Where are the short-circuiting operators in ActionScript/JavaScript?

Question

Like VB has operators AndAlso and OrElse, that perform short-circuiting logical conjunction, where can equivalent operators be found in JS / AS?

Matthew Crumley · Accepted Answer · 2009-01-28 06:55:38Z

2

The normal && and || operators do short circuit evaluation.

answered Jan 28, 2009 at 6:55

Matthew Crumley

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Jonathan Lonowski · Accepted Answer · 2009-01-28 06:58:06Z

1

From what I gather, JS and AS use short-circuiting by default.

Defaults might be a good example:

var value = input || false;  // defaults: non-zero `input` or `false`

Ternary is another -- only the block needed is executed:

return typeof(value) == 'string' ? value.substr(0, 2) : '';

answered Jan 28, 2009 at 6:58

Jonathan Lonowski

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2 Comments

GeoffreyF67 Over a year ago

The ternary is an evil eveeeel statement that should be avoided at all costs imo. Just too freaking hard to read! I've lost count of the number of bugs I've found in code because someone thought they'd be cute and use the ternary...

user210757 Over a year ago

i disagree. ternary operators are straightforward, simple, and concise.

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