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  • Performance implications of BeginInvoke

    - by AngryHacker
    I've inherited code where BeginInvoke is called from the main thread (not a background thread, which is usually the pattern). I am trying to understand what it actually does in this scenario. Does the method being called in the BeginInvoke get in line of messages that come down to the window? The docs say asynchronously, so that is my assumption. How does the framework prioritize when to kick off the method called by BeginInvoke?

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  • Enabling browser caching via java

    - by Franz See
    Good day, I am using CacheFilter to filter a certain path to my server (which outputs an image stream to the response stream). And I've configured it in my web.xml as follows: <filter> <filter-name>imagesCache</filter-name> <filter-class>com.samaxes.cachefilter.presentation.CacheFilter</filter-class> <init-param> <param-name>privacy</param-name> <param-value>public</param-value> </init-param> <init-param> <param-name>expirationTime</param-name> <param-value>2592000</param-value> </init-param> </filter> ... <filter-mapping> <filter-name>imagesCache</filter-name> <url-pattern>/my/path/*</url-pattern> </filter-mapping> Using my firefox, if I access my url via the address bar, it hits the server the first time but uses the cache during succeeding calls. However, if the url is inside my page ( i.e. <img src="..."/> ), it seems to hit the server all the time. [EDIT] After a few more testing, accessing my image via the address bar does not work all the time. But caching does seem to work more often with it than . As to whether it really, I am not sure. Additional Info: my path is something like /my/path?then=some&query=strings. Notice that it doesn't have an extension (i.e. gif, png, jpeg ) but it's mimetype is set properly ( image/gif, image/png, image/jpeg ). I am not sure if the lack of extension or the presence of the query strings have any impact. (Also, another note. though my url have query strings, I am using the same uri + query string over and over again with my tests). Any ideas why? Thanks

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  • Is it normal for a programmer with 2 years experience to take a long time to code simple programs?

    - by ajax81
    Hi all, I'm a relatively new programmer (18 months on the scene), and I'm finally getting to the point where I'm comfortable accepting projects and developing solutions under minimal supervision. Unfortunately, this also means that I've become acutely aware of my performance shortfalls, the most prevalent of which is the amount of time it takes me to develop, test, and submit algorithms for review. A great example of what I'm talking about occurred this week when I was tasked with developing a simple XML web service (asp.net 3.5) callable via client-side JavaScript, that accepts a single parameter and returns a dataset output to a modal window (please note this is the first time I've had to develop a web service and have had ZERO experience creating/consuming them...let alone calling them from JS client side). Keeping a long story short -- I worked on it for 4 days straight, all day each day, for a grand total of 36 hours, not including the time I spent dwelling on the problem in the shower, the morning commute, and laying awake in bed at night. I learned a great deal about web services and xml/json/javascript...but was called in for a management review to discuss the length of time it took me to develop the solution. In the meeting, I was praised for the quality of my work and was in fact told that my effort was commendable. However, they (senior leads and pm's) weren't impressed with the amount of time it took me to develop the solution and expressed that they would have liked to see the solution in roughly 1/3 of the time it took me. I guess what concerns me the most is that I've identified this pattern as common for myself. Between online videos, book research, and trial/error coding...if its something I haven't seen before, I can spend up to two weeks on a problem that seems to only take the pros in the videos moments to code up. And of course, knowing that management isn't happy with this pattern has shaken me up a bit. To sum up, I have some very specific questions I'd like to ask, and would greatly appreciate your objective professional feedback. Is my experience as a junior programmer common among new developers? Or is it possible that I'm just not cut out for the work? If you suspect that my experience is not common and that there may be an aptitude issue, do you have any suggestions/solutions that I could propose to management to help bring me up to speed? Do seasoned, professional programmers ever encounter knowledge barriers that considerably delay deliverables? When you started out in the industry, did you know how to "do it all"? If not, how long did it take you to be perceived as "proficient"? Was it a natural progression of trial and error, or was there a particular zen moment when you knew you had achieved super saiyen power level? Anyways, thanks for taking the time to read my question(s). I don't know if this is the right place to ask for professional career guidance, but I greatly appreciate your willingness to help me out. Cheers, Daniel

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  • Regex to match 0 - 999 but not blank

    - by James Cadd
    I'm working on a regex to match valid integer numbers such as the following: 0 1 99 999 However it should not allow matching an empty string. The closest I can get is: (0)|\\d{1,3} Which to me says a matching string will have either a zero or a series of digits between 1 and 3 characters long. However, empty strings still appear to match this pattern. What's the proper way to exclude empty strings from this regex?

