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  • Why does Windows 7 x64 work faster than an x86 edition on my PC?

    - by Jasper
    Why does Windows 7 x64 work faster than an x86 edition on my PC even though I mostly use x86 things in it? What's wrong with me, and what am I missing? Majority of the things I use is x86 (e.g. DAWs, games, media players). A considerable amount of them, however, are x64 (although their x86 counterparts work just fine). I've tried using the same things on the same system but always ended up finding Windows 7 x64 working slightly faster than x86. I'm very observant. I even notice the tiniest window animations. System: Windows 7 Ultimate x64 CPU: Intel Core 2 Duo E7500 @ 2.93 GHz RAM: 2 GB x 2 = 4 GB DDR2 @ 332 MHz Motherboard: Intel D945GCNL Graphics: ATI Radeon HD 4350 @ 1 GB Dedicated Audio: M-Audio FastTrack Pro HDD: Samsung HD753LJ 733 GB & Samsung HD160JJ 156 GB As you can see, my system is old.

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  • Why isn't the "this." command needed in this constructor? (java)

    - by David
    I'm reading a book about java. It just got to explaining how you create a class called "deck" which contains an array of cards as its instance variable(s). Here is the code snippit: class Deck { Card[] cards; public Deck (int n) { cards = new Card[n]; } } why isn't the this. command used? for example why isn't the code this: class Deck { Card[[] cards; public Deck (int n) { this.cards = new Card[n]; } }

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  • If we don't like it for the presentation layer, then why do we tolerate it for the behavior layer?

    - by greim
    Suppose CSS as we know it had never been invented, and the closest we could get was to do this: <script> // this is the page's stylesheet $(document).ready(function(){ $('.error').css({'color':'red'}); $('a[href]').css({'textDecoration':'none'}); ... }); </script> If this was how we were forced to write code, would we put up with it? Or would every developer on Earth scream at browser vendors until they standardized upon CSS, or at least some kind of declarative style language? Maybe CSS isn't perfect, but hopefully it's obvious how it's better than the find things, do stuff method shown above. So my question is this. We've seen and tasted of the glory of declarative binding with CSS, so why, when it comes to the behavioral/interactive layer, does the entire JavaScript community seem complacent about continuing to use the kludgy procedural method described above? Why for example is this considered by many to be the best possible way to do things: <script> $(document).ready(function(){ $('.widget').append("<a class='button' href='#'>...</div>"); $('a[href]').click(function(){...}); ... }); </script> Why isn't there a massive push to get XBL2.0 or .htc files or some kind of declarative behavior syntax implemented in a standard way across browsers? Is this recognized as a need by other web development professionals? Is there anything on the horizon for HTML5? (Caveats, disclaimers, etc: I realize that it's not a perfect world and that we're playing the hand we've been dealt. My point isn't to criticize the current way of doing things so much as to criticize the complacency that exists about the current way of doing things. Secondly, event delegation, especially at the root level, is a step closer to having a declarative behavior layer. It solves a subset of the problem, but it can't create UI elements, so the overall problem remains.)

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  • Why does SQLAlchemy with psycopg2 use_native_unicode have poor performance?

    - by Bob Dover
    I'm having a difficult time figuring out why a simple SELECT query is taking such a long time with sqlalchemy using raw SQL (I'm getting 14600 rows/sec, but when running the same query through psycopg2 without sqlalchemy, I'm getting 38421 rows/sec). After some poking around, I realized that toggling sqlalchemy's use_native_unicode parameter in the create_engine call actually makes a huge difference. This query takes 0.5secs to retrieve 7300 rows: from sqlalchemy import create_engine engine = create_engine("postgresql+psycopg2://localhost...", use_native_unicode=True) r = engine.execute("SELECT * FROM logtable") fetched_results = r.fetchall() This query takes 0.19secs to retrieve the same 7300 rows: engine = create_engine("postgresql+psycopg2://localhost...", use_native_unicode=False) r = engine.execute("SELECT * FROM logtable") fetched_results = r.fetchall() The only difference between the 2 queries is use_native_unicode. But sqlalchemy's own docs state that it is better to keep use_native_unicode=True (http://docs.sqlalchemy.org/en/latest/dialects/postgresql.html). Does anyone know why use_native_unicode is making such a big performance difference? And what are the ramifications of turning off use_native_unicode?

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  • REST - why we need million urls and different HTTP request?

