Getting an empty string at the end of an array returned by method split

Question

var s = "Hello, how are you?";
var r = /([,\s?]+)/;
console.log(s.split(r));

Why do i get an empty string at the end of the array?

Your expression matches a single ?. If you use /([,\s]+)/ instead, you'll get "you?" as the last element. If you don't want that either, manually remove the last element. — user5734311
– user5734311, Commented Jul 3, 2018 at 7:40
Is there a way to prevent this from happening or do i always have to check the string's last character and only then split it? — Arthur Hmayakyan
– Arthur Hmayakyan, Commented Jul 3, 2018 at 9:55

Joven28 · Accepted Answer · 2018-07-03 07:41:16Z

2

Remove the question mark after the \s.

var s = "Hello, how are you?";
var r = /([,\s]+)/;
console.log(s.split(r));

answered Jul 3, 2018 at 7:41

Joven28

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Comments

KooiInc · Accepted Answer · 2018-07-03 08:15:16Z

1

Because you ar splitting on the question mark too. Without it:

var s = "Hello, how are you?";
var r = /([,\s]+)/;
console.log(s.split(r));
// including question mark in the split
// and empty values removed from the result
console.log(s.split(/([,\s]+|[?])/).filter(v => v.length));

edited Jul 3, 2018 at 8:15

answered Jul 3, 2018 at 7:41

KooiInc

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