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  • Sybase to SQLserver linkserver errors

    - by George
    I have set up a SQL link server between an SQLserver 2005 on a W2003 R2 and a SYBASE 12.5.0.2 server on a IBM AIX H70 system. I use the Sybase ODBC driver 04.20.00.67 The problem is than most of the times (there is no pattern ) when I select rows from a Sybase table I get ONLY ONE ROW without any error. Please note that there is no problem when I insert rows from SQL server to the SYBASE server I appreciate any possible solutions...

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  • Have you been stuck with the math in a Flash project?

    - by VideoDnd
    Have you been stuck with the math in a Flash project? It's a loose design pattern my director formulated. My goal is to keep the project object oriented, and get 'non Flash obstacles' off my plate. XML values going to AS3, updating a changing acceleration formula. I don't hate math, but it just doesn't seem OOP or good project planning to have the math stuck in Flash. Your comments are welcome.

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  • How can I get nexus to proxy springsource maven repository on s3?

    - by Peter Kahn
    I have nexus 1.5.0 setup to proxy springsource repositories but it's not working. The repositories are on s3 that nexus doesn't seem to understand how to deal with that. What's the right pattern? Here are the repositories I'm told I need, but I cannot access the maven paths with in them http://repository.springsource.com/maven/bundles/release http://repository.springsource.com/maven/bundles/external Do, I need to mirror these locally?

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  • ColdFusion MVC frameworks & RESTful Service mismatch?

    - by Henry
    Most CF MVC Frameworks use the front controller pattern. Usually Search Engine Safe (SES) plugin together with URL Rewrite are used to construct friendly URLs. However, when it comes to implementing RESTful services, using a MVC framework seems like a layer of complexity added on top of another layer of complexity. How should one tame this beast? Any nice and clean approach of supporting RESTful services with ColdFusion? Any MVC framework out there that can expose RESTful services easily? Thanks

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  • regex count in single match

    - by 01
    i want to check if string doesnt have more than 5 numbers, i can do it this way Matcher matcher = Pattern.compile("\\d").matcher(val); i = 0; while (matcher.find()) { i++; } However i would like to do it without while(because we are using regex validation framework). I want to be able to match strings like A2sad..3f,3,sdasad2..2

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  • Need to fix my regex

    - by Misha Zaslavsky
    I am trying to match a string to a regex pattern, but have some problems. My string could have 3 forms: [dbo].[Start] dbo.Start Start This is my regex: "^((\[)?dbo(\])?)?(\.)?(\[)?Start(\])?$" All 3 forms returns success but there are some more options such as: [dboStart or dbo[Start I know that this is because it is optional, but how could I make dependencies when making optional, so that if one optional has value then the second optional must have a value too. Could you help me please to fix this? Thanks.

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  • php csv high load request

    - by msaif
    i have PHP serve and one csv file . i need to read csv file and send the data to the browser. if individual request = 10,000 or more (may be) then reading csv file from harddisk may be costly.how can i efficiently read csv file from PHP and send the data to the browser. there is no option to read data form relational db. only browser<-------------PHP(apache)<----------------CSV flow pattern.

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  • Can you do Logic Programming in Scala?

    - by Alex R
    I read somewhere that Pattern Matching like that supported by the match/case feature in Scala was actually borrowed from Logic languages like Prolog. Can you use Scala to elegantly solve problems like the Connected Graph problem? e.g. https://www.csupomona.edu/~jrfisher/www/prolog_tutorial/2_15.html

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  • simple text menu in Haskell

    - by snorlaks
    Hello, I would like to know what is the best solution to create simple menu with functionality described below (pseudo code) just like im used to: while (true){ x = readLine(); case (x): x == "1" then do sth1 function x == "2" then do sth2 function } thanks for help, maybe any other ideas on how to make menu not in pattern described above?

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  • Java regex return after first match

    - by user216915
    hi how do i return after the first match of regular expression? (does the Matcher.find() method do that? ) say I have a string "abcdefgeee". I want to ask the regex engine stop finding immediately after it finds the first match of "e" for example. I am writing a method to return true/false if the pattern is found and i don't want to find the whole string for "e". (I am looking for a regex solution ) thanks

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  • Some F# Features that I would like to see in C# any help?

