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JOSE HERRADA
Asked: 2020-07-25 15:22:18 +0800 CST 2020-07-25 15:22:18 +0800 CST

Problems with regular expressions in JavaScript

  • 772

I am trying to search for the numbers within a string, when I do so it only returns the last number of that string.

var exp = string.match('\:\d*[0-9]\,');

What I try to do is search for the numbers that go after the character : and before , but it doesn't work for me

var string = 'Caja_cebolla X100 :1.5, Caja_tomate :2, Caja_cebollin :0.25'; // Busco que me tome los números que estan delante de : y antes de ,
var exp = string.match('\:\d*[0-9]\,');
console.log(exp);

Basically I'm looking for the numbers after : and before ,. Example:

In Caja_cebolla X100 that I take the number 1.5

javascript

1 Answers

  1. Best Answer
    1. The following regular expression looks for it to start with a colon \: , then a digit \d with or without a decimal point +(.\d{1,2})? to finish find all matches with /g .
    2. We use the colon as an anchor so it doesn't collide with the X100, then we remove the colon by mapping the returned array and replacing it with "empty".
    3. The trailing comma cannot be used, as not all values ​​have one.

    I hope it works for you!

    var string = 'Caja_cebolla X100 :1.5, Caja_tomate :2, Caja_cebollin :0.25';
var exp = string.match(/\:\d+(\.\d{1,2})?/g).map(e => e.replace(':',''));
console.log(exp);

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