-
Notifications
You must be signed in to change notification settings - Fork 0
/
110_getAllButLastElement.js
29 lines (25 loc) · 899 Bytes
/
110_getAllButLastElement.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
/*
Write a function called "getAllButLastElementOfProperty".
Given an object and a key, "getAllButLastElementOfProperty" returns an array containing all but the last element of the array located at the given key.
Notes:
* If the array is empty, it should return an empty array.
* If the property at the given key is not an array, it return an empty array.
* If there is no property at the key, it should return an empty array.
var obj = {
key: [1, 2, 3]
};
var output = getAllButLastElementOfProperty(obj, 'key');
console.log(output); // --> [1,2]
*/
function getAllButLastElementOfProperty(obj, key) {
var arr = obj[key];
var allElementsButLast = [];
if (!Object.keys(obj).includes(key) || arr.length === 0 || !Array.isArray(arr)) {
return []
} else {
for (var i = 0; i < arr.length - 1; i++) {
allElementsButLast.push(arr[i]);
}
}
return allElementsButLast;
}