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What do two question marks together mean in C#?
...e following statement will assign the first non-null Answer# to Answer (if all Answers are null then the Answer is null):
string Answer = Answer1 ?? Answer2 ?? Answer3 ?? Answer4;
Also it's worth mentioning while the expansion above is conceptually equivalent, the result of each expression is o...
When is CRC more appropriate to use than MD5/SHA1?
...from network interference, line noise, distortion, etc.
CRC is computationally much less complex than MD5 or SHA1. Using a hash function like MD5 is probably overkill for random error detection. However, using CRC for any kind of security check would be much less secure than a more complex hashing ...
Android Drawing Separator/Divider Line in Layout?
... of other items like TextView. Is there a good widget for this. I don't really want to use an image as it would be hard to match the other components to it. And I want it to be relatively positioned as well. Thanks
...
How to programmatically clear application data
...st). In order to do so, I need to clear the app data. This can be done manually in Settings/Applications/Manage Applications/[My App]/Clear data
...
Prevent browser from loading a drag-and-dropped file
...
You can add a event listener to the window that calls preventDefault() on all dragover and drop events.
Example:
window.addEventListener("dragover",function(e){
e = e || event;
e.preventDefault();
},false);
window.addEventListener("drop",function(e){
e = e || event;
...
How to ignore whitespace in a regular expression subject string?
...ld do the trick:
/c(?:\n\s*)?a(?:\n\s*)?t(?:\n\s*)?s/
See this page for all the different variations of 'cats' that this matches.
You can also solve this using conditionals, but they are not supported in the javascript flavor of regex.
...
What is the maximum length of a Push Notification alert text?
... thing the documentation says is:
In iOS 8 and later, the maximum size allowed for a notification payload is 2 kilobytes; Apple Push Notification Service refuses any notification that exceeds this limit. (Prior to iOS 8 and in OS X, the maximum payload size is 256 bytes.)
This is what I could ...
Get index of selected option with jQuery
... seem to work in the browsers that I tested, but the option tags doesn't really correspond to actual elements in all browsers, so the result may vary.
Just use the selectedIndex property of the DOM element:
alert($("#dropDownMenuKategorie")[0].selectedIndex);
Update:
Since version 1.6 jQuery ha...
How can I check that a form field is prefilled correctly using capybara?
...de. The first way is to be preferred unless you are trying this on a statically generated form.
– fqxp
May 16 '13 at 10:07
1
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git cherry-pick not working
...
Git is resolving the cherry-pick as a no-op -- all of the changes introduced by that commit have been introduced by some commit on your current branch. (Or that's what Git thinks, anyway.) Verify that the commit you are cherry-picking hasn't already been merged somehow,...