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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
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Sadly for short arrays the answer is vastly different. For example cloning an array of listeners before calling each of them. Those arrays are often small, usually 1 element.
– gman
Feb 13 '15 at 2:05
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How to define a circle shape in an Android XML drawable file?
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No need for the size in the shape if you later define a square size for the view.
– Ferran Maylinch
Nov 25 '15 at 17:58
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What is the difference between ng-app and data-ng-app?
I have begun to learn about AngularJS and am confused about what the differences are between the ng-app and data-ng-app directives.
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Strip whitespace from jsp output
...utput? Is there a switch I can flip on my web.xml? Is there a Tomcat specific setting?
9 Answers
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JavaScript % (modulo) gives a negative result for negative numbers
... The modulo operation is not very well defined over negative numbers, and different computing environments handle it differently. Wikipedia's article on the modulo operation covers it pretty well.
– Daniel Pryden
Dec 17 '10 at 4:08
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Can't compare naive and aware datetime.now()
...e_start)
challenge.datetime_end = utc.localize(challenge.datetime_end)
# now both the datetime objects are aware, and you can compare them
Note: This would raise a ValueError if tzinfo is already set. If you are not sure about that, just use
start_time = challenge.datetime_start.replace(tzinfo=...
Is there a naming convention for git repositories?
...ncatenated words are hard to understand. I know, I'm German. "Donaudampfschifffahrtskapitänspatentausfüllungsassistentenausschreibungsstellenbewerbung."
"_" is harder to type than "-"
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What is “Orthogonality”?
...t instruction happens (very important for debugging).
There is also a specific meaning when referring to instruction sets.
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Swift: Pass array by reference?
I want to pass my Swift Array account.chats to chatsViewController.chats by reference (so that when I add a chat to account.chats , chatsViewController.chats still points to account.chats ). I.e., I don't want Swift to separate the two arrays when the length of account.chats changes.
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How do you check if a JavaScript Object is a DOM Object?
...t. This code is tested in FF3, IE7, Chrome 1 and Opera 9).
//Returns true if it is a DOM node
function isNode(o){
return (
typeof Node === "object" ? o instanceof Node :
o && typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName==="string"
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