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- // Setup
- var collection = {
- "2548": {
- "album": "Slippery When Wet",
- "artist": "Bon Jovi",
- "tracks": [
- "Let It Rock",
- "You Give Love a Bad Name"
- ]
- },
- "2468": {
- "album": "1999",
- "artist": "Prince",
- "tracks": [
- "1999",
- "Little Red Corvette"
- ]
- },
- "1245": {
- "artist": "Robert Palmer",
- "tracks": [ ]
- },
- "5439": {
- "album": "ABBA Gold"
- }
- };
- // Keep a copy of the collection for tests
- var collectionCopy = JSON.parse(JSON.stringify(collection));
- // Only change code below this line
- function updateRecords(id, prop, value) {
- if (value.length == 0) {
- delete collection[id][prop];
- }
- else {
- collection[id][prop] = value;
- }
- return collection;
- }
- // Alter values below to test your code
- updateRecords(5439, "artist", "ABBA");
- // practice code
- /*console.log("Hello World");
- var number = 5; // in-line comment
- console.log(++number);
- number = "five";
- console.log(number);
- var a;
- console.log(a);
- a = a + "lol";
- console.log(a);
- var product = 2.01 * 2.5;
- console.log(product);
- var str = "Hello";
- console.log(str);
- str[0]='h';
- console.log(str);
- var myArray = [5, 6, 7];
- console.log(myArray.pop());
- myArray.push(8);
- console.log(myArray);
- console.log(myArray.shift());
- myArray.unshift(4);
- console.log(JSON.stringify(myArray));
- var a = 3;
- var b = "3";
- if (a=b)
- console.log("test 1 true");
- else
- console.log("test 1 false");
- if (a==b)
- console.log("test 2 true");
- else
- console.log("test 2 false");
- if (a===b)
- console.log("test 3 true");
- else
- console.log("test 3 false");
- var student = {
- "name" : "John",
- "marks" : 67
- };
- student["age"] = 12;
- delete student["age"];
- console.log(student);
- */
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