javascript - Array to Comma separated string and for last tag use the 'and' instead of comma in jquery

Question

I have checked many questions and answers regarding join array with comma separated string, But my problem is that, I am making the string readable for human i.e I have tags array that's if their is two tags, then it would be tag1 and tag2 and if their is 100 tags then it would be tag1, tag2, ,,,tag99 and tag100 for last one use the and and before using the comma as a separator.

Any way to handle in JQuery?

Answer 1

You can use .slice():

> var a = [1, 2, 3, 4, 5];
> [a.slice(0, -1).join(', '), a.slice(-1)[0]].join(a.length < 2 ? '' : ' and ');
'1, 2, 3, 4 and 5'

• a.slice(0, -1).join(', '): takes all but the last element and joins them together with a comma.
• a.slice(-1)[0]: it's the last element.
• .join(a.length < 2 ? '' : ' and '): joins that string and the last element with and if there are at least two elements.