Gavin Kistner Phrogz

Phrogz / funcenv.lua

Last active November 5, 2018 16:48

Evaluating the same expression in multiple environments, dynamically

	-- An expression to evaluate
	local expr = 'a + (b or 0)'

	-- Set up two different environments we want our expression to be evaluated against
	local env1,env2 = {a=17}, {a=1,b=25}

	-- Create a wrapper environment with a metatable
	local envmeta = {}
	local envwrap = setmetatable({},envmeta)

Phrogz / intercept.js

Created November 10, 2018 02:17

Intercepting JavaScript prototypal inheritance

	let p = console.log;

	let Interceptor = { hi:_=>"I am "+this.name }

	function Person(name) {
	this.name = name;
	}
	Person.prototype.hi = function() {
	return "Hello, I'm "+this.name
	}

Phrogz / example.js

Created November 11, 2018 20:31

Showcasing some of NeatSerializer's features

	let xml =
	`<r a="42" xmlns:blah="MYURI">
	<e> <!-- my house --> </e>
	<f>9<42</f>
	<blah:dumb>go away</blah:dumb>
	<g><![CDATA[5<7]]></g>
	</r>`;
	let doc = (new DOMParser).parseFromString(xml, 'application/xml');

	console.log(NeatSerializer(doc));

Phrogz / ƒ.js

Last active November 13, 2018 14:30

A useful JS function for running maps on objects; similar to Ruby's Symbol#to_proc &:foo syntax, but more powerful.

	function ƒ(name){
	let v,params=Array.prototype.slice.call(arguments,1);
	return o=>(typeof (v=o[name])==='function' ? v.apply(o,params) : v);
	}

	a = ["foo", "barmitzvah"]
	a.map(ƒ('length')) // [3, 10]
	a.map(ƒ('toUpperCase')) // ["FOO", "BARMITZVAH"]
	a.map(ƒ('slice',1)) // ["oo", "armitzvah"]

Phrogz / test.js

Created November 19, 2018 21:31

Serializing a DOM with an attribute created in an existing namespace

	doc = (new DOMParser).parseFromString('<r xmlns="uri1" xmlns:xx="uri2"><b/></r>', 'text/xml');
	doc.querySelector('b').setAttributeNS('uri2', 'foo', 'bar');
	(new XMLSerializer).serializeToString(doc);
	// "<r xmlns="uri1" xmlns:xx="uri2"><b xmlns:ns14641696="uri2" ns14641696:foo="bar"/></r>"

	doc = (new DOMParser).parseFromString('<r xmlns="uri1" xmlns:xx="uri2"><b/></r>', 'text/xml');
	doc.querySelector('b').setAttributeNS('uri2', 'xx:foo', 'bar');
	(new XMLSerializer).serializeToString(doc);
	// "<r xmlns="uri1" xmlns:xx="uri2"><b xx:foo="bar"/></r>"

Phrogz / webserver.js

Last active October 15, 2019 02:21

Delayed Node.js response

	// Storing response objects for delayed responses
	const responseByMessage = {}

	// A forked process that does some necessary heavy lifting
	const worker = require('child_process').fork(
	require('path').resolve('worker.js'), [],
	{stdio:['inherit', 'inherit', 'inherit', 'ipc']}
	)

	require('http').createServer(function (req, res) {

Phrogz / test.js

Created October 22, 2019 02:35

Rounding to varying precision