I have two arrays:
var firstArr = [1,2,3,4,5];
var secondArr = [2,3];
How can I get an array like this:
[1,4,5]
I would like to use a solution that could be used when elements of the array are objects with multiple properties.
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If you can use underscore: underscorejs.org/#uniqepascarello– epascarello2015-06-28 15:16:33 +00:00Commented Jun 28, 2015 at 15:16
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possible duplicate of Comparing two arrays in JavascriptMrUpsidown– MrUpsidown2015-06-28 15:16:49 +00:00Commented Jun 28, 2015 at 15:16
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@epascarello This question is not about removing duplicates...Siguza– Siguza2015-06-28 15:20:07 +00:00Commented Jun 28, 2015 at 15:20
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2 Answers
Use filter:
The
filter()method creates a new array with all elements that pass the test implemented by the provided function.
For example:
firstArr.filter(function(item){
return secondArr.indexOf(item) === -1;
});
1 Comment
Siguza
For OP's second request (array elements are objects), it should be noted that this will only work if the same object is present in both arrays, and not just a copy of that object.
You can use this Function to remove items.
function removeA(arr) {
var what, a = arguments, L = a.length, ax;
while (L > 1 && arr.length) {
what = a[--L];
while ((ax= arr.indexOf(what)) !== -1) {
arr.splice(ax, 1);
}
}
return arr;
}
var ary = ['three', 'seven', 'eleven'];
removeA(ary, 'seven');
