const regex = /([A-Z0-9]{4})/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('([A-Z0-9]{4})', 'gm')
const str = ` ; Message Number
; | Time Offset (ms)
; | | Type
; | | | ID (hex)
; | | | | Data Length
; | | | | | Data Bytes (hex) ...
; | | | | | |
;---+-- ----+---- --+-- ----+--- + -+ -- -- -- -- -- -- --
1) 2.0 Rx 0400 8 01 5A 01 57 01 D2 A6 02
2) 8.6 Rx 0500 8 02 C1 02 C9 02 BE 02 C2
3) 36.2 Rx 0401 8 01 58 01 59 01 01 01 01
4) 41.7 Rx 01C4 8 27 9C 64 8C 00 03 E8 08
5) 43.1 Rx 0501 8 02 C0 02 C1 02 C6 02 C0
6) 62.7 Rx 01C2 8 27 9C 60 90 00 0F 04 08 `;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions