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How to check if array element exists or not in javascript?
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4
+1, nice. You can also use if(arrayName[index] === 'undefined') as a shortcut
– AnchovyLegend
Oct 8 '...
Get generic type of class at runtime
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answered Aug 4 '10 at 8:55
HenningHenning
14.8k33 gold badges4949 silver badges6565 bronze badges
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Use of def, val, and var in scala
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edited Apr 17 '11 at 4:46
Ying
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answered Dec 14 '10 at 15:...
Javascript reduce on array of objects
... the sum of the x properties of the parameters:
var arr = [{x:1},{x:2},{x:4}];
arr.reduce(function (a, b) {
return {x: a.x + b.x}; // returns object with property x
})
// ES6
arr.reduce((a, b) => ({x: a.x + b.x}));
// -> {x: 7}
Explanation added from comments:
The return value of each...
How do you reverse a string in place in JavaScript?
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answered Jun 6 '09 at 4:34
belacquabelacqua
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Display lines number in Stack Trace for .NET assembly in Release mode
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147
Go into the Properties window for the project where you want to see stack trace line numbers.
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How do I compare two strings in Perl?
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answered Jul 24 '09 at 1:34
Sinan ÜnürSinan Ünür
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Using git, how do I ignore a file in one branch but have it committed in another branch?
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84
This solution appears to work only for certain, patched versions of git. See a new answer poi...
How do I find all of the symlinks in a directory tree?
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edited Jun 4 '14 at 21:12
chris Frisina
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How to make lists contain only distinct element in Python? [duplicate]
... Mark ByersMark Byers
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