-
Notifications
You must be signed in to change notification settings - Fork 0
/
countOnly.js
42 lines (37 loc) · 960 Bytes
/
countOnly.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
30
31
32
33
34
35
36
37
38
39
40
41
42
const assertEqual = require('./assertEqual')
// allItems = array, itemsToCount = object
// return an object containg counts of each item in the array (when object value is true)
const countOnly = function(allItems, itemsToCount) {
const results = {};
for (const item of allItems) {
if (itemsToCount[item]) {
if (results[item]) {
results[item] += 1;
} else {
results[item] = 1;
}
}
}
return results;
}
// TEST CODE
const firstNames = [
"Karl",
"Salima",
"Agouhanna",
"Fang",
"Kavith",
"Jason",
"Salima",
"Fang",
"Joe"
];
// result1 becomes the output of the countOnly fn, which is an object
const result1 = countOnly(firstNames, { "Jason": true, "Karima": true, "Fang": true, "Agouhanna": false });
assertEqual(result1["Jason"], 1);
assertEqual(result1["Karima"], undefined);
assertEqual(result1["Fang"], 2);
assertEqual(result1["Agouhanna"], undefined);
module.exports = {
countOnly
}