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What do two question marks together mean in C#?
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It's the null coalescing operator, and quite like the ternary (immediate-if) operator. See also ?? Operator - MSDN.
FormsAuth = formsAuth ?? new FormsAuthenticationWrapper();
expands to:
FormsAuth = formsAuth != null ? formsAuth : new FormsAuthenticationWr...
Select something that has more/less than x character
...e documentation:
http://www.techonthenet.com/oracle/functions/length.php
And here is the mySQL Documentation of Length(string):
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_length
For PostgreSQL, you can use length(string) or char_length(string). Here is the PostgreSQL d...
Finding the max value of an attribute in an array of objects
I'm looking for a really quick, clean and efficient way to get the max "y" value in the following JSON slice:
13 Answers
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Nginx Different Domains on Same IP
...y server {} blocks, the sever_name directives were wildcards: .domain1.com and .domain2.com. Changing them to server_name www.domain1.com domain1.com; and server_name www.domain2.com domain2.com; now has the correct page for each site displaying when those addresses are used.
–...
How do I find the stack trace in Visual Studio?
... would be nice for it to show the callers of the objects that throws an unhandled exception. Is there a hidden option to make it useful? Perhaps you can expand on your answer to provide examples.
– James
Jan 16 '15 at 16:43
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Which Radio button in the group is checked?
...f the radio buttons be directly in the same container (eg, Panel or Form), and that there is only one group in the container. If that is not the case, you could make List<RadioButton>s in your constructor for each group, then write list.FirstOrDefault(r => r.Checked).
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jQuery select2 get value of select tag?
... $("#first").val(); will return 1,2,3 (which ever is selected) and can you post the code in function select2() for more details.
– somesh
Nov 11 '13 at 14:40
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Hex representation of a color with alpha channel?
Is there a W3 or any other noteworthy standard on how to represent a color (including alpha channel) in hex format?
5 Answe...
Changing an element's ID with jQuery
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Don't you need to detach the element from the DOM and replace it with a new element with a new ID in it's place? To avoid breaking the DOM ...?
– cllpse
Dec 8 '08 at 13:09
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Resetting a setTimeout
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You can store a reference to that timeout, and then call clearTimeout on that reference.
// in the example above, assign the result
var timeoutHandle = window.setTimeout(...);
// in your click function, call clearTimeout
window.clearTimeout(timeoutHandle);
// then ...