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map.js
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map.js
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const eqArrays = function(firstArray, secondArray) {
if (firstArray.length !== secondArray.length) {
return false;
}
for (let i = 0; i < firstArray.length; i++) {
if (firstArray[i] !== secondArray[i]) {
return false;
}
}
return true;
};
const assertArraysEqual = function(actual, expected) {
const areEqual = eqArrays(actual, expected);
if (areEqual) {
console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
} else {
console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
}
};
const drinks = ["mocha", "latte", "americano", "cappuccino", "cortado"];
const map = function(array, callback) {
const results = [];
for (let item of array) {
results.push(callback(item));
console.log('item BEFORE: ', item);
console.log('item AFTER: ', callback(item));
console.log('---');
}
return results;
};
//Define a callback function
const callback = function(array) {
return array.length;
};
const lengthOfDrinks = map(drinks, callback);
console.log(lengthOfDrinks);
assertArraysEqual(lengthOfDrinks, [5,5,9,10,7]); // Should return true
module.exports = map;