Filter and delete filtered elements in an array

Question

I want to remove specific elements in the original array (which is var a). I filter() that array and splice() returned new array. but

Answer 1

You can either make changes to the original array:

var a = [{name:'tc_001'}, {name:'tc_002'}, {name:'tc_003'}]
a = a.filter(function (e) {
    return e.name === 'tc_001';
});
a.splice(0,1);

Or in your own code just apply to a everything you've done to b

a = b

[edit]

Perhaps if I expand on what each action does, it will be more clear.

var a = [{name:'tc_001'}, {name:'tc_002'}, {name:'tc_003'}]
// You now have array a with 3 elements.

b = a.filter(function (e) {
    return e.name === 'tc_001';
});
// a is still 3 elements, b has one element (tc_001)

b.splice(0,1);
// You remove the first element from b, so b is now empty.

If you want to remove the elements tc_002 and tc_003 from a but keep them in b, this is what you can do:

var a = [{name:'tc_001'}, {name:'tc_002'}, {name:'tc_003'}]
b = a.filter(function (e) {
    return e.name != 'tc_001';
});
a = a.filter(function(item) { return b.indexOf(item) == -1; });
console.log(a); // tc_001
console.log(b); // tc_002, tc_003