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higher order #9

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46 changes: 36 additions & 10 deletions 06week/higherOrder.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,24 +2,50 @@

const assert = require('assert');

function forEach(arr, callback) {
// Your code here
function forEach(arr, hoge) {
for (let i = 0; i < arr.length; i++) {
hoge(arr[i]*arr.length)
};
}

function map(arr, callback) {
// Your code here
function map(arr, hoge) {
const newArr = [];
for (let i = 0; i < arr.length; i++) {
newArr.push(hoge(arr[i]));
};
return newArr;
}

function filter(arr, callback) {
// Your code here
function filter(arr, hoge) {
const newArr = [];
for (let i = 0; i < arr.length; i++) {
if (hoge(arr[i]) == true) {
newArr.push(arr[i]);
};
};
return newArr;
}

function some(arr, callback) {
// Your code here
function some(arr, hoge) {
for (let i = 0; i < arr.length; i++) {
if (hoge(arr[i]) == true) {
return true;
}
}
return false;
}

function every(arr, callback) {
// Your code here
function every(arr, hoge) {
let doot = false;
for (let i = 0; i < arr.length; i++) {
if (hoge(arr[i]) == true) {
doot = true;
} else {
doot = false;
break;
}
}
return doot;
}

if (typeof describe === 'function') {
Expand Down