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What is the difference between string primitives and String objects in JavaScript?
...JavaScript has two main type categories, primivites and objects.
var s = 'test';
var ss = new String('test');
The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a ...
How to run a PowerShell script
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Type:
powershell -executionpolicy bypass -File .\Test.ps1
NOTE: Here Test.ps1 is the PowerShell script.
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Min/Max of dates in an array?
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Code is tested with IE,FF,Chrome and works properly:
var dates=[];
dates.push(new Date("2011/06/25"))
dates.push(new Date("2011/06/26"))
dates.push(new Date("2011/06/27"))
dates.push(new Date("2011/06/28"))
var maxDate=new Date(Math...
Override Java System.currentTimeMillis for testing time sensitive code
...ncy injection, but even if you used a replaceable singleton you would gain testability.
This could almost be automated with search and replace for the singleton version:
Replace Calendar.getInstance() with Clock.getInstance().getCalendarInstance().
Replace new Date() with Clock.getInstance().newD...
Test a weekly cron job [closed]
...er the script will actually work when run from cron. Use the excellent crontest script in one of the other answers to this question.
– andynormancx
Apr 24 '16 at 14:38
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Casting to string in JavaScript
... at all defined, you will still get an error for String(). Example: String(test); throws Uncaught ReferenceError: test is not defined, while var test; String(test); will result in "undefined".
– Anthony
Sep 22 '17 at 20:07
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#ifdef replacement in the Swift language
... usual, you can set a different value when in Debug or when in Release.
I tested it in real code and it works; it doesn't seem to be recognized in a playground though.
You can read my original post here.
IMPORTANT NOTE: -DDEBUG=1 doesn't work. Only -D DEBUG works. Seems compiler is ignoring a f...
Structure padding and packing
... 2 structs could be used by non-struct variables that could fit in.
e.g in test_struct_address() below, the variable x resides between adjacent struct g and h.
No matter whether x is declared, h's address won't change, x just reused the empty space that g wasted.
Similar case for y.
Example
(fo...
Difference between float and double in php?
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In PHP 7.0.14
function test(double $a) {
var_dump($a);
}
test(2.2111);
Returns "Fatal error: Uncaught TypeError: Argument 1 passed to test() must be an instance of double, float given".
function test(float $a) {
var_dump($a);
}
test(2.2...
Flattening a shallow list in Python [duplicate]
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An explicit loop that uses .extend method is the fastest solution according to this benchmark
– jfs
Apr 30 '14 at 2:02
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