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how to use the match function in javascript for regex

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Helpless Hamster answered on April 7, 2020 Popularity 10/10 Helpfulness 3/10

answer how to use the match function in javascript for regex

related javascript regex example match

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how to use the match function in javascript for regex

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const str = 'For more information, see Chapter 3.4.5.1';
const re = /see (chapter \d+(\.\d)*)/i;
const found = str.match(re);

console.log(found);

// logs [ 'see Chapter 3.4.5.1',
//        'Chapter 3.4.5.1',
//        '.1',
//        index: 22,
//        input: 'For more information, see Chapter 3.4.5.1' ]

// 'see Chapter 3.4.5.1' is the whole match.
// 'Chapter 3.4.5.1' was captured by '(chapter \d+(\.\d)*)'.
// '.1' was the last value captured by '(\.\d)'.
// The 'index' property (22) is the zero-based index of the whole match.
// The 'input' property is the original string that was parsed.

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: function javascript match regex

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Contributed on Aug 07 2020

Helpless Hamster

0 Answers Avg Quality 2/10

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javascript regex example match

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//Declare Reg using slash
let reg = /abc/
//Declare using class, useful for buil a RegExp from a variable
reg = new RegExp('abc')

//Option you must know: i -> Not case sensitive, g -> match all the string
let str = 'Abc abc abc'
str.match(/abc/) //Array(1) ["abc"] match only the first and return
str.match(/abc/g) //Array(2) ["abc","abc"] match all
str.match(/abc/i) //Array(1) ["Abc"] not case sensitive
str.match(/abc/ig) //Array(3) ["Abc","abc","abc"]
//the equivalent with new RegExp is
str.match('abc', 'ig') //Array(3) ["Abc","abc","abc"]

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: developer.mozilla.org

Tags: javascript j

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Contributed on Apr 07 2020

POG

0 Answers Avg Quality 2/10

js regexp match

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// 1. Match indices for numbered group
const matchObj = /(a+)(b+)/d.exec('aaaabb');

console.log(matchObj);
/*
Output -
['aaaabb', 'aaaa', 'bb', index: 0, input: 'aaaabb', groups: undefined, indices: Array(3)]
*/
// then
matchObj.indices[1];
/*
Output - 
[0, 4]
*/
// -------------------------

// 2. Match indices for named groups
const matchObj = /(?<as>a+)(?<bs>b+)/d.exec('aaaabb');

console.log(matchObj);
/*
Output - 
['aaaabb', 'aaaa', 'bb', index: 0, input: 'aaaabb', groups: {as: 'aaaa', bs: 'bb'}, indices: Array(3)]
*/
// then
matchObj.indices.groups;
/*
Output -
{ as: [0,4], bs: [4,6] }
*/

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: dev.to

Tags: javascript j

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Contributed on Mar 25 2022

barisx

0 Answers Avg Quality 2/10

js regexp match

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// ES2022
const matchObj = /(a+)(b+)/d.exec('aaaabb');

console.log(matchObj);
/*
Output -
['aaaabb', 'aaaa', 'bb', index: 0, input: 'aaaabb', groups: undefined, indices: Array(3)]
*/

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: dev.to

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Mar 25 2022

barisx

0 Answers Avg Quality 2/10

how to use the match function in javascript for regex

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how to use the match function in javascript for regex

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