camelCase.js

in about Dev on Algorithm

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Problem

  • Write simple camelCase method for strings.
    • camelCase 메소드를 작성한다.
  • All words must have their first letter capitalized without spaces.
    • 모든 단어는 공백 없이 첫 글자가 대문자로 시작해야 한다.



Solution 01

function camelCase(str) {
  let arr = str.split(' ');
  let result = '';
  
  for (let i = 0; i < arr.length; i++) {
    result += arr[i] ? arr[i][0].toUpperCase() + arr[i].slice(1) : '';
  }
  return result;
}

camelCase('hello case');       // HelloCase
camelCase('camel case word');  // CamelCaseWord


Solution 02

function camelCase(str) {
  return str.split(' ').map(i => {
    return i.charAt(0).toUpperCase() + i.slice(1);
  }).join('');
}

camelCase('hello case');       // HelloCase
camelCase('camel case word');  // CamelCaseWord


Solution 03

function camelCase(str) {
  return str.split(' ').map(i => i.slice(0, 1).toUpperCase() + i.slice(1)).join('');
}

camelCase('hello case');       // HelloCase
camelCase('camel case word');  // CamelCaseWord