is bound to a collection of ICommands, and each item's CommandParameter is set to the same global target (which happens to be a collection, but that's not important). My question is, is there any way I can bind this such that WPF doesn't automatically wrap each item in a MenuItem?

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• iPhone app memory leak with UIImage animation? Problem testing on device

  - by user157733

  I have an animation which works fine in the simulator but crashes on the device. I am getting the following error... Program received signal: “0”. The Debugger has exited due to signal 10 (SIGBUS) A bit of investigating suggests that the UIImages are not getting released and I have a memory leak. I am new to this so can someone tell me if this is the likely cause? If you could also tell me how to solve it then that would be amazing. The images are 480px x 480px and about 25kb each. My code is below... NSArray *rainImages = [NSArray arrayWithObjects: [UIImage imageNamed:@"rain-loop0001.png"], [UIImage imageNamed:@"rain-loop0002.png"], [UIImage imageNamed:@"rain-loop0003.png"], [UIImage imageNamed:@"rain-loop0004.png"], [UIImage imageNamed:@"rain-loop0005.png"], [UIImage imageNamed:@"rain-loop0006.png"], //more looping images [UIImage imageNamed:@"rain-loop0045.png"], [UIImage imageNamed:@"rain-loop0046.png"], [UIImage imageNamed:@"rain-loop0047.png"], [UIImage imageNamed:@"rain-loop0048.png"], [UIImage imageNamed:@"rain-loop0049.png"], [UIImage imageNamed:@"rain-loop0050.png"], nil]; rainImage.animationImages = rainImages; rainImage.animationDuration = 4.15/2; rainImage.animationRepeatCount = 0; [rainImage startAnimating]; [rainImage release]; Thanks

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• What are the primitive Forth operators?

  - by Barry Brown

  I'm interested in implementing a Forth system, just so I can get some experience building a simple VM and runtime. When starting in Forth, one typically learns about the stack and its operators (DROP, DUP, SWAP, etc.) first, so it's natural to think of these as being among the primitive operators. But they're not. Each of them can be broken down into operators that directly manipulate memory and the stack pointers. Later one learns about store (!) and fetch (@) which can be used to implement DUP, SWAP, and so forth (ha!). So what are the primitive operators? Which ones must be implemented directly in the runtime environment from which all others can be built? I'm not interested in high-performance; I want something that I (and others) can learn from. Operator optimization can come later. (Yes, I'm aware that I can start with a Turing machine and go from there. That's a bit extreme.) Edit: What I'm aiming for is akin to bootstrapping an operating system or a new compiler. What do I need do implement, at minimum, so that I can construct the rest of the system out of those primitive building blocks? I won't implement this on bare hardware; as an educational exercise, I'd write my own minimal VM.

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• Limit foreign key choices in select in an inline form in admin

  - by mightyhal

  Edited :-) Hopefully a bit clearer now. The logic is of the model is: A Building has many Rooms A Room may be inside another Room (a closet, for instance--ForeignKey on 'self') A Room can only in inside of another Room in the same building (this is the tricky part) Here's the code I have: #spaces/models.py from django.db import models class Building(models.Model): name=models.CharField(max_length=32) def __unicode__(self): return self.name class Room(models.Model): number=models.CharField(max_length=8) building=models.ForeignKey(Building) inside_room=models.ForeignKey('self',blank=True,null=True) def __unicode__(self): return self.number and: #spaces/admin.py from ex.spaces.models import Building, Room from django.contrib import admin class RoomAdmin(admin.ModelAdmin): pass class RoomInline(admin.TabularInline): model = Room extra = 2 class BuildingAdmin(admin.ModelAdmin): inlines=[RoomInline] admin.site.register(Building, BuildingAdmin) admin.site.register(Room) The inline will display only rooms in the current building (which is what I want). The problem, though, is that for the inside_room drop down, it displays all of the rooms in the Rooms table (including those in other buildings). In the inline of rooms, I need to limit the inside_room choices to only rooms which are in the current building being displayed by the main form. I can't figure out a way to do it with either a limit_choices_to in the model, nor can I figure out how exactly to override the admin's inline formset properly (I feel like I should be somehow create a custom inline form, pass the building_id of the main form to the custom inline, then limit the queryset for the field's choices based on that--but I just can't wrap my head around how to do it). Maybe this is too complex for the admin site, but it seems like something that would be generally useful... Thanks again for your help!

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• Vlad the deployer on Dreamhost - initial script

  - by xmariachi

  Hi, I'm trying to deploy an app with SVN and Vlad the deployer. Vlad and its dependencies are installed and seem OK. I'm trying the following: rake prod vlad:update Being my config/deploy.rb file: task :prod do set :application, "xxx" set :deploy_timestamped, "false" set :user, "username" set :scm_user, "scmusername" set :repository, "http://domain.com/svn/app" set :domain, "domain.com" set :deploy_to, "/home/username/deployments/app" puts "Production deployment to #{deploy_to}" end I have done "rake prod vlad:setup" already, that's fine. But when calling "rake prod vlad:update", I get the following A ...file Exported revision 14. ln: creating symbolic link `/home/username/deployments/drupalgestalt/releases/20100503164225/public/system' to `/home/username/deployments/drupalgestalt/shared/system': No such file or directory rake aborted! execution failed with status 1: ssh domain.com ln -s /home/username/deployments/app/shared/log /home/username/deployments/app/releases/20100503164225/log && ln -s /home/username/deployments/app/shared/system /home/username/deployments/app/releases/20100503164225/public/system && ln -s /home/username/deployments/app/shared/pids /home/username/deployments/app/releases/20100503164225/tmp/pids Apparently it complains when creating the ln, but permissions are all set up fine. Am I doing anything wrong? I'm just starting with Vlad on the assumption it was super-easy to set up. Had played a bit with cap in the past, and I do like Vlad idea.

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• custom C++ boost::lambda expression help

  - by aaa

  hello. A little bit of background: I have some strange multiple nested loops which I converted to flat work queue (basically collapse single index loops to single multi-index loop). right now each loop is hand coded. I am trying to generalized approach to work with any bounds using lambda expressions: For example: // RANGE(i,I,N) is basically a macro to generate `int i = I; i < N; ++i ` // for (RANGE(lb, N)) { // for (RANGE(jb, N)) { // for (RANGE(kb, max(lb, jb), N)) { // for (RANGE(ib, jb, kb+1)) { // is equivalent to something like (overload , to produce range) flat<1, 3, 2, 4>((_2, _3+1), (max(_4,_3), N), N, N) the internals of flat are something like: template<size_t I1, size_t I2, ..., class L1_, class L2, ..._> boost::array<int,4> flat(L1_ L1, L2_ L2, ...){ //boost::array<int,4> current; class variable bool advance; L2_ l2 = L2.bind(current); // bind current value to lambda { L1_ l1 = L1.bind(current); //bind current value to innermost lambda l1.next(); advance = !(l1 < l1.upper()); // some internal logic if (advance) { l2.next(); current[0] = l1.lower(); } } //..., } my question is, can you give me some ideas how to write lambda (derived from boost) which can be bound to index array reference to return upper, lower bounds according to lambda expression? thank you much

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