JS 코테를 위한 유틸함수

[youngkyo0504]

템플릿 예시입니다.

title:
full_path: src/pages/.md

function onlyUnique(value, index, array) {
  return array.indexOf(value) === index;
}

// usage example:
var a = ['a', 1, 'a', 2, '1'];
var unique = a.filter(onlyUnique);

console.log(unique); // ['a', 1, 2, '1']

그 외 [you-dont-need You-Dont-Need-Lodash-Underscore: List of JavaScript methods which you can use natively + ESLint Plugin](https://github.com/you-dont-need/You-Dont-Need-Lodash-Underscore)