freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/6821ebd4237de8297eaee791.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6821ebd4237de8297eaee791	Challenge 15: camelCase	28	challenge-15

--description--

Given a string, return its camel case version using the following rules:

• Words in the string argument are separated by one or more characters from the following set: space ( ), dash (-), or underscore (_). Treat any sequence of these as a word break.
• The first word should be all lowercase.
• Each subsequent word should start with an uppercase letter, with the rest of it lowercase.
• All spaces and separators should be removed.

--hints--

toCamelCase("hello world") should return "helloWorld".

assert.equal(toCamelCase("hello world"), "helloWorld");

toCamelCase("HELLO WORLD") should return "helloWorld".

assert.equal(toCamelCase("HELLO WORLD"), "helloWorld");

toCamelCase("secret agent-X") should return "secretAgentX".

assert.equal(toCamelCase("secret agent-X"), "secretAgentX");

toCamelCase("FREE cODE cAMP") should return "freeCodeCamp".

assert.equal(toCamelCase("FREE cODE cAMP"), "freeCodeCamp");

toCamelCase("ye old-_-sea faring_buccaneer_-_with a - peg__leg----and a_parrot_ _named- _squawk") should return "yeOldSeaFaringBuccaneerWithAPegLegAndAParrotNamedSquawk".

assert.equal(toCamelCase("ye old-_-sea  faring_buccaneer_-_with a - peg__leg----and a_parrot_ _named- _squawk"), "yeOldSeaFaringBuccaneerWithAPegLegAndAParrotNamedSquawk");

--seed--

--seed-contents--

function toCamelCase(s) {

  return s;
}

--solutions--

function toCamelCase(s) {
  const words = s.replace(/[_\- ]+/g, ' ').split(' ');

  return words.map((word, i) => {
    if (i === 0) {
      return word.toLowerCase();
    } else {
      const tempWord = word.split('');
      return tempWord.shift().toUpperCase() + tempWord.join('').toLowerCase();
    }
  }).join('')
}