    - by WeNeedAnswers
    After messing about with F# there are some really nice features that I think I am going to miss when I HAVE to go back to c#, any clues on how I can ween myself off the following, or better still duplicate their functionality: Pattern Matching (esp. with Discriminating Unions) Discriminating Unions Recursive Functions (Heads and Tails on Lists) And last but not least the Erlang inspired Message Processing.

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  • Tomcat 403 error after LDAP authentication.

    - by user352636
    I'm currently trying to use an LDAP server to authenticate users who are trying to access our Tomcat setup. I believe I have managed to get the LDAP authentication working in the form of a JNDI realm call from Tomcat, but immediately after the user enters their password Tomcat starts throwing 403 (permission denied) errors for everything except from the root page (ttp://localhost:1337/). I have no idea why this is happening. I am following the example at http://blog.mc-thias.org/?title=tomcat_ldap_authentication&more=1&c=1&tb=1&pb=1 . server.xml (the interesting/changed bits) <Realm className="org.apache.catalina.realm.JNDIRealm" debug="99" connectionURL="ldap://localhost:389" userPattern="uid={0},ou=People,o=test,dc=company,dc=uk" userSubTree="true" roleBase="ou=Roles,o=test,dc=company,dc=uk" roleName="cn" roleSearch="memberUid={1}" /> <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> web.xml (the interesting/changed bits) <security-constraint> <display-name>Security Constraint</display-name> <web-resource-collection> <web-resource-name>Protected Area</web-resource-name> <!-- Define the context-relative URL(s) to be protected --> <url-pattern>/*</url-pattern> <!-- If you list http methods, only those methods are protected --> </web-resource-collection> <auth-constraint> <!-- Anyone with one of the listed roles may access this area --> <role-name>admin</role-name> <role-name>regular</role-name> </auth-constraint> </security-constraint> <!-- Default login configuration uses form-based authentication --> <login-config> <auth-method>BASIC</auth-method> </login-config> <!-- Security roles referenced by this web application --> <security-role> <role-name>admin</role-name> <role-name>regular</role-name> </security-role> I cannot access my LDAP setup at the moment, but I believe it is alright as the login is accepted by the BASIC auth method, it's just tomcat that is rejecting it. The roles should be as defined in web.xml - admin and regular. If there is any other information you require me to provide, please just ask! My thanks in advance to anyone who can help, and my apologies for any major mistakes I have made - yesterday was pretty much the first time I'd ever heard of LDAP =D. EDIT: Fixed the second xml segment. Apologies for the formating-fail.

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  • Error in django url.py??

    - by qulzam
    I am new in django. I try to practice and run the wiki application (i found tutorial at Learn django), In url.py file i write the following urls... urlpatterns = patterns('', (r'^wikicamp/(?p[^/]+)/edit/$','wikiapp.wiki.views.edit_page'), (r'^wikicamp/(?p[^/]+)/save/$','wikiapp.wiki.views.save_page'), (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'), ) But there is errror which i cant understand. sre_Constants.error:Unexpected end of pattern. (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'),

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  • Using target-specific variable in makefile

