CODEWITHSUNDEEP
javascriptregex
Soth
Soth

Reputation: 3045

Regex to match a phone number ignoring non digits

Im trying to match a phone number in regex when there is a non standard format in the data. How would you write a regex to match 0408111 in all 4 of these examples?

(04) 0811 111
0408-111111
0408111111
0a4b0c8d1e1f1g

The best I came up with is:

/0[^\d]*4[^\d]*0[^\d]*8[^\d]*1[^\d]*1[^\d]*1/g

But is there a better way?

var haystack = `
(04) 0811 111
0408-111111
0408111111
0a4b0c8d1e1f1g
`;
var needle = /0[^\d]*4[^\d]*0[^\d]*8[^\d]*1[^\d]*1[^\d]*1/g;
var result = haystack.match(needle);
console.log(result);

Upvotes: 1

Views: 315

Answers (1)

JPI93
JPI93

Reputation: 1557

Given the example string from your question.

let haystack = `
(04) 0811 111
0408-111111
0408111111
0a4b0c8d1e1f1g
`

One solution to return the string '0408111' each time digits appear in this order within each line of haystack whilst discounting any non-numerical interspersed within each line would be to:

  1. Remove any non-numerical characters from haystack
  2. Return all matches of the pattern /0408111/g
let result = haystack.replace(/[^\d\n]/g, '').match(/0408111/g)

Given haystack as above, result will be [ '0408111', '0408111', '0408111', '0408111' ].

Since you say that you are using this to search for phone numbers within each line of the input string and the example you gave in your question is seeking a match on 7 consecutive digits in each line regardless of any non-numeric characters. The above code could be adjusted as to match the first 7 digits in each line once non-numeric characters have been removed - by matching on /\d{7}/g instead /0408111/g pattern.

e.g

let haystack = `
(04) 0811 111
0454-14717181
0768551351111
0tY4lopj9pjo5567
0a4b0c8d1e1f1g
123456
`

let result = haystack.replace(/[^\d\n]/g, '').match(/\d{7}/g)

Here result will be [ '0408111', '0454147', '0768551', '0495567', '0408111' ]

Upvotes: 2

Related Questions