jnvm’s gists

jnvm / privatizer.js

Last active February 7, 2018 04:49

privatizer.js

	/*
	given goals:
	https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md#why-is-encapsulation-a-goal-of-this-proposal
	& given example:
	https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md#how-can-you-provide-hidden-but-not-encapsulated-properties-using-symbols

	Hidden & encapsulated values can be shared with same instances via WeakMap & Proxies
	Undesirable access via callbacks passed in & whatnot just need to be defended against.
	One could imagine wanting to allow callbacks read access to privates but not write, doable w/a proxy & setup condition.

jnvm / a-privatizer.js

Last active February 7, 2018 04:51

a privatizer

	/*
	given goals:
	https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md#why-is-encapsulation-a-goal-of-this-proposal
	& given example:
	https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md#how-can-you-provide-hidden-but-not-encapsulated-properties-using-symbols

	Hidden & encapsulated values can be shared with same instances via WeakMap & Proxies
	Undesirable access via callbacks passed in & whatnot just need to be defended against.
	One could imagine wanting to allow callbacks read access to privates but not write, doable w/a proxy & setup condition.

jnvm / frozenWeakmapEncapsulation.js

Last active February 5, 2018 06:18

frozen weakmap encapsulation

	/*
	https://github.com/tc39/proposal-class-fields/blob/master/PRIVATE_SYNTAX_FAQ.md#how-can-you-model-encapsulation-using-weakmaps
	"There's a potential pitfall with this approach, though"
	...so prevent it!
	*/
	const Person = (function(){
	const privates = new WeakMap;
	let ids = 0;
	return class Person {
	constructor(name, makeGreeting) {

jnvm / dontworry.js

Last active August 5, 2016 05:32

weird looking js

	//guess what this outputs
	var
	varᅚ = 1,
	ᅛ = 4,
	ᅜ = 2,
	ˋhey,ˋ=`B ‮‮`,<!--#wtf
	donˈtᅠworryǃ="‮("
	console.log(ˋhey,ˋ + donˈtᅠworryǃ + varᅚᅛᅜ)

jnvm / samebind.js

Last active August 3, 2016 01:20

in which jnvm makes a fool of himself claiming: bind modifies function, doesn't return new one

	var echo=function(){
	var echoes=echo.count\|\|10
	while(echoes--) this.makeNoise()
	}

	var dog={
	sound:"woof",
	makeNoise:function(){ console.log(this.sound) },
	}

jnvm / obj-hash-test.js

Created July 18, 2016 04:19

hash test for https://twitter.com/kuvos/status/751685187831001088

jnvm / fiddle.html

Created July 7, 2016 02:46

SNES-style gamepad controller. Implement interaction as needed.

	<html>

	<head>
	<script src="https://wzrd.in/standalone/nipplejs"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/peerjs/0.3.14/peer.min.js"></script>
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
	</head>
	<body>
	<style>
	body {

jnvm / ShowValidStartingIdentifierChars.js

Created July 5, 2016 05:41

live-test & show valid starting identifier characters in js.

	+function ShowValidStartingIdentifierChars(){
	var validStarters={}
	,max=130000
	,group=5000
	for(var i=0;i<max;i++){
	try{
	var s=String.fromCodePoint(i)
	eval(`let ${s}=1`)
	validStarters[s]=1
	}

jon jnvm