CODEWITHSUNDEEP
javascriptvariable-assignment
gloomy.penguin
gloomy.penguin

Reputation: 5911

Clarification about variable assignment? "var x = !0"

I am going through a javascript library and I would like to know why you would define a variable like this...

points: {
   show: !0
},

Why would you do show: !0 instead of just show: 1?

I don't think this question is necessarily specific to javascript but I tagged the question with it anyway just in case it was actually something language specific.

Upvotes: 1

Views: 60

Answers (2)

SLaks
SLaks

Reputation: 887449

In Javascript, ! with any falsy value returns true.
This is a common trick used by minifiers to save two character.s

Upvotes: 6

BenM
BenM

Reputation: 4278

That evaluates to true. Not quite sure why it's being used as there's no context so that's all I can tell you.

Upvotes: 1

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