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map.js
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map.js
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const assertArraysEqual = function(arr1, arr2) {
if (eqArrays(arr1, arr2)){
console.log(`✅✅✅ Assertion Passed: ${arr1} === ${arr2}`);
} else {
console.log(`❌❌❌ Assertion Failed: ${arr1} !== ${arr2}`);
}
};
const eqArrays = function(arr1, arr2) {
if (arr1.length !== arr2.length) {
return false;
}
for (let i = 0; i < arr1.length; i++) {
if (arr1[i] !== arr2[i]) {
return false;
}
}
return true;
}
// New 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);
//Tests
assertArraysEqual(words, ["ground", "control", "to", "major", "tom"]);
assertArraysEqual(results1, ["g", "c", "t", "m", "t"]);