    - by James Johnston
    I have the following makefile: OUTPUTDIR = build all: v12target v13target v12target: INTDIR = v12 v12target: DoV12.avrcommontargets v13target: INTDIR = v13 v13target: DoV13.avrcommontargets %.avrcommontargets: $(OUTPUTDIR)/%.elf @true $(OUTPUTDIR)/%.elf: $(OUTPUTDIR)/$(INTDIR)/main.o @echo TODO build ELF file from object file: destination $@, source $^ @echo Compiled elf file for $(INTDIR) > $@ $(OUTPUTDIR)/$(INTDIR)/%.o: %.c @echo TODO call GCC to compile C file: destination $@, source $< @echo Compiled object file for $<, revision $(INTDIR) > $@ $(shell rm -rf $(OUTPUTDIR)) $(shell mkdir -p $(OUTPUTDIR)/v12 2> /dev/null) $(shell mkdir -p $(OUTPUTDIR)/v13 2> /dev/null) .SECONDARY: The idea is that there are several different code configurations that need to be compiled from the same source code. The "all" target depends on v12target and v13 target, which set a number of variables for that particular build. It also depends on an "avrcommontargets" pattern, which defines how to actually do the compiling. avrcommontargets then depends on the ELF file, which in turn depends on object files, which are built from the C source code. Each compiled C file results in an object file (*.o). Since each configuration (v12, v13, etc.) results in a different output, the C file needs to be built several times with the output placed in different subdirectories. For example, "build/v12/main.o", "build/v13/main.o", etc. Sample output: TODO call GCC to compile C file: destination build//main.o, source main.c TODO build ELF file from object file: destination build/DoV12.elf, source build//main.o TODO build ELF file from object file: destination build/DoV13.elf, source build//main.o The problem is that the object file isn't going into the correct subdirectory. For example, "build//main.o" instead of "build/v12/main.o". That then prevents the main.o from being correctly rebuilt to generate the v13 version of main.o. I'm guessing the issue is that $(INTDIR) is a target specific variable, and perhaps this can't be used in the pattern targets I defined for %.elf and %.o. The correct output would be: TODO call GCC to compile C file: destination build/v12/main.o, source main.c TODO build ELF file from object file: destination build/DoV12.elf, source build/v12/main.o TODO call GCC to compile C file: destination build/v13/main.o, source main.c TODO build ELF file from object file: destination build/DoV13.elf, source build/v13/main.o What do I need to do to adjust this makefile so that it generates the correct output?

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  • How to change easily between ajax-based website and basic HTML website?

    - by A.S al-shammari
    Hi, I have a website ( based on JSP/Servlets ,using MVC pattern), and I want to support AJAX-based website and basic HTML-based website. website visitors should be able to change the surfing mode from Ajax to basic HTML and vise versa, - as it applies in Google-mail. The Questions : What is the best way to achieve this goal easily? Should I design two views for each page? I use JQuery and JSON as the result of this answer.

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  • What is common architecture of notification system on the web-forum, PMB and etc.?

    - by glaz666
    What I need is - list of new stuff from last visit - when user has already checked out some new entity since his last visit (ex. post on forum), mark this entity as read in the list - count different types of entities - private messages, posts, comments and etc. There are lot of websites using this technique for private messaging, listing new stuff and etc (ex. phpBB, this one and etc). Are there any common pattern, description of the system core which will events, making lists?

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  • PHP regular expression find and append to string

    - by Gary
    I'm trying to use regular expressions (preg_match and preg_replace) to do the following: Find a string like this: {%title=append me to the title%} Then extract out the title part and the append me to the title part. Which I can then use to perform a str_replace(), etc. Given that I'm terrible at regular expressions, my code is failing... preg_match('/\{\%title\=(\w+.)\%\}/', $string, $matches); What pattern do I need? :/

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  • How effective are technical test(s) and is it necessary?

    - by The Elite Gentleman
    Hi everyone, I recently took a Java technical test (for a company who wanted are looking for senior java developers) and, funny enough, I only realised the technical terms of what I've been doing all along after I've written the test. I'm not too IT jargon when it comes to development but I can pretty much code and create solutions unaware that I'm using design pattern (or the specifics of that design pattern) or technology. I learned things such as JMS, Frameworks, etc. while programming at home and having to google stuff online to problems I have. Others e.g. IoC, Surrogates in Databases, etc., I have used extensively without knowing that it had a name for it. Do you think that these technical test are effective and why? What interesting questions did you find that boggled your brains out while the clock kept ticking? Seeing that IT is vastly evolving at a rapid rate, do we have to constantly be updated with new terms that comes out? Some questions I was asked : What object oriented principle is violated by this architectural mechanism for dot notation? Is indexing tables effective for range query or point query search? What is ThreadLocal and what is it used for? Method overloading vs Method overriding. What is the difference between the 2? What is dynamic binding? Now, imagine my poor head trying to understand these jargons (considering I use it almost everyday) PS The question was not a programming question, where you have a problem and write code to solve it. Rather, a thinking type question and you write answers (against the clock). Update I clearly didn't come out clearly as I should have. There are those that are technically "book smart" but with very little hands-on experience and vice versa. So, the question (in connection to what I've asked) is that are these technical test seeking "book smart" people or people with lots of hands-on experience (some who are not that well clued up with too much book-smart jargons). How effective is it then, for companies to look for developers if most of the questions are too terminology-centric? (if that's the correct term, :))

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