    - by Andre
    I asked this question. But I still don't understand why we need to utilize different HTTP requests: DELETE/PUT/POST/GET in order to build nice API Wouldn't it be a lot simpler to pass all information in request parameters and have a SINGLE ENTRY-POINT for your api?: GET www.example.com/api?id=1&method=delete&returnformat=JSON GET www.example.com/api?id=1&method=delete&returnformat=XML or POST www.example.com/api {post data: id=1&method=delete&returnformat=JSON} POST www.example.com/api {post data: id=1&method=delete&returnformat=XML} and then - we can handle all methods and data internally without the need for hundreds of urls... how would you call this type of API - It's not REST apparently, it's not SOAP. then - what is it? UPDATE I'm not proposing any new standards here. I merely asking a question in order to better understand why web services work the way they work.

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  • Why does HDTune report better performing drives 2 months after installing them?

    - by Rolnik
    OK, so this is really weird. I ran HDTune on a newly set-up home-built computer and got the following readings from my drives in mid-November. SSD 154 MB/s RAID1 87 RAID0 198 (software installs) RAID0 98 Swap drive Today, in January, I run HDTune (same version) and get these results, in MB/s: SSD 186 RAID1 98 RAID0 241 RAID0 98 (Swap drive) Here are more details that HDTune reports on the SSD drive: HD Tune: OCZ-VERTEX Benchmark Blockquote Transfer Rate Minimum : 135.4 MB/sec Transfer Rate Maximum : 219.4 MB/sec Transfer Rate Average : 185.7 MB/sec Access Time : 0.1 ms Burst Rate : 187.3 MB/sec CPU Usage : -1.0% To get to my question: Why are my hard drives improving in performance? Most of my logical drives are in some form of RAID, except for the SSD. Will this performance ever deteriorate? Note, none of my drives are a hybrid drive that uses some form of SSD to enhance the write/reads on actual platters.

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  • Why would searching in Websphere Portal Administration exclude some results?

    - by Scott Leis
    I have logged into a website based on Websphere Portal 6.0, gone to the Administration console, then to Portlet Management - Portlets. At a guess, there are about 200 portlets on this server. 22 portlets have a title starting with "IGM", but if I use the "Title starts with" search option and enter "igm" (or any case variation), only one of these portlets is found. The portlets excluded from the "Title starts with" search are also excluded from the "Title contains" search, but some of them can be found with the "Unique name contains" search (noting that only 5 of these have a unique name). Why would title searches exclude these portlets? I also see similar behaviour in other areas of the Portal administration. E.g. going to Portal Settings - Custom Unique Names - Pages, and performing title searches excludes some results, depending on the search terms entered.

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  • Why can my Mac not connect to my iPhone via ssh?

    - by martin08
    I couldn't always ssh to my iPhone from my Mac. They're both on the same wifi network but sometimes the connection is established, sometimes it failed. From my Mac: $ ssh [email protected] ssh: connect to host 192.168.0.102 port 22: Operation timed out $ ping 192.168.0.102 PING 192.168.0.102 (192.168.0.102): 56 data bytes ping: sendto: No route to host ping: sendto: Host is down ping: sendto: Host is down I enabled SSH on the phone and am sure it can load webpages. So what might be a reason why they cannot connect? Thanks

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  • Why sizes are different, and what do they mean?

    - by Ramy
    I have a 1 TB hard drive that consists of one NTFS partition which I use to back up my data (no operating system). The size of all the data in it is : 726 GB, size on disk: 728 GB, and the used space when I check the properties is: 731 GB. There's a 5 GB difference between the size and the used space. Why is that huge difference there? What's the difference between these sizes? (size, size on disk, and used space) Is there a way to calculate the difference, and be sure the HDD is not messing around? Is that normal?

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  • Why is the binding icon not visible in blend?

    - by Ankit Rathod
    Hello, Why is the binding icon (a small gray icon) not visible in blend for some properties even though they are DependencyProperties? For eg. I dragged a button on my page and dragged a textbox. I want to bind button's content property to textbox's text property. But i can't find the Binding icon in Blend. I know if i type the binding syntax in code it will work just fine. But why is that icon missing? Thanks in advance :)

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  • Why does't rsync use delta-transfer for local files ?

    - by o_O Tync
    I have a big iso image which is currently being downloaded by a torrent client with space-reservation turned on: that means, file size is not changing while some chunks in in (4 Mib) are constantly changing because of a download. At 90% download I do the initial rsync to save time later: $ rsync -Ph DVD.iso /some/target/ sending incremental file list DVD.iso 2.60G 100% 40.23MB/s 0:01:01 (xfer#1, to-check=0/1) sent 2.60G bytes received 73 bytes 34.59M bytes/sec total size is 2.60G speedup is 1.00 Then, when the file's fully downloaded, I rsync again: total size is 2.60G speedup is 1.00 Speedup=1 says delta-transfer was not used, although 90% of the file has not changed. Why?!

