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  • Why MyModel.all works in Rails ?

    - by AntonAL
    Hi, i don't understand this little thing: Suppose, we have "Person" model class Person < ActiveRecord::Base end Why Person.all works ? Person.all.each { |p| do_something } This syntax tells us, that we have Person class-object instanciated somewhere ? Or is it some convention over configuration case ?

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  • Why is Visual Basic bad?

    - by Mike
    Why do programmers consider Visual Basic a bad language? Putting aside any gripes with Microsoft or with proprietary/non-free software in general, and looking the language itself. Syntax, style, etc. I have just started using it, and find the syntax rather terrible. But I'm wondering what are the most common specific problems.

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  • Why does Int32.MaxValue * Int32.MaxValue == 1 ???

    - by Greg Balajewicz
    OK, I know, Int32.MaxValue * Int32.MaxValue will yield a number larger than Int32 BUT, shouldn't this statement raise some kind of an exception? I ran across this when doing something like IF (X * Y Z) where all are Int32. in X and Y are sufficiently large enough, you get a bogus value from X*Y Why is this so and how to get around this? besides casting everything to int64

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  • why do ppl hate java ?

    - by dfafa
    so today in my Java class.... someone bluntly stated today, it's piece of ** and the professor laughed too. some girl said she's slower in coding because of Java.... why such hatred for Java ?

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  • why doesn't everyone use RAD tools?

    - by Sorskoot
    RAD tools like Clarion and WinDev claim to be 10x to 20x times faster in development and users of these tools claim the same. If that is thru, why are there so few people using these tools? if an application is made in 40 hours instead of 400 you would make a lot more money, right?

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  • Why is my keyboard messed up in Eclipse?

    - by Xi
    Hi there: I am trying to type in a pair of angle brackets in Eclipse, like "<". However it shows up as a single quotation and a dot, like "'.". I tried a couple of times and found out that the angle bracket is actually located at back-slash's position. Why is this happening? How can I change it back? Thanks in advance. Xi

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  • Why is this code's execution speed so different?

    - by Steve Watkins
    In Internet Explorer 7, this code executes consistently in 47 ms: function updateObjectValues() { $('.objects').html(12345678); // ~500 DIVs } however, this code executes consistently in 157 ms: function updateObjectValues() { $('.objects').html('12345678'); // ~500 DIVs } Passing a number is over 3x faster than a string. Why are these results so dramatically different? And, is there any way to help the performance of the string?

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  • How to show why "try" failed in python

    - by calccrypto
    is there anyway to show why a "try" failed, and skipped to "except", without writing out all the possible errors by hand, and without ending the program? example: try: 1/0 except: someway to show "Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> 1/0 ZeroDivisionError: integer division or modulo by zero" i dont want to doif:print error 1, elif: print error 2, elif: etc.... i want to see the error that would be shown had try not been there

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  • Why is FLT_MIN equal to zero?

    - by Nick Forge
    limits.h specifies limits for non-floating point math types, e.g. INT_MIN and INT_MAX. These values are the most negative and most positive values that you can represent using an int. In float.h, there are definitions for FLT_MIN and FLT_MAX. FLT_MAX is equal to a really large number, as you would expect, but why does FLT_MIN equal zero?

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  • Why doesn't $("#RadioButtons:checked").val() work in IE?

    - by Randy Heaps
    Why doesn't $("#RadioButtons:checked").val() - id selector - work in Internet Explorer but $("input:radio[name='RadioButtons']:checked").val() - name selector - does? <input name="RadioButtons" id="RadioButtons" type="radio" value="1" checked> <input name="RadioButtons" id="RadioButtons" type="radio" value="2"> <script> alert($("#RadioButtons:checked").val()); alert($("input:radio[name='RadioButtons']:checked").val()); </script>

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  • Why IE6 is messing the menu?

    - by Nitz
    Hey Guys, I had made website. This is Link for that. There is one menu in this site which works well in Firefox , Chrome, Opera. But it is messed in the IE 6. I want to know why is not showing correctly?

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  • jqTouch - why does the transition has no animation?

    - by teepusink
    Hi, I'm using jqTouch. Trying to figure out why when the scene / div change, it just change abruptly without the slide animation? Here is the setting that I have now: var jQT = new $.jQTouch({ slideSelector: '.link', useAnimations: true }); Again the scene change works just fine, just that I don't see the slide animation. What am I missing? Thanks, Tee

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  • How to figure out why .NET app runs at 32-bit on a 64-bit machine

    - by user54064
    I have a .NET app (webforms - .NET 3.5) that is running on a 64-bit server as 32-bit (I checked the IntPtr.Size result). The compilation is set to AnyCPU so I would expect that on a 64-bit machine, the app would be run at 64-bit. There are many Third-party programs incorporated into the app, could they be causing a problem? How do I figure out why 64-bit compilation is not being done?

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  • Why do garbage collectors freeze execution?

    - by Martin
    I was thinking about garbage collection on the way home, and I began wondering, why does the garbage collector totally freeze execution of a program? Personally I would have designed it to block any threads which try to allocate a new object, but threads which were running would be left alone. I can't imagine any situation where this would be a problem compared to how a garbage collector currently works.

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  • Why is this <p> expanding the whole page?

    - by George Edison
    If you visit this page and shrink your browser window, you will see my problem. [If you want to open the page in a new window, just hold down shift when you click the link.] The answers to the question extend beyond the page margin instead of wrapping. I have spent the last half hour working with Chrome's Inspector and Firefox's DOM inspector - all to no avail. I just cannot figure out why it's doing this.

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