I've seen the operator |= in a jQuery plugin, in the following line:
if (e.ctrlKey) mod |= 1;
How it works? Is it a good practice to use it?
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David Collado
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1https://msdn.microsoft.com/en-us/library/ie/81bads72%28v=vs.94%29.aspx – Matthew Mcveigh Apr 08 '15 at 16:21
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2A good place to start is the [docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Bitwise_OR_assignment) :) – Jason Cust Apr 08 '15 at 16:21
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1Bitwise OR operator. Looks like shorthand for `mod = mod | 1` – Johan Apr 08 '15 at 16:22
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Look at all these reference links...wow what a little bit of searching turns up. Try a little bit of research before asking – charlietfl Apr 08 '15 at 16:23
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2duplicate: http://stackoverflow.com/q/12854644/211627 – JDB Apr 08 '15 at 16:24
1 Answers
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The | operator is a bitwise OR. It essentially performs a logical OR operation on corresponding pairs of bits in its arguments. If any bit is 1, the resulting bit is also 1. E.g.:
00101
| 10100
= 10101
a |= b is simply shorthand for a = a | b, similar to several other binary operators in JavaScript.
It is often useful for setting binary configuration flags.
George Bahij
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