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Understanding prototypal inheritance in JavaScript
...r.prototype.constructor === Car, but it is equally true for Array, Object, String, ...etc.
But if you reassign a different object to prototype, that invariance is broken. Usually this is not a problem (as you have noticed), but it is better to reinstate it, because it answers the question "Which c...
What is Rack middleware?
...of them will do. Let's create a simple web application that returns a JSON string. For this we'll create a file called config.ru. The config.ru will automatically be called by the rack gem's command rackup which will simply run the contents of the config.ru in a rack-compliant webserver. So let's ad...
PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...dn't use anything in any attribute without escaping with htmlspecialchars($string, ENT_QUOTES), so there's nothing special about server variables there.
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What does the star operator mean, in a function call?
...e for any beginning programmer. In Python, a beginner can write def printf(string_template, *args) and move on.
– IceArdor
Nov 20 '13 at 7:38
1
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Best Practice for Exception Handling in a Windows Forms Application?
...) per thread
Generic Exceptions caught should be published
Log Exception.ToString(); never log only Exception.Message!
Don't catch (Exception) more than once per thread
Don't ever swallow exceptions
Cleanup code should be put in finally blocks
Use "using" everywhere
Don't return special values on er...
How is the java memory pool divided?
...able state necessary for the JVM to run, such as class definitions and the String constant pool. Note that the PermGen space is planned to be removed from Java 8, and will be replaced with a new space called Metaspace, which will be held in native memory.
reference：http://www.programcreek.com/2013...
How to check file MIME type with javascript before upload?
...r = "";
for(var i = 0; i < arr.length; i++) {
header += arr[i].toString(16);
}
console.log(header);
// Check the file signature against known types
};
fileReader.readAsArrayBuffer(blob);
You can then determine the real MIME type like so (more file signatures here and here):
swit...
Haskell: How is pronounced? [closed]
...ut it makes a fine Applicative, in which case (<*>) becomes a way of stringing together a generalized version of zipWith, so perhaps we can imagine calling it fzipWith?
This zipping idea actually brings us full circle. Recall that math stuff earlier, about monoidal functors? As the name sug...
What exactly are iterator, iterable, and iteration?
... ITERABLE is:
anything that can be looped over (i.e. you can loop over a string or file) or
anything that can appear on the right-side of a for-loop: for x in iterable: ... or
anything you can call with iter() that will return an ITERATOR: iter(obj) or
an object that defines __iter__ that retur...
Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
...(out y))
y = 10;
return y;
}
static void Main(string[] args)
{
var result = N(new EvilBool());
// Prints 3!
Console.WriteLine(result);
}
}
class EvilBool
{
private bool value;
public static bool operator true(EvilBool b)
{
...