I have an array:
arr = ["a","b","c"];
How could I do in order to remove value "c" and then return array ["a","b"]?
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See slice() and splice().Roman Hocke– Roman Hocke2014-03-16 08:00:02 +00:00Commented Mar 16, 2014 at 8:00
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Mastering JavaScript Arrays is well worth a read.Two-Bit Alchemist– Two-Bit Alchemist2014-03-16 08:00:45 +00:00Commented Mar 16, 2014 at 8:00
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3 Answers
You can find the index of the item being removed with Array.prototype.indexOf and you can eliminate the particular element with Array.prototype.splice, like this
var arr = ["a","b","c"];
arr.splice(arr.indexOf("c"), 1);
console.log(arr);
# [ 'a', 'b' ]
The second parameter passed to splice is to instruct how many elements to be removed from the index specified with the first parameter.
6 Comments
thefourtheye
@Two-BitAlchemist But that removes only the last element. What if
c is in the middle?
Two-Bit Alchemist
Then you use a different method. I mention
pop because it is not clear from the question which is more suited to the OP's use case. If the element to be removed always happens to be last, no need to compute indexOf.
Lewis
I've just tried your method. And it returned value "c" instead of array ["a","b"].
thefourtheye
@user3247703 I think it was not clear earlier. Please check the update now.
Lewis
It still turned out value "c". I already know "splice", which cut off element from array. But it normally returns removed value instead of array. And in this case, I need the inverse values of splice method.
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return arr.filter(function(e) { return (e !== 'c') ; });
Comments
Just find in arr.splice(arr.indexOf("c"));
