nickjacob’s gists

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 / 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 / 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 / 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 / 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 / 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 / label-output.sh

Created January 24, 2014 05:44

bash function to prepend text to output of script (example use in here too)

	function label_stream()
	{
	perl -sne '$\|=1; print "[$cmd]\t$_"' -- -cmd="$1"
	}

	# example use
	ls -lafh . \| label_stream "ls"

	# output
	[ls] drwxr-xr-x 6 nickjacob staff 204B Nov 11 2012 Processing/

nickjacob / coinbase-price

Created January 28, 2014 20:46

check and update buy/sell price on coinbase

	#!/usr/bin/env ruby
	# get coinbase price
	###
	require 'coinbase'
	require 'optparse'

	# your API key - https://coinbase.com/docs/api/authentication
	COINBASE_API = ''
	UP_ARROW = "\u25B2".encode('utf-8')
	DOWN_ARROW = "\u25BC".encode('utf-8')

nickjacob / leveldb_merge.pl

Created March 13, 2014 08:07

merge a series of level dbs to provide an output db of a specified length

	#!/usr/bin/env perl
	use strict;
	use warnings;
	use Tie::LevelDB;

	sub foreach_key {
	my ($db_name, $block) = @_;
	my $db = new Tie::LevelDB::DB($db_name);
	my $it = $db->NewIterator;

nickjacob / upgrade_starcluster.sh

Created March 22, 2014 23:39

script to safely upgrade starcluster & dependencies

Nick Jacob nickjacob