A Reintroduction to JavaScript

Re:A Reintroduction to JavaScript by babuskov on Monday February 03, 2014 @07:15AM (#7170217)

Since I started using JS heavily lately, it's nice to be reminded of some things. Thanks for posting.

One question though, it says:

    If you want to append an item to an array, the safest way to do it is like this:
    a[a.length] = item;  // same as a.push(item);

a.push() variant seems more elegant to me. Why is a[] variant "safer"?

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Re:A Reintroduction to JavaScript by bpierre on Monday February 03, 2014 @07:39AM (#7170311)

It must be for the compatibility, Array.prototype.push() has been added to IE 5.5:

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Re:A Reintroduction to JavaScript by cstuder on Monday February 03, 2014 @07:43AM (#7170321)

Thirteen years ago... I would argue that you could use a.push() safely now.

So, why should a[a.length] be safer?

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Re:A Reintroduction to JavaScript by coldtea on Monday February 03, 2014 @10:52AM (#7171230)

He said it already, JUST for the compatibility. No other reason compared to push nowadays.

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Re:A Reintroduction to JavaScript by unstabilo on Monday February 03, 2014 @08:22AM (#7170460)

Both methods are equally safe, what the author meant is that both are safer than a[14] = item or a[myCounter] = item.

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