freeCodeCamp/curriculum/challenges/02-javascript-algorithms-and-data-structures/regular-expressions/Match Everything But Letters and Numbers.md

id, title, challengeType

id	title	challengeType
587d7db8367417b2b2512ba0	Match Everything But Letters and Numbers	1

Description

You've learned that you can use a shortcut to match alphanumerics [A-Za-z0-9_] using \w. A natural pattern you might want to search for is the opposite of alphanumerics. You can search for the opposite of the \w with \W. Note, the opposite pattern uses a capital letter. This shortcut is the same as [^A-Za-z0-9_].

let shortHand = /\W/;
let numbers = "42%";
let sentence = "Coding!";
numbers.match(shortHand); // Returns ["%"]
sentence.match(shortHand); // Returns ["!"]

Instructions

Use the shorthand character class \W to count the number of non-alphanumeric characters in various quotes and strings.

Tests

- text: Your regex should use the global flag.
  testString: 'assert(nonAlphabetRegex.global, "Your regex should use the global flag.");'
- text: Your regex should find 6 non-alphanumeric characters in <code>"The five boxing wizards jump quickly."</code>.
  testString: 'assert("The five boxing wizards jump quickly.".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"The five boxing wizards jump quickly."</code>.");'
- text: Your regex should use the shorthand character.
  testString: 'assert(/\\W/.test(nonAlphabetRegex.source), "Your regex should use the shorthand character to match characters which are non-alphanumeric.");'
- text: Your regex should find 8 non-alphanumeric characters in <code>"Pack my box with five dozen liquor jugs."</code>
  testString: 'assert("Pack my box with five dozen liquor jugs.".match(nonAlphabetRegex).length == 8, "Your regex should find 8 non-alphanumeric characters in <code>"Pack my box with five dozen liquor jugs."</code>");'
- text: Your regex should find 6 non-alphanumeric characters in <code>"How vexingly quick daft zebras jump!"</code>
  testString: 'assert("How vexingly quick daft zebras jump!".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"How vexingly quick daft zebras jump!"</code>");'
- text: Your regex should find 12 non-alphanumeric characters in <code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>
  testString: 'assert("123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ.".match(nonAlphabetRegex).length == 12, "Your regex should find 12 non-alphanumeric characters in <code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>");'

Challenge Seed

let quoteSample = "The five boxing wizards jump quickly.";
let nonAlphabetRegex = /change/; // Change this line
let result = quoteSample.match(nonAlphabetRegex).length;

Solution

// solution required