How to solve such a problem with a regular expression?

Question

JavaScript

We need a regular expression for which the following occurrences will be TRUE: "money_1", "money_2", "money_3", "money_4_a", "money_40_a", "money_{number}_{word}". Where "number" can be any number and "word" can be any character set.

Answer 1

const reg = /^money_\d+(_\w+)?$/;

// подходят
console.log([
  'money_1',
  'money_22',
  'money_3_a',
  'money_0_xxx666'
].map(n => reg.test(n)));

// не подходят
console.log([
  'honey_1',
  'money_q2',
  'money_3~a',
  '!money_0_xxx666'
].map(n => reg.test(n)));