matchAll Array for Group 1 Regex Matches

Question

I'm trying to figure out a way to get all my Group 1 matches into an array without using a loop with matchAll().

Here's what I have thus far, but it only yields the first match:

let str = "123ABC, 123ABC"
let results = str.matchAll(/123(ABC)/gi);
let [group1] = results;
alert(group1[1]);

How can I get the results of the matchAll into one single array? Aka:

// ABC, ABC

[It has been answered already](https://stackoverflow.com/a/55059473/3832970) — Wiktor Stribiżew, Dec 01 '19 at 23:37
I don't agree with you @ WiktorStribiżew, but I won't reopen if you close. — Ori Drori, Dec 01 '19 at 23:44
@WiktorStribiżew the op specifically wants to get only all group 1 matches without using a loop. Your link reference doesn't specifically show how to achieve that — marshy101, Dec 02 '19 at 00:21
Voting to close as duplicate, since the accepted answer here is literally the same as the example from the accepted answer there: `console.log(Array.from(matches, m => m[1])); // All match (Group 1) values` — Félix Adriyel Gagnon-Grenier, Dec 02 '19 at 20:10

score 2 · Answer 1 · answered Dec 02 '19 at 00:22

2

const str = "123ABC, 123ABC"

const results = Array.from(
  str.matchAll(/123(ABC)/gi), 
  ([_, g1]) => g1
)

console.log(results)

answered Dec 02 '19 at 00:22

kornieff

2,389
19
29

score 1 · Answer 2 · answered Dec 02 '19 at 00:20

If you only need the abc part of the string then you don't need to use matchAll method. You can easily get the results you want simply using the positive lookbehind regex expresion with the match method.

let str = "123ABC, 123ABC"
let results = str.match(/(?<=123)ABC/gi);
console.log(results)
// ["ABC","ABC"]

Here is some more information on these types of regex expressions Lookahead and lookbehind

score 0 · Accepted Answer · answered Dec 01 '19 at 23:40

0

You can use Array.from to convert results to array and perform map in one go:

const matches = Array.from(results, match => match[1])

answered Dec 01 '19 at 23:40

Alex

1,724
13
25

matchAll Array for Group 1 Regex Matches

3 Answers3