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Why covariance and contravariance do not support value type
...he values. References all look the same - so you can use an IEnumerable<string> as an IEnumerable<object> without any change in representation; the native code itself doesn't need to know what you're doing with the values at all, so long as the infrastructure has guaranteed that it will ...
Loop code for each file in a directory [duplicate]
...returns the type of the file. Thereby possible results would be file, dir, char, block, .... You can use something like mime_content_type() if you want to know the content type of the file.
– vallentin
Jul 24 '15 at 9:08
...
Deleting Objects in JavaScript
... of them would cause a crash. To make them all turn null would mean having extra work when deleting or extra memory for each object.)
Since Javascript is garbage collected, you don't need to delete objects themselves - they will be removed when there is no way to refer to them anymore.
It can be ...
How to change colors of a Drawable in Android?
...
If you want to use a color resource rather than a string (#ff0000 etc), you can use e.g. int iColor = getResources().getColor(R.color.primary)
– Ben Clayton
Aug 20 '14 at 15:02
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ITunes review URL and iOS 7 (ask user to rate our app) AppStore show a blank page
....apple.com/app/id353372460
Notice the id in front of the number ... that string is is id353372460, not just 353372460
For anything pre iOS7 the 'old' URL needs to be used, only those could get you straight to the review page. You should also take note that these calls will only work on devices. R...
How to get the day of week and the month of the year?
...,no. Just use the standard javascript Date class. No need for arrays or an extra library. See my answer: stackoverflow.com/a/50293232/760777
– RWC
May 11 '18 at 13:20
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simple HTTP server in Java using only Java SE API
...t.httpserver.HttpServer;
public class Test {
public static void main(String[] args) throws Exception {
HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
server.createContext("/test", new MyHandler());
server.setExecutor(null); // creates a default e...
Rails: Is there a rails trick to adding commas to large numbers?
...
Sure, it reverses the string, then adds a comma after any sequence of 3 digits that is also followed by another digit, then reverses it back.
– pguardiario
Feb 22 '13 at 0:04
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Use jQuery to change an HTML tag?
...t;, [withDataAndEvents], [withDataAndEvents])
Arguments:
tagName: String
The tag name e.g. "div", "span", etc.
withDataAndEvents: Boolean
"A Boolean indicating whether event handlers should be copied along with the elements. As of jQuery 1.4, element data will be copied as we...
What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...iving a value like *.c does not entail any expansion. It is only when this string is used by a command that it will maybe trigger some globbing. Similarly, a value like $(wildcard *.c) or $(shell ls *.c) does not entail any expansion and is completely evaluated at definition time even if we used := ...