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best way to get the key of a key/value javascript object
If I have a JS object like:
18 Answers
18
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What's the difference between globals(), locals(), and vars()?
What is the difference between globals() , locals() , and vars() ? What do they return? Are updates to the results useful?
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How to get filename without extension from file path in Ruby
How can I get the filename from a file path in Ruby?
9 Answers
9
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What is the difference between an int and an Integer in Java and C#?
...More Joel on Software when I came across Joel Spolsky saying something about a particular type of programmer knowing the difference between an int and an Integer in Java/C# (Object-Oriented Programming Languages).
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Can you change what a symlink points to after it is created?
...ystem call — not command line program) to change the pathname referenced by a symbolic link (symlink) — other than by unlinking the old one and creating a new one?
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Using jQuery how to get click coordinates on the target element
...es you the relative Position of an element i.e.,
consider an element is embedded inside another element
example :
<div id="imParent">
<div id="imchild" />
</div>
Ref : http://api.jquery.com/position/
HTML
<body>
<div id="A" style="left:100px;"> Default ...
How to determine if a point is in a 2D triangle? [closed]
...ite optimal) algorithm is checking on which side of the half-plane created by the edges the point is.
Here's some high quality info in this topic on GameDev, including performance issues.
And here's some code to get you started:
float sign (fPoint p1, fPoint p2, fPoint p3)
{
return (p1.x - p3...
Lambda function in list comprehensions
...e following two list comprehensions different, even though f and the lambda function are the same?
6 Answers
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Ruby send vs __send__
I understand the concept of some_instance.send but I'm trying to figure out why you can call this both ways. The Ruby Koans imply that there is some reason beyond providing lots of different ways to do the same thing. Here are the two examples of usage:
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Checking if a double (or float) is NaN in C++
...isons involving them are always false. That is, for a float f, f != f will be true only if f is NaN.
Note that, as some comments below have pointed out, not all compilers respect this when optimizing code.
For any compiler which claims to use IEEE floating point, this trick should work. But I ca...