Kieran Barker kieranbarker
kieranbarker
/ array_at.js
Created
May 16, 2021 13:22
Return the item at the given index in the array, allowing for positive and negative integers. Negative integers count back from the last item in the array.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Return the item at the given index in the array, allowing for positive and | |
| * negative integers. Negative integers count back from the last item | |
| * in the array. | |
| * | |
| * {@link https://gist.github.com/kieranbarker/1bb4ae463f3cd8138b4805983de49f4d} | |
| * | |
| * @param {Array} array The array | |
| * @param {Number} index The index | |
| * @returns {*} The item at the given index |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # Alias for simple Python server | |
| serve() { | |
| python3 -m http.server $1 | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| [ | |
| "alabama", | |
| "alaska", | |
| "arizona", | |
| "arkansas", | |
| "california", | |
| "colorado", | |
| "connecticut", | |
| "delaware", | |
| "florida", |
kieranbarker
/ file_exists.js
Last active
April 14, 2022 19:11
Asynchronously check if a file exists in Node.js.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // | |
| // Callback API | |
| // | |
| import { access, constants } from 'fs'; | |
| const file = 'package.json'; | |
| access(file, constants.F_OK, error => { | |
| if (error) { |
kieranbarker
/ package.json
Last active
November 1, 2021 08:55
Asynchronously read and write files in Node.js.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| { | |
| "name": "read_write", | |
| "version": "1.0.0", | |
| "description": "Asynchronously read and write files.", | |
| "private": true, | |
| "main": "read_write.js", | |
| "type": "module", | |
| "scripts": { | |
| "start": "node read_write.js", | |
| "test": "echo \"Error: no test specified\" && exit 1" |
kieranbarker
/ append_file.js
Last active
November 8, 2021 09:09
Asynchronously append data to a file in Node.js.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import * as fs from 'fs'; | |
| import * as fsPromises from 'fs/promises'; | |
| const file = 'hello_world.txt'; | |
| const data = 'Hello, World!'; | |
| // | |
| // Callback API | |
| // |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Get today's date. | |
| * https://gist.github.com/kieranbarker/2c300d73059697a4417e12bd40cdef75 | |
| * @returns {Date} A Date object representing today's date at midnight in UTC. | |
| */ | |
| function getTodaysDate() { | |
| const dateString = new Date().toISOString().slice(0, 10); | |
| return new Date(dateString); | |
| } |
kieranbarker
/ inspect.js
Last active
March 14, 2022 09:07
A demo of the util.inspect() method in Node.js.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const { inspect } = require('util'); | |
| const restaurants = [ | |
| { | |
| name: 'Nando\'s', | |
| menus: { | |
| starters: [ | |
| { name: 'Halloumi Sticks & Dip', price: 425 }, | |
| { name: 'Houmous with PERi-PERi Drizzle', price: 425 }, | |
| { name: 'Sweet Potato Wedges with Garlic PERinaise', price: 425 } |
kieranbarker
/ index.html
Created
March 20, 2022 19:19
A simple demo of the top-level await keyword in vanilla JS.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Users</title> | |
| </head> | |
| <body> | |
| <h1>Users</h1> | |
| <p>Check the JavaScript console.</p> |
kieranbarker
/ xss.html
Created
March 23, 2022 17:33
A simple demo of a cross-site scripting (XSS) attack.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>XSS</title> | |
| </head> | |
| <body></body> | |
| <script> |