LeCafeCreme

var myArray = {id1: 100, id2: 200, "tag with spaces": 300}; myArray.id3 = 400; myArray["id4"] = 500; for (var key in myArray) { console.log("key " + key + " has value " + myArray[key]); } // Map을 사용한 방법 var map = new Map(); map.set('name', 'John'); map.set('id', 11); // Get the full content of the Map console.log(map); // Map { 'name' => 'John', 'id' => 11 } // key로 value가져오기 console.log(map.get..

stackoverflow.com/questions/35948669/how-to-check-if-a-value-exists-in-an-object-using-javascript How to check if a value exists in an object using JavaScript I have an object in JavaScript: var obj = { "a": "test1", "b": "test2" } How do I check that test1 exists in the object as a value? stackoverflow.com

stackoverflow.com/questions/1098040/checking-if-a-key-exists-in-a-javascript-object Checking if a key exists in a JavaScript object? How do I check if a particular key exists in a JavaScript object or array? If a key doesn't exist, and I try to access it, will it return false? Or throw an error? stackoverflow.com www.javascripttutorial.net/object/javascript-check-if-property-exists/ 3 Ways to Ch..

http://java.sun.com/jsp/jstl/functions" prefix="fn" %> ${fn:length(someList)}