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mongo group query how to keep fields
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Why do you need {$first: '$age'} etc.? Is it possible to just have age: $age?
– lightalchemist
Dec 16 '17 at 8:04
5
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What is causing this error - “Fatal error: Unable to find local grunt”
...m with a package.json file to install grunt.js all any other grunt conribs etc.
– Henry
Oct 29 '14 at 23:54
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Early exit from function?
...is a 100% safe way to exit a method, even if the caller is bound to events etc?
– user603284
Jul 14 '11 at 22:11
@dbme...
Objective-C parse hex string to integer
...re lenient. Write thorough unit tests (include spaces, non-hex characters, etc..) as you will find some surprising edge cases that NSScanner gives you more control over.
– Quintin Willison
Mar 30 '17 at 14:15
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Check if inputs are empty using jQuery
... and map through the input. After years of dealing with fancy blur, focus, etc. tricks, keeping things simpler will yield more usability where it counts.
$('#signupform').submit(function() {
var errors = 0;
$("#signupform :input").map(function(){
if( !$(this).val() ) {
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How to remove duplicate white spaces in string using Java?
How to remove duplicate white spaces (including tabs, newlines, spaces, etc...) in a string using Java?
9 Answers
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How to specify an area name in an action link?
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If you can not use standart web aplication link like About, Home, Contac etc from area. You change lines
@Html.ActionLink("Ana Sayfa", "Index", "Home", new { area = "" }, new {})
from
Views\Shared_Layout.cshtml
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Getting a better understanding of callback functions in JavaScript
...ameters as necessary
callback();
}
A lot of libraries (jQuery, dojo, etc.) use a similar pattern for their asynchronous functions, as well as node.js for all async functions (nodejs usually passes error and data to the callback). Looking into their source code would help!
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CSS /JS to prevent dragging of ghost image?
...re confident the user will have JS, you only need to use the JS attribute, etc. For more flexibility, look into ondragstart, onselectstart, and some WebKit tap/touch CSS.
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Using ls to list directories and their total sizes
...re/coreutils/manual/… It's especially there for sorting 103K, 102M, 1.1G etc. This should be available on a lot of systems nowadays, but not all.
– Evgeni Sergeev
Dec 22 '14 at 9:12
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