正则表达式在JavaScript中拉出方括号

Question

Given...

var parts = 'value[1]'.split(/\[\]/);

What is the regex to have...

parts[0] === 'value';
parts[1] === '1';

The regex I have above doesn't work.

Answer 1

Your regex is matching only when '[' is followed by ']'. You want to use an "or":

var parts = 'value[1]'.split(/\[|\]/);

Tip: I use https://regex101.com/ which is very good to explain what the regex is matching in detail. Or, for .NET: http://regexstorm.net/tester

Answer 2

I would suggest using match for this:

match = 'value[1]'.match(/(\w+)\[(\d+)\]/)
match[1] // "value"
match[2] // "1"

The match here will match any word characters ( \\w+ ), followed by a [ , then any number of digits ( \\d+ ), followed by a ] .