/
map.js
39 lines (31 loc) · 1.03 KB
/
map.js
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// let 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;
// };
// const assertArraysEqual = function(array1, array2) {
// if (eqArrays(array1, array2) === true) {
// console.log(`✅✅✅ The arrays [${array1}] and [${array2}] are equal.`);
// } else {
// console.log(`🛑🛑🛑 the arrays [${array1}] and [${array2}] are not equal.`);
// }
// };
// 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;
};
module.exports = map;
// const results1 = map(words, word => word[0]);
// console.log(results1, ['g', 'c', 't', 'm', 't']);
// assertArraysEqual(results1, ['E', 'A', 'D', 'G', 'B', 'E']);
// assertArraysEqual(results1, ['E', 'A', 'D', 'G', 'B', 'e']);
// REVISE TO ASSERT EQUAL