var arr = [ 4, "Pete", "test", 8, "John", "", "test" ];
How can i remove from this array values test and empty string? How is the best method for this?
-
6Duplicate - stackoverflow.com/questions/3954438/…Diogo Raminhos– Diogo Raminhos2012-08-07 11:34:12 +00:00Commented Aug 7, 2012 at 11:34
Add a comment
|
4 Answers
var arr = [ 4, "Pete", "test", 8, "John", "", "test" ];
var l = arr.length;
while( l-- ) {
if( arr[l] === "test" || arr[l] === "" ) {
arr.splice(l, 1);
}
}
//> arr
//[4, "Pete", 8, "John"]
3 Comments
jAndy
arr.splice( arr.indexOf('test'), 1 );
Esailija
@jAndy not really, there are multiple items to be removed. And using indexOf multiple times here would be cringeworthy because of the
n²-essjAndy
oh yea you're right. didn't realize there are multiple values. My solution was flawed anyhow because of
-1 false positives on no-matchAlternative: filter
var arr = [ 4, "Pete", "test", 8, "John", "", "test" ]
.filter(function(v){return String(v).length && v !== 'test';});
//=> arr = [4, "Pete", 8, "John"];
1 Comment
jAndy
Array.prototype.filter works non-destructive, you need to assign the value back to arr. Beside that, why not just calling return v !== 'test'; ?check it may help you if you want to remove single Item
Comments
if you know the index of your item in array you can easily use splice like
arr.splice(index,howmany)
howmany=The number of items to be removed
