freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md

id, title, isRequired, challengeType

id	title	isRequired	challengeType
a103376db3ba46b2d50db289	Spinal Tap Case	true	5

Description

Convert a string to spinal case. Spinal case is all-lowercase-words-joined-by-dashes. Remember to use Read-Search-Ask if you get stuck. Try to pair program. Write your own code.

Instructions

Tests

tests:
  - text: <code>spinalCase("This Is Spinal Tap")</code> should return <code>"this-is-spinal-tap"</code>.
    testString: 'assert.deepEqual(spinalCase("This Is Spinal Tap"), "this-is-spinal-tap", ''<code>spinalCase("This Is Spinal Tap")</code> should return <code>"this-is-spinal-tap"</code>.'');'
  - text: <code>spinalCase("thisIsSpinal<wbr>Tap")</code> should return <code>"this-is-spinal-tap"</code>.
    testString: 'assert.strictEqual(spinalCase(''thisIsSpinalTap''), "this-is-spinal-tap", ''<code>spinalCase("thisIsSpinal<wbr>Tap")</code> should return <code>"this-is-spinal-tap"</code>.'');'
  - text: <code>spinalCase("The_Andy_<wbr>Griffith_Show")</code> should return <code>"the-andy-griffith-show"</code>.
    testString: 'assert.strictEqual(spinalCase("The_Andy_Griffith_Show"), "the-andy-griffith-show", ''<code>spinalCase("The_Andy_<wbr>Griffith_Show")</code> should return <code>"the-andy-griffith-show"</code>.'');'
  - text: <code>spinalCase("Teletubbies say Eh-oh")</code> should return <code>"teletubbies-say-eh-oh"</code>.
    testString: 'assert.strictEqual(spinalCase("Teletubbies say Eh-oh"), "teletubbies-say-eh-oh", ''<code>spinalCase("Teletubbies say Eh-oh")</code> should return <code>"teletubbies-say-eh-oh"</code>.'');'
  - text: <code>spinalCase("AllThe-small Things")</code> should return <code>"all-the-small-things"</code>.
    testString: 'assert.strictEqual(spinalCase("AllThe-small Things"), "all-the-small-things", ''<code>spinalCase("AllThe-small Things")</code> should return <code>"all-the-small-things"</code>.'');'

Challenge Seed

function spinalCase(str) {
  // "It's such a fine line between stupid, and clever."
  // --David St. Hubbins
  return str;
}

spinalCase('This Is Spinal Tap');

Solution

function spinalCase(str) {
  // "It's such a fine line between stupid, and clever."
  // --David St. Hubbins
  str = str.replace(/([a-z](?=[A-Z]))/g, '$1 ');
  return str.toLowerCase().replace(/\ |\_/g, '-');
}