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map.js
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map.js
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const eqArrays = function(arr1, arr2) {
let decider = true;
for (let i = 0; i < arr1.length; i++) {
if(arr1.length === arr2.length) {
if (arr1[i] === arr2[i]) {
decider = true;
} else {
decider = false;
}
} else {
decider = false;
}
}
return decider;
};
const assertArraysEqual = function(actual, expected) {
if (eqArrays(actual, expected)) {
console.log(String.fromCodePoint(0x2705) + ` Assertion Passed: Arrays are equal`);
} else {
console.log(String.fromCodePoint(0x274C) + ` Assertion Failed: Arrays are not equal`);
}
};
//Implement map function
const words = ["ground", "control", "to", "major", "tom"];
const map = function(array, callback) {
const results = [];
for (let item of array) {
results.push(callback(item))
}
return results;
};
// const results1 = map(words, word => word[0]);
// console.log(results1);
// assertArraysEqual(results1, [1, 2, 3]);
// assertArraysEqual(results1, ['g', 'c', 't', 'm', 't']);
module.exports = map;