freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-non-numbers.english.md

id	title	challengeType	forumTopicId
587d7db8367417b2b2512ba1	Match All Non-Numbers	1	301347

Description

The last challenge showed how to search for digits using the shortcut \d with a lowercase d. You can also search for non-digits using a similar shortcut that uses an uppercase D instead. The shortcut to look for non-digit characters is \D. This is equal to the character class [^0-9], which looks for a single character that is not a number between zero and nine.

Instructions

Use the shorthand character class for non-digits \D to count how many non-digits are in movie titles.

Tests

tests:
  - text: Your regex should use the shortcut character to match non-digit characters
    testString: assert(/\\D/.test(noNumRegex.source));
  - text: Your regex should use the global flag.
    testString: assert(noNumRegex.global);
  - text: Your regex should find no non-digits in <code>"9"</code>.
    testString: assert("9".match(noNumRegex) == null);
  - text: Your regex should find 6 non-digits in <code>"Catch 22"</code>.
    testString: assert("Catch 22".match(noNumRegex).length == 6);
  - text: Your regex should find 11 non-digits in <code>"101 Dalmatians"</code>.
    testString: assert("101 Dalmatians".match(noNumRegex).length == 11);
  - text: Your regex should find 15 non-digits in <code>"One, Two, Three"</code>.
    testString: assert("One, Two, Three".match(noNumRegex).length == 15);
  - text: Your regex should find 12 non-digits in <code>"21 Jump Street"</code>.
    testString: assert("21 Jump Street".match(noNumRegex).length == 12);
  - text: 'Your regex should find 17 non-digits in <code>"2001: A Space Odyssey"</code>.'
    testString: 'assert("2001: A Space Odyssey".match(noNumRegex).length == 17);'

Challenge Seed

let movieName = "2001: A Space Odyssey";
let noNumRegex = /change/; // Change this line
let result = movieName.match(noNumRegex).length;

Solution

let movieName = "2001: A Space Odyssey";
let noNumRegex = /\D/g; // Change this line
let result = movieName.match(noNumRegex).length;