| // Converts an ArrayBuffer directly to base64, without any intermediate 'convert to string then | |
| // use window.btoa' step. According to my tests, this appears to be a faster approach: | |
| // http://jsperf.com/encoding-xhr-image-data/5 | |
| /* | |
| MIT LICENSE | |
| Copyright 2011 Jon Leighton | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
| /** | |
| * Fancy ID generator that creates 20-character string identifiers with the following properties: | |
| * | |
| * 1. They're based on timestamp so that they sort *after* any existing ids. | |
| * 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs. | |
| * 3. They sort *lexicographically* (so the timestamp is converted to characters that will sort properly). | |
| * 4. They're monotonically increasing. Even if you generate more than one in the same timestamp, the | |
| * latter ones will sort after the former ones. We do this by using the previous random bits | |
| * but "incrementing" them by 1 (only in the case of a timestamp collision). | |
| */ |
| function rndBase32(len) { | |
| return ( ~~(Math.random() * Math.pow(32, len)) ).toString(32); | |
| } |
The follwing is my working document as I create a pipeline for faster YouTube > LibSyn / iTunes distribution. This is not complete, but really cuts down on some time.
I'm a commandline guy, I like UNIX tooling philosophy. Hence, my prereqs.
| const stream = require('stream') | |
| const Gun = require('gun') | |
| const randomString = length => { | |
| const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' | |
| let text = '' | |
| for (var i = 0; i < length; i++) { | |
| text += possible[Math.floor(Math.random() * possible.length)] | |
| } | |
| return text |
| /* You'll need this on your client | |
| Gun.on('opt', function (ctx) { | |
| if (ctx.once) { | |
| return | |
| } | |
| ctx.on('out', function (msg) { | |
| var to = this.to | |
| // Adds headers for put | |
| msg.headers = { | |
| token: 'thisIsTheTokenForReals' |
| Gun.on('opt', function(ctx){ | |
| const ACK_ = '@'; | |
| const SEQ_ = '#'; | |
| var gun = ctx.gun; | |
| this.to.next(ctx); | |
| ctx.on('put', function(at) { | |
| this.to.next(at); | |
| ctx.on('in', {[ACK_]: at[SEQ_], gun:gun, ok: 1}); |
| import * as React from 'react'; | |
| import { | |
| View, | |
| Text, | |
| } from 'react-native'; | |
| import Gun from 'gun/gun'; | |
| import 'gun/lib/open'; | |
| import '../extensions/sea'; |
| // jQuery-like syntactic sugar. Only queries for one element. Does not loop over multiple like jQuery | |
| export function $(query) { | |
| if (typeof query === 'undefined') throw 'No query provided to $'; | |
| var el; | |
| if (typeof query.nodeType === 'string') { | |
| el = query; | |
| } else if (typeof query === 'string' && query[0] === '<') { | |
| const container = document.createElement('div'); | |
| container.innerHTML = query; |