Documentation Request - Javascript

Question

Team,

Where can I find documentation regarding the left side of the equation of the below JavaScript Code:

var [a, b, c] = "10-11-12".split('-');

Result:
a = 10
b = 11
c = 12
// Note: this is used in Google Apps Script

Apps Script UI Example

Thanks!

That is no JavaScript, at least in 1.6 and under. Run it in a browser: SyntaxError: Unexpected token [. Nothing like making a language act like others. Yikes. — epascarello
– epascarello, Commented Nov 22, 2012 at 3:44
Why is this getting voted down? This is valid in JavaScript 1.7. — maček
– maček, Commented Nov 22, 2012 at 3:45

maček · Accepted Answer · 2012-11-22 03:43:57Z

10

This is called destructuring assignment

NOTE it's only available if your runtime is >= JavaScript 1.7

answered Nov 22, 2012 at 3:43

maček

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2 Comments

maček Over a year ago

@ChristopherMartin, that's not what the question is, though. The OP is simply looking for documentation regarding this new feature; OP said nothing about implementing/using it.

Chris Martin Over a year ago

Just thought it was worth mentioning.

Tim Ferrell · Accepted Answer · 2012-11-22 03:52:07Z

1

Mozilla Developer Network has some great documentation on the split method: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String/split

edited Nov 22, 2012 at 3:52

answered Nov 22, 2012 at 3:44

Tim Ferrell

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7 Comments

maček Over a year ago

He's asking about the destructing assignment, not the .split() method.

Tim Ferrell Over a year ago

@macek Where does he state that?

maček Over a year ago

@TFerrell, I suppose I'm making an assumption based on the amount of help/documentation you'd get searching for "javascript split method"...

Chris O'Kelly Over a year ago

it is implied by him tagging variables declaration

nnnnnn Over a year ago

@ChrisO'Kelly - With no offense implied or intended for propjk007, who used the right tags here, I'll eat my hat if the day ever comes that we can depend on everybody to tag their questions correctly. (But yes, I too assumed the question was about the assignment syntax, since .split() is pretty easy to Google.)

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