varnie’s gists

varnie / changeTdStyle.html

Created September 8, 2011 11:09

an example of changing a style of td using javascript and DOM

	<html>
	<head>
	<title>getElementById example</title>

	<style>
	table .c { color: red }
	.a.c {color: green}
	</style>

	<script type="text/javascript">

varnie / checkBraces.php

Created September 8, 2011 11:08

varnie / dateCheckUpdated.rb

Created September 7, 2011 08:11

A function checking the date is valid

	=begin rdoc
	Checks that the supplied date has the correct date format '#YYYY:MM:DD' with the separators both be either - or : or /.
	A year cannot start from the zero, while a month and a day can.
	Performs additional checkings that the date is valid.
	=end
	def checkDateUpdated(aDate)
	matched =
	%r{
	(?<year>
	(^ #no input before the start

varnie / dateCheck.rb

Created September 7, 2011 05:49

A regexp for date validation

	=begin rdoc
	Checks that the supplied date has the correct date format '#YYYY:MM:DD' with the separators both be either - or : or /.
	A year cannot start from the zero, while a month and a day can.
	Doesn't check that the supplied day is within the specified month's day range. It may be further improved.
	=end
	def checkDate(aDate)
	%r{
	(?<year>
	(^ #no input before the start
	[1-9]\d{3} #a year cannot start from the zero

varnie / sentenceMixer.php

Created September 4, 2011 16:14

Yet another programming challenge to blow up your mind (PHP version).

	<?php

	$src = '{Пожалуйста\|Просто} сделайте так, чтобы это {удивительное\|крутое\|простое} тестовое предложение {изменялось {быстро\|мгновенно} случайным образом\|менялось каждый раз}';

	while (preg_match("/\{([^\{\}]*)\}/", $src, $matches)){
	$alt_items = explode("\|", $matches[1]);
	$item = $alt_items[array_rand($alt_items)];
	$src = str_replace($matches[0], $item, $src);
	}

varnie / SentenceMixer.java

Created September 3, 2011 13:08

Yet another programming challenge to blow up your mind (Java version)

	import java.text.CharacterIterator;
	import java.text.StringCharacterIterator;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.Random;
	import java.util.Stack;

	public class SentenceMixer {

	private static class Item {

varnie / sentence_challenge.rb

Created August 31, 2011 15:31

Yet another programming challenge to blow up your brains

	# coding: utf-8

	src = '{Пожалуйста\|Просто} сделайте так, чтобы это {удивительное\|крутое\|простое} тестовое предложение {изменялось {быстро\|мгновенно} случайным образом\|менялось каждый раз}';
	r = Regexp.new(/\{[^\{\}]*\}/)

	while (match = r.match(src)) do
	match.length.times { \|i\|
	offsets = match.offset(i)
	chunk = src[offsets[0],offsets[1]-offsets[0]]
	bracelessChunk = chunk[1..-2] #remove leading '{' and trailing '}'

varnie / pool.rb

Created August 8, 2011 13:20

Thread pool taken from http://burgestrand.se/code/ruby-thread-pool/

	require 'thread' #taken from http://burgestrand.se/code/ruby-thread-pool/

	class Pool
	def initialize(size)
	@size=size
	@jobs = Queue.new
	@pool = Array.new(@size) do \|i\|
	Thread.new do
	Thread.current[:id] = i
	catch(:exit) do

varnie / Ruby images downloader

Created August 4, 2011 16:09

Three ways of handling images from the net using Ruby

	#!/usr/bin/env ruby
	require 'open-uri'
	require 'pool' #taken fron http://burgestrand.se/code/ruby-thread-pool/

	IMG_REGEXP = /\<img[^(src)]src=(\"\|\')((http:\/\/)?[\w\.\/:-]+)\1[^\\>]\\?\>/
	VALID_IMAGE_EXTENSION_REGEXP = /.*\.(gif\|tif\|png\|jpeg\|jpg)$/

	def image_extension_correct?(image)
	not image.nil? and image =~ VALID_IMAGE_EXTENSION_REGEXP
	end

varnie / arrayUsage.rb

Created July 31, 2011 17:11

An intro to Arrays usage in Ruby

	require 'benchmark'

	NUM_PERSONS = 100_000#10_000_000

	class Person < Struct.new(:sex, :age, :height, :index, :money)
	end

	class Array
	def search(options={})
	options.delete_if {\|k,v\| not Person.members.include?(k.to_s)}

Sergei A. varnie