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  • Why is the dictionary debug visualizer less useful in Visual Studio 2010?

    - by Kevin
    I was debugging in Visual Studio 2010, which we just installed and trying to look at a dictionary in the quick watch window. I see Keys and Values, but drilling into those shows the Count and Non-Public members, Non-Public members continues the trail and I never see the values in the dictionary. I can run test.Take(10) and see the values, but why should I have to do that. I don't have VS 2008 installed anymore to compare, but it seems that I could debug a dictionary much easier. Why is it this way now? Is it just a setting I set somehow on my machine? Test code: Dictionary<string, string> test = new Dictionary<string, string>(); test.Add("a", "b");

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  • How can I trace NTFS and Share Permissions to see why I can (or can't) write a file

    - by hometoast
    I'm trying to track down WHY I can write in a folder that, by my best estimation, I should not be able to write. The folder is shared with "Everyone" has "Full Control", with the files being more restrictive. My best guess is there's some sort of sub-group membership that's allowing me to write, but the nesting of groups that exists in our Active Directory is pretty extensive. Is there a tool, that will tell me which of the ACL entries allowed or disallowed my writing a file in a folder? The Effective Permissions dialog is marginally helpful, but what I need is something like a "NTFS ACL Trace Tool", if such a thing exists.

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  • Why does accessing a member of a malloced array of structs seg fault?

    - by WSkinner
    I am working through Learn C The Hard Way and am stumped on something. I've written a simplified version of the problem I am running into to make it easier to get down to it. Here is the code: #include <stdlib.h> #define GROUP_SIZE 10 #define DATA_SIZE 64 struct Dummy { char *name; }; struct Group { struct Dummy **dummies; }; int main() { struct Group *group1 = malloc(sizeof(struct Group)); group1->dummies = malloc(sizeof(struct Dummy) * GROUP_SIZE); struct Dummy *dummy1 = group1->dummies[3]; // Why does this seg fault? dummy1->name = (char *) malloc(DATA_SIZE); return 0; } when I try to set the name pointer on one of my dummies I get a seg fault. Using valgrind it tells me this is uninitialized space. Why is this?

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  • why Apache with ssl but back end weblogic without ssl works?

    - by huangli
        Hello everyone. my question is very simple . The link below is a picture about my architecture. https://docs.google.com/open?id=0BxSXbpgYIZVOR212RVk4ZDN1Sm8.      The pic above shows the architecture right now and it works correctly ! which means I could visit apache with url https//apchehost:8080, could not visit the web app with https served by weblogic but I could visit these app with https served by Apache(Apache is proxy server).      My question is why the Apache is configured with ssl but weblogic without ssl works ? I think weblogic should also configured with ssl . If this works , what about security level ? Is the ssl really works if only Apache configured with ssl but Weblogic without it ? Thanks . condition: Apache 2.2.17 with weblogic module mod_wl_22.so Weblogic: 10.3 OS: Windows server 2003

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  • Why is my implementation of strcmp not returning the proper value?

    - by Avanish Giri
    Why is this printing out 0 back in main but 6 when it is inside of the strcmp function? 7 int main() 8 { 9 char* str = "test string"; 10 char* str2 = "test strong"; 11 //printf("string length = %d\n",strlen(str)); 12 13 int num = strcmp(str,str2); 14 15 printf("num = %d\n",num); 16 } 29 int strcmp(char* str, char* str2) 30 { 31 if(*str == '\0' && *str2 == '\0') 32 return 0; 33 if(*str2 - *str == 0) 34 { 35 strcmp(str+1,str2+1); 36 } 37 else 38 { 39 int num = *str2 - *str; 40 cout << "num = " <<num<<endl; 41 return num; 42 } 43 } The output is: num = 6 num = 0 Why is it printing 0 when obviously the value that it should be returning is 6?

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  • Why does booting from a 64 bit Win 8 USB install work on a 32 bit laptop?

    - by Arabella
    I upgraded a 64 bit Windows 7 laptop to Windows 8 through the Upgrade Assistant, creating a bootable USB without any problems. I installed it successfully. Before I purchased an upgrade for my 32 bit Windows 7 laptop, I decided to boot from the USB with the 64 bit ISO to see what happened. The Windows 8 install screen came up with all the options. Should it not have detected that the laptop is 32 bit and therefore the install should have given an error? I cancelled the install before it did anything, but now I want to know if I need to download the iso again after purchasing the upgrade on my 32 bit laptop? I've read the answers to this question, which confirms what is said in this article - a 32 or 64 bit iso will be downloaded depending on the hardware of the computer you are upgrading. If that is the case, then why did it boot into the install screen?

