CODEWITHSUNDEEP
javascriptstring
Richard Rublev
Richard Rublev

Reputation: 8164

How to remove everything from string after the last character?

I am practicing and I wrote length of last word in JS.

var lengthOfLastWord = function (s) {
    var words = s.split(" ");
    var len = words.length;
    for (let i = 0; i < len; i++) {
        if (len == 1){
            var last_element = words[0];
        }
        else {
            var last_element = words[len - 1];
        }
    return last_element.length;    
    }
}

But it doesn't work well if

s = 'a '

or

s = 'Hello.'

How to write substring to remove everything except characters?

Upvotes: 1

Views: 67

Answers (2)

Adriatic
Adriatic

Reputation: 1287

I would suggest you to try the following code:

s = 'Hello. '
s.trim();

The trim() function removes all whitespaces from your String.

Upvotes: 1

AbbasEbadian
AbbasEbadian

Reputation: 693

You can use regex to replace charachters those are not in a-z or A-Z or 0-9. or simply just use \W in regex expression :

   var last_element = words[len - 1].replace(/\W/g, "");

Upvotes: 1

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