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countOnly.js
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countOnly.js
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// FUNCTION IMPLEMENTATION
const assertEqual = function(actual, expected) {
// values matching
if (actual === expected) {
console.log(`😊😊😊 Assertion Passed: ${actual} === ${expected}`);
} else {
// Values not matching
console.log(`😡😡😡 Assertion Failed: ${actual} !== ${expected}`);
}
};
//allItems: an array of strings that we need to look through
//itemsToCount: an object specifying what to count
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;
}
// Array to pass to allItems
const firstNames = [
"Karl",
"Salima",
"Agouhanna",
"Fang",
"Kavith",
"Jason",
"Salima",
"Fang",
"Joe"
];
// Tests, Object of itemsToCount
const result1 = countOnly(firstNames, { "Jason": true, "Karima": true, "Fang": true, "Agouhanna": false });
console.log(result1);
assertEqual(result1["Jason"], 1);
assertEqual(result1["Karima"], undefined);
assertEqual(result1["Fang"], 2);
assertEqual(result1["Agouhanna"], undefined);