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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: permuting a JS vector
Date: Sun, 31 May 2015 22:42:40 +0100
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dr.mtarver@gmail.com writes:

> On Sunday, May 31, 2015 at 8:27:22 PM UTC+1, Ben Bacarisse wrote:
<snip>
>>[...]  The push function returns the new array length,
>> not an array.  This last one is why you get the error.
>> 
> ah - a side-effect function then - that mutates an array but returns
> number?

Yes.  You'll need a reference if you are learning JavaScript as you
can't really guess.  For example:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push

-- 
Ben.