how to split string in javascript using RegExp?

Question

There is a string:

var str = "a1c a12c a23c ac 1234 abc";

and a RegExp:

var re = /a(\d*)c/g;

I want to split str by number that between a and c, the result I want is:

['a','c a','c a','c a','c 1234 abc']

how to do it?

@marvel308 sorry! Why the result should be ['a','c a','c a','c ac 1234 abc']? I want result is ['a','c a','c a','c a','c 1234 abc']. I want to split ac too. — Guo
– Guo, Commented Feb 22, 2017 at 8:45

John Bupit · Accepted Answer · 2017-02-22 08:29:26Z

3

One way is to replace numbers with a special character ('-' in this case), and split with that character.

str.replace(/a(\d*)c/g, 'a-c').split('-');

var str = "a1c a12c a23c ac 1234 abc";
var re = /a(\d*)c/g;

console.log(str.replace(re, 'a-c').split('-'));

answered Feb 22, 2017 at 8:29

John Bupit

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Comments

Nina Scholz · Accepted Answer · 2017-02-22 08:50:40Z

0

You could use a positive look ahead.

var str = "a1c a12c a23c ac 1234 abc";

console.log(str.split(/\d*(?=\d*c.*a)/));

answered Feb 22, 2017 at 8:50

Nina Scholz

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Thanks! But if str = "b1c a12c a23c ac 1234 abc", the result is wrong.

@Guo, please add the wanted result as well.

I wanted result is ['b1c a','c a','c a','c 1234 abc'], in fact, reslut is ['b','c a','c a','c a','c 1234 abc']

@Guo question how b1c a got parse to "b", "c a"?