/
map.js
38 lines (32 loc) · 986 Bytes
/
map.js
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const eqArrays = function(arr1, arr2) {
if (arr1.length !== arr2.length) {
return false;
} else {
for (let i = 0; i < arr1.length; i++) {
if (arr1[i] !== arr2[i]) {
return false;
}
}
}
return true;
};
let assertArraysEqual = function(actual, expected) {
const result = eqArrays(actual, expected);
if (result === true) {
console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
} else {
console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
}
};
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]);
assertArraysEqual(results1, ["g", "c", "t", "m", "t"]); // true
assertArraysEqual(results1, ["g", "c", "t", "m", "T"]); // false
assertArraysEqual(results1, ["c", "g", "t", "m", "t"]); // false