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  • Why can't I create a Windows backup on my secondary disk?

    - by Brian Sullivan
    I've installed Windows 7 Ultimate on an SSD that I've added to the XPS desktop that I bought from Dell. I would like to use the built-in backup functionality to create incremental backups and store them on the large drive that came with the machine. I formatted the large drive and turned it into a Basic disk. However, when I try to set the backup location to the large internal disk (E:\) in the "Set up backup" wizard, a get a message saying, "A system image cannot be saved on a drive that your computer boots from or that Windows is installed on." Windows is not installed on that disk. I even deleted the OEM partition that was on the disk, and removed it completely from the boot order in the BIOS. Any clue why Windows is griping at me about this?

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  • Why are the external IP of my router not the same as the external IP of my computer

    - by Martin
    I have a standard network setup where all my network devices, both WIFI and ethernet, are connected to the same router. Lately, however, I've been experiencing some very strange behavior. It started as a simple connecting error, when I tried to reach an FTP server using the external IP. Of course I went right into one of those CheckMyIP sites, to double check the IP and it turned out to be correct. Then I went into my router setup, which is through a tool called aiport-tool, because I have an Apple Aiport Extreme router. Turns out the router displays a different external IP, and for some reason that external IP works when I try to access the FTP server. Can anyone explain what is going on? Why are the devices connected to the router displaying an incorrect external IP? BTW i have no VPN/proxy setups on any of my devices.

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  • Why is 'grep -i' so slow? How to do it faster for ASCII?

    - by Vi.
    Consider: $ time lzop -d < tvtropes-index.lzo | egrep -B 5 '[Dd][eE][sS][cC][eE][nN][dD] ?[Ff][rR][oO][mM]' real 0m0.438s $ time lzop -d < tvtropes-index.lzo | egrep -B 5 'descend ?from' -i real 0m11.294s Both search case insensitively. Why is the -i version so slow? How do I make grep -i fast without entering things like [iI][nN] [tT][hH][iI][sS] [wW][aA][Yy]? For example, perl -ne 'print if /descend ?from/i' works fast, but '-B 5' is not as trivial to implement as in grep (as well as other options).

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  • Why are the Volume and other indicators missing on my eMachines eM355?

    - by Propeller
    I just bought an eMachines eM355. The default installed OS is MeeGo so I installed Windows 7 into it instead. The problem, however, is that, the on-screen indicators have disappeared. The ones I'm talking about are the small dark boxes that appear at the bottom part of the screen when you, for example, press Fn + Up Arrow (to adjust volume). The same goes for the brightness adjusting and the rest of the Fn key combinations. The keys do work but I'd still prefer to see a prompt on the screen. Another reason why I want to solve this is because I can't effectively toggle the Bluetooth and Wifi since I don't get any prompts when pressing Fn + F3. I wanted to include a picture of what I'm looking for but I couldn't find the exact term for such.

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  • C++/CLI value class constraint won't compile. Why?

    - by Simon
    Hello, a few weeks ago a co-worker of mine spent about two hours finding out why this piece of C++/CLI code won't compile with Visual Studio 2008 (I just tested it with Visual Studio 2010... same story). public ref class Test { generic<class T> where T : value class void MyMethod(Nullable<T> nullable) { } }; The compiler says: Error 1 error C3214: 'T' : invalid type argument for generic parameter 'T' of generic 'System::Nullable', does not meet constraint 'System::ValueType ^' C:\Users\Simon\Desktop\Projektdokumentation\GridLayoutPanel\Generics\Generics.cpp 11 1 Generics Adding ValueType will make the code compile. public ref class Test { generic<class T> where T : value class, ValueType void MyMethod(Nullable<T> nullable) { } }; My question is now. Why? What is the difference between value class and ValueType?

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  • changing permissions for a network share takes longer on win2008 than on win2003, why is that?

    - by HugoRune
    Given a network share accessible for "everyone" in the domain, containing several 1000 files and folders When I change permissions for this share from read/write to only read (or vice versa) on windows 2003, the change takes effect instantly. When I do the same on a share on Windows 2008, the dialog stays open for a long time before closing when I click on OK, and the server appears to be accessing a lot of files. What is the reason for this delay? Does Windows 2008 also change ntfs permissions for all files inside the share? If so, why doesn't win2003 have to do that? I do not mind the delay, after all I do not have to change this stuff very often, but I am curious. What are the differences between 2003 and 2008 in this regard?

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