nickjacob’s gists

nickjacob / safe_eval.js

Created November 13, 2013 00:45

an idea for a safe eval function

	function safe_eval(code, ctx) {
	return (new Function (["window", "undefined"], "try { " + code + " } catch (e){ return e; }"))(ctx);
	}

	function restrict (base, perm) {
	var out = {}, k = null,
	READ = 'read',
	WRITE = 'write',
	RW = 'readwrite';

nickjacob / mini_tpl.js

Last active December 26, 2015 04:29

Newer version of my mini templating

	;(function (window, document, undefined) {
	var m = window.micro = {},
	whiteSpaceRxp = /[\r\n\t\s]/g,
	quotesRxp = /['"]/g,
	attrRxp = /<%=\s([\w_\$\.]+)\s%>/ig;

	// Convert template to use consistent quotes, remove unnecessary whitespace
	// returns: the normalized template string
	function normalizeTemplate(tpl) {
	return tpl.replace(whiteSpaceRxp, ' ').replace(quotesRxp, "'");

nickjacob / is_a.js

Created July 1, 2013 23:01

rly simple self-defining test function snippet

	/* Just define a simple is_a fn and populate it with functions
	* that correspond to the primary JS objects; interface is
	*
	* is_a.array([]) >> true
	*/
	;(function (window, undefined){
	var upFirst = /^(\w)/,
	toS = Object.prototype.toString,
	builtIns = ['Array', 'Object', 'Number', 'String', 'Window', 'RegExp', 'Function'];

nickjacob / framekiller.js

Created June 25, 2013 17:04

really basic framekiller

	;(function (window) {
	if (window.top !== window.self) {
	killFrame();
	}

	var _frame_ = "<html><head><title>Not Allowed</title>\
	</head><body><h1>We don't allow This</h1></body></html>";

	function killFrame() {
	document.open();

nickjacob / anagram.js

Created June 24, 2013 23:27

just simple how 2 find anagrams

	// space complexity: O(n) -- the hashmap
	// time complexity: ~O(2n); iterate both strings once
	// worse case: O(2n)
	function areAnagrams(a, b) {
	var len = a.length, chars = {}, i = 0;
	if (len !== b.length) return false;

	for(; i < len; i++) {
	chars[a[i].toLowerCase()] = true;
	}

nickjacob / parallel.sh

Last active April 11, 2022 22:06

bash parallelization template

	#!/bin/bash
	# Parallelize the execution of a command
	######
	CHUNK_COUNT=0

	parallel_configure () {
	if [ $# -eq 0 ]; then
	echo "usage: <tmp dir> <tmp prefix> <num chunks>"
	fi

nickjacob / appending.js

Last active December 16, 2015 12:59

overview of different ways to append to the DOM

	// inefficient because you call append multiple times
	// this causes a reflow on each call (https://developer.mozilla.org/en-US/docs/Notes_on_HTML_Reflow)
	$('#my-el').append('<div>hi</div>').append('<div>two</div>').append('<div>three</div>');

	// you could just make 1 string of HTML
	var to_append = '<div>hi</div><div>two</div><div>three</div>';
	$('#my-el').append(to_append);

	// or you can use documentFragment;
	// documentFragment is a container for DOM elements that, when you eventually attach it to the DOM, disappears so

nickjacob / script.rb

Created March 25, 2013 21:41

I've been writing a lot of ruby scripts that I want to make more usable/modular, realized I need a common template/api for these things

nickjacob / µTpl.coffee

Last active December 14, 2015 06:39

impl of my picotemplate in coffeescript to see what it'd be like

	__deep = (obj, prop) ->
	for p in prop.split '.'
	if not (p in obj and obj = obj[p])
	return undefined
	obj() if typeof obj is 'function' else obj

	getEscape = (tpl) ->
	qq = "\'" if '"' in tpl else "\""
	(str) -> qq + str + qq

nickjacob / persist_url.coffee

Last active December 14, 2015 06:39

just an idea I wanted to play with; for a searching app, shouldn't the user be able to refresh and get the same parameters in the field/query?

	inputRe = /input\|select\|textarea/i # some browsers do uppercase tagNames; also faster than 3 strcmp

	cache = {}
	elByName = (el) ->
	cache[el.name] ?= document.getElementsByName el.name

	document.addEventListener 'load', (e) ->
	document.addEventListener 'change', (e) ->
	target = e.target

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