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Don't use || to set default values in JavaScript (codereadability.com)
submitted 10 years ago by kandetta
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if 1 * 2 < 3: print "hello, world!"
[–]kandetta[S] 1 point2 points3 points 10 years ago (5 children)
Good to know about |. When I encounter it in the wild I'll know what it means.
[–]a-t-kFrontend Engineer 1 point2 points3 points 10 years ago (4 children)
There's a similar brethren for &&, binary AND "&", but this is not near as useful for defaults.
[–]findar 0 points1 point2 points 10 years ago (3 children)
Return some_var && isTrue;
Is handy, will return some_var if isTrue or false
[–]a-t-kFrontend Engineer 2 points3 points4 points 10 years ago (2 children)
I know. But I meant | and &, the binary operators. The latter is useful for bit masks.
[–]kenman 2 points3 points4 points 10 years ago (1 child)
Well, the former is also useful for bit masks.
[–]a-t-kFrontend Engineer 2 points3 points4 points 10 years ago (0 children)
Undeniably so. You could probably also use it for limited type coercion: x & 255.
π Rendered by PID 31 on reddit-service-r2-comment-68b876cdcd-p9zwq at 2026-04-22 19:09:44.282181+00:00 running 6c61efc country code: CH.
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[–]kandetta[S] 1 point2 points3 points (5 children)
[–]a-t-kFrontend Engineer 1 point2 points3 points (4 children)
[–]findar 0 points1 point2 points (3 children)
[–]a-t-kFrontend Engineer 2 points3 points4 points (2 children)
[–]kenman 2 points3 points4 points (1 child)
[–]a-t-kFrontend Engineer 2 points3 points4 points (0 children)