what is ||= in ruby?

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What does ||= mean in Ruby?

Why two votes to reopen? It's clearly a duplicate. – sepp2k Oct 15 '10 at 20:31 — sepp2k, Oct 15 '10 at 20:31
Oh my god... this question again... Are they joking? – Nakilon Oct 15 '10 at 20:46 — Nakilon, Oct 15 '10 at 20:46

Russ Cam · Answer 1 · 2010-10-15T20:15:47.657

0

It's a conditional assignment. If the variable is nil or false it will be replaced with the value on the right hand side; if it already has a value other than nil or false it will keep that value.

edited Oct 15 '10 at 20:15

answered Oct 15 '10 at 20:10

Russ Cam

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Oops. Counter-example: `x = false; x ||= 42; x` – Oct 15 '10 at 20:14
Oops, I missed out the `false` part. Corrected, thanks :) – Russ Cam Oct 15 '10 at 20:18

what is ||= in ruby?

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