@mxmitch/lotide/map.js

A mini clone of the [Lodash](https://lodash.com) library.

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;
};

//TESTING MAP
const results1 = map(words, word => word[0]);
console.log(results1);

const results2 = map(words, word => word.length);
console.log(results2);

const results3 = map(words, word => word + word);
console.log(results3);

//Function to test if arrays are equal
const eqArrays = function(array1, array2) {
  if (array1.length !== array2.length) {
    return false;
  } else {
    for (let i = 0; i < array1.length; i++) {
      if (typeof array1[i] !== typeof array2[i]) {
        return false;
      }
    }
    for (let i = 0; i < array1.length; i++) {
      if (array1[i] !== array2[i]) {
        return false;
      }
    }
    return true;
  }
};

//Function to assert if arrays are equal
const assertArraysEqual = function(actual, expected) {
  if (eqArrays(actual, expected)) {
    console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
  } else {
    console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
  }
};

// TEST CODE
assertArraysEqual(results1, ['g', 'c', 't', 'm', 't']);
assertArraysEqual(results2, [6, 7, 2, 5, 3]);
assertArraysEqual(results3, ['groundground',
  'controlcontrol',
  'toto',
  'majormajor',
  'tomtom'
]);