33

If I have array, for example:

a = ["a", "b", "c"]

I need something like

a.remove("a");

How can I do this?

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2
  • Settle Down. I'm coming up with a duplicate for you since you clearly didn't search for yourself. Commented Jun 7, 2012 at 22:20
  • arr.splice(arr.indexOf(elm),1) will remove an element 'elm' from array 'arr' Commented Aug 21, 2018 at 19:34

6 Answers 6

Reset to default
16 
var newArray = [];
var a=["a","b","c"];
for(var i=0;i<a.length;i++)
    if(a[i]!=="a") 
        newArray.push(a[i]);

As of newer versions of JavaScript:

var a = ["a","b","c"];
var newArray = a.filter(e => e !== "a");
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4 Comments

You know there is .splice right?
Yes, I know. But I'm considering that the array can have more than one "a"
I didn't think of that. Good point. +1
The array has only unique values !
7 
remove = function(ary, elem) {
    var i = ary.indexOf(elem);
    if (i >= 0) ary.splice(i, 1);
    return ary;
}

provided your target browser suppports array.indexOf, otherwise use the fallback code on that page.

If you need to remove all equal elements, use filter as Rocket suggested:

removeAll = function(ary, elem) {
    return ary.filter(function(e) { return e != elem });
}
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3

If you're using a modern browser, you can use .filter.

Array.prototype.remove = function(x){
    return this.filter(function(v){
        return v !== x;
    });
};

var a = ["a","b","c"];
var b = a.remove('a');
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2

I came up with a simple solution to omit the necessary element from the array:

<script>
    function myFunction()
    {
        var fruits = ["One", "Two", "Three", "Four"];

        <!-- To drop the element "Three"-->
        <!-- splice(elementid, number_of_element_remove) -->
        fruits.splice(2, 1);

        var x = document.getElementById("demo");
        x.innerHTML = fruits;
    }
</script>
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1 Comment

this is valid for Array and arraylist both
1 
let xx = ['a','a','b','c'];  // Array
let elementToRemove = 'a';  // Element to remove
xx =xx.filter((x) => x != elementToRemove) // xx will contain all elements except 'a'
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0

If you don't mind the additional payload (around 4 kB minified and gzipped) you could use the without function of the Underscore.js library:

_.without(["a", "b", "c"], "a");

Underscore.js would give you this function + a lot of very convenient functions.

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