| // runs asynchronous operations in parallel, no more than a specified number at a time | |
| // it takes an array of functions, which return promises when invoked without arguments | |
| // modelled after Promise.all() | |
| const wrap = value => { | |
| if (typeof value == 'function') return value(); | |
| if (value && typeof value.then == 'function') return value; // thenable | |
| return Promise.resolve(value); | |
| }; |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>DnD test bed - grouping</title> | |
| <link rel="stylesheet" href="./dnd.css" /> | |
| </head> | |
| <body> | |
| <h1>DnD test bed - grouping</h1> | |
| <div class="container"> | |
| <div class="item dnd-item dnd-handle">One</div> |
| // https://gist.github.com/uhop/fbb7fc3606cbb2fa54e0ce4f9a200037 | |
| // License: BSD-3 | |
| // (c) 2023 Eugene Lazutkin | |
| import http from 'http'; | |
| import fs from 'fs'; | |
| import path from 'path'; | |
| const fsp = fs.promises; |
| 'use strict'; | |
| class ListHead { | |
| constructor(head = null, next = 'next', prev = 'prev') { | |
| if (head instanceof ListHead) { | |
| ({nextName: this.nextName, prevName: this.prevName, head: this.head} = head); | |
| return; | |
| } | |
| this.nextName = next; | |
| this.prevName = prev; |
| let flag; | |
| const detectWebp = () => { | |
| if (typeof flag == 'boolean') return flag; | |
| const canvas = document.createElement('canvas'); | |
| flag = !!(canvas.getContext && canvas.getContext('2d') && /^data:image\/webp;/.test(canvas.toDataURL('image/webp'))); | |
| return flag; | |
| }; | |
| export default detectWebp; |
We need to setup an S3 bucket so we can use AWS JS SDK to upload files from a web application only for logged in users.
We already have a Cognito user pool, e.g., self-managed, and/or tied to a corporate SSO or social networks. Users may have different permissions depending on custom groups they are on. There is an app client, which is used to authenticate users in our web app.
| 'use strict'; | |
| const roll = pattern => { | |
| const samples = []; | |
| let counter = 0; | |
| for(;;){ | |
| if (samples.length >= pattern.length) { | |
| samples.shift(); | |
| } | |
| const sample = Math.floor(Math.random() * 6) + 1; |
| 'use strict'; | |
| const AWS = require('aws-sdk'); | |
| let profile = process.env.LAMBDA_TASK_ROOT && process.env.AWS_EXECUTION_ENV ? '' : 'default'; | |
| const profileIndex = process.argv.indexOf('--profile'); | |
| if (profileIndex > 0 && profileIndex + 1 < process.argv.length) { | |
| profile = process.argv[profileIndex + 1]; | |
| } |
| 'use strict'; | |
| const iterate = async function*(client) { | |
| const params = {MaxItems: '100'}; | |
| for (;;) { | |
| const data = await client.listDistributions(params).promise(), | |
| list = data.DistributionList, | |
| items = list.Items; | |
| if (items) { | |
| yield items; |
| 'use strict'; | |
| const List = require('./List'); | |
| class Cache { | |
| constructor(capacity = 10) { | |
| this.capacity = capacity; | |
| this.size = 0; | |
| this.list = new List(); | |
| this.dict = {}; |