Javascript array holds remove function

Question

I am using a an array called "workingLinks", in my javascript function first I define the array as

workingLinks = [];

Then I use console

console.log(workingLinks);

Now the console displays as

[remove: function] ;

here if i use a for loop it is iterating over the function which i don't want. If I create an array in console then it works fine, shows [] as expected. Anybody have the idea of how the array holds remove function?

Looks like you or your frameworrk added a remove method to the Array prototype. — lxg
– lxg, Commented Oct 4, 2014 at 20:44
yes I am using d3 framework with other few libraries, how to remove this temporarily? — Shebin Mathew
– Shebin Mathew, Commented Oct 4, 2014 at 20:47
D3 itself doesn't appear to be the culprit: jsfiddle.net/aqa60c43/2. Check your other libraries if they mess with the Array prototype. — lxg
– lxg, Commented Oct 4, 2014 at 20:49
I wouldn't recommend this, since the remove function is probably being used elsewhere, but try: delete Array.prototype.remove — tewathia
– tewathia, Commented Oct 4, 2014 at 20:51

Madara's Ghost · Accepted Answer · 2014-10-04 21:59:10Z

2

I don't know about the remove function, the guys in the comments were pretty helpful.

However, you can simply iterate an array with the forEach function like so:

arr.forEach(functionToRunForEachElement);

It also accepts anonymous functions:

arr.forEach(function(element, index, originalArray) {
   //Do stuff here
});

There are also .map and .reduce to perform common actions like mapping all the values of the array to something else, or reduce the array of values into a single value.

answered Oct 4, 2014 at 21:59

Madara's Ghost

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1 Comment

Nicholas Cloud Over a year ago

Note that forEach will only work in browsers that support ES5, but you can find shims for older browsers, or use a libraries like underscore and lodash, which have an each utility method that works on arrays.

Nicholas Cloud · Accepted Answer · 2014-10-04 21:09:02Z

1

Something has modified the Array prototype. I tried this in Chrome:

Array.prototype.remove = function () {};
> function () {}
console.log([]);
> [remove: function]

What other libraries are you using?

answered Oct 4, 2014 at 21:09

Nicholas Cloud

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