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countOnly.js
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countOnly.js
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const assertEqual = function (actual, expected) {
if (actual === expected) {
console.log(`👌 Assertion Passed: ${actual} === ${expected}`);
} else {
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 result = [];
for (i = 0; i < allItems.length; i++) {
item = allItems[i];
if (itemsToCount[item] === true) {
if (result[item]) {
result[item] = result[item] + 1;
} else {
result[item] = 1;
}
}
}
return result;
};
// loop through elements in array
// list elements in object
// eliminate false elements
// compare elements in array and object and find which elements are present in both (assertEqual?)
// count how many times each equal element appears
const namesToFind = { Jason: true, Karima: true, Fang: true, Agouhanna: false };
const firstNames = [
"Karl",
"Salima",
"Agouhanna",
"Fang",
"Kavith",
"Jason",
"Salima",
"Fang",
"Joe",
];
const result1 = countOnly(firstNames, namesToFind);
console.log(result1);
assertEqual(result1["Jason"], 1);
assertEqual(result1["Karima"], undefined);
assertEqual(result1["Fang"], 2);
assertEqual(result1["Agouhanna"], undefined);