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map.js
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map.js
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const assertArraysEqual = function(array1, array2, assertArg) {
if (eqArrays(array1, array2) === assertArg) {
console.log(`😻😻😻 Assertion Passed: ${array1} and ${array2} === ${assertArg}`);
} else {
console.log(`😿😿😿 Assertion Failed: ${array1} and ${array2} !== ${assertArg}`);
}
};
const eqArrays = function(array1, array2) {
if (array1.length !== array2.length) {
return false;
}
for (let i = 0; i < array1.length; i++) {
if (array1[i] !== array2[i]) {
return false;
}
}
return true;
};
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);