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How to declare a global variable in JavaScript?
...e name), doing so generates an implicit global, which is a bad thing to do and would generate an error in strict mode.
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Android encryption / decryption using AES [closed]
Is there a good example of how to encrypt and decrypt image and other files with AES on Android?
11 Answers
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foldl versus foldr behavior with infinite lists
...r folding a list of n values [x1, x2, x3, x4 ... xn ] with some function f and seed z.
foldl is:
Left associative: f ( ... (f (f (f (f z x1) x2) x3) x4) ...) xn
Tail recursive: It iterates through the list, producing the value afterwards
Lazy: Nothing is evaluated until the result is needed
Backw...
Gradle proxy configuration
...e causes for issues, I manually add the Artifactory plugin in build.gradle and run it from command line:
14 Answers
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Installing PG gem on OS X - failure to build native extension
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Same error for me and I didn't experience it until I downloaded OS X 10.9 (Mavericks). Sigh, another OS upgrade headache.
Here's how I fixed it (with homebrew):
Install another build of Xcode Tools (typing brew update in the terminal will p...
How to initialize static variables
...nit()
{
self::$bar = array(…);
}
}
Foo::init();
PHP 5.6 can handle some expressions now.
/* For Abstract classes */
abstract class Foo{
private static function bar(){
static $bar = null;
if ($bar == null)
bar = array(...);
return $bar;
}
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Problems with DeploymentItem attribute
...taining an "old" system written in C#.net, removing some obsolete features and doing some refactoring. Thanks god, the previous guy wrote some unit tests (MSTests). I quite comfortable with JUnit tests, but didn't do yet much with MSTests.
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HTML text input field with currency symbol
... to have a text input field containing the "$" sign in the very beginning, and no matter what editing occurs to the field, for the sign to be persistent.
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Using semicolon (;) vs plus (+) with exec in find
...+), as many filenames as possible are passed as arguments to a single command:
ls file1 file2 file3
The number of filenames is only limited by the system's maximum command line length. If the command exceeds this length, the command will be called multiple times.
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What is the difference between Caching and Memoization?
I would like to know what the actual difference between caching and memoization is.
As I see it, both involve avoiding repeated function calls to get data by storing it .
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