/* Create */const set = new Set();/* Add */set.add(1)set.add(2)set.add(3)set.add(1)console.log(set) // Output: Set(3) { 1, 2, 3 }/* Check */console.log(set.has(1)) // trueconsole.log(set.has(5)) // false/* Remove */set.delete(1)/* Size */console.log(set.size) // 2/* Iterate */for (let item of set) { console.log(item)}set.forEach(value => { console.log(value)})/* Convert Set to Array */const ar..

문자 > 아스키코드let str = "Hello world!";console.log(str.charCodeAt(0)); // 72 (H)console.log(str.charCodeAt(1)); // 101 (e) 아스키코드 > 문자const code_e = 101;const code_H = 72;console.log(String.fromCharCode(code_e)); // econsole.log(String.fromCharCode(code_H)); // H