I am Trying to get my head around some regex using JS .replace to replace an integer with a string.
For example, the string could be:
var string = 'item_descriptions_0_additional_details';
I want to replace the 0 with another value. I was originally using this:
string.replace( /\[\d\]/g, '[newvalue]');
But it is not working. I am very new in Regex.
Thanks in advance. Greatly appreciated.
What you have
\[\d\]
\[ - Means match [\d - Match any digit\] - Match ]since in your string you don't have any sequence which matches the regex pattern so it is not doing any replace
You need to use \d
var string = 'item_descriptions_0_additional_details';
let op = string.replace( /\d/g, '[new value]');
console.log(op)First, because string.replace returns a new string, it doesn't mutate the old string, so you need to assign the result of string.replace to a variable. Second, you have an invalid regex:
var string = 'item_descriptions_0_additional_details';
string = string.replace( /\d+/g, '[newvalue]');
console.log(string);Try \d+ for capture first occurrence of any sequence of digits (with length at least one char)
var string = 'item_descriptions_0_additional_details';
var r = string.replace(/\d+/,'[new value]');
console.log(r);