hipertracker

<?php

# PHP does not recognize long int.
# It recognize only signed int32.

var_dump(is_float(pow(2,30)));  # false
var_dump(is_float(pow(2,31)));  # true (sic!)

# Even if PHP keep long int internaly as floats,
# it displays them in inconsistent way:

hipertracker

<?php
# What is more readible?

# version 1:

$args[] = '"'.mysql_escape_string(preg_replace("/^'(\d+)$/", '$1', $arg)).'"';


# version 2:

hipertracker

Response for http://tempe.st/2007/05/the-battle-of-the-languages-part-ii/comment-page-1

Platform: MacPro 2 x Xeon 2.8GHz, MAac OS-X 10.6.2, Java 1.6.0_17

Lua 5.1.4  = 1.89 s.
JRuby 1.4 (--fast --server) = 4.53 s.
Python 2.6.4 = 5.61 s.
Python 3.1 = 6.15 s.
MacRuby 0.5 = 6.62 s.
Ruby 1.9.1p373 = 10.37 s.

hipertracker

<?php
class Source {}

class DbSource extends Source {
    function __construct($cfg) {
        $this->conn = new PDO($cfg['adapter'].":dbname=".$cfg['db'].";host=".$cfg['host'], $cfg['user'], $cfg['password']);
    }
    // Mapping properties - db_columns
    private function property_names() {
        $result = array();

hipertracker

MacBook Pro, Core Duo 2, 2.8GHz
Mac OS-X 10.6.5

$ cat fib.rb
def fib(n)
  return n if n <= 1
  fib(n - 1) + fib(n - 2)
end
require "benchmark"
Benchmark.bm do |make|

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Złożoność jezyka
 
Ansi C: http://flickr.com/photos/nicksieger/281055530/
Ruby: http://flickr.com/photos/nicksieger/280661836/in/photostream/
Python: http://flickr.com/photos/nicksieger/281055485/
JavaScript: http://flickr.com/photos/nicksieger/280662871/in/photostream/
Java: http://flickr.com/photos/nicksieger/280662707/in/photostream/

Diassemblacja kodu

hipertracker

# z wątku http://www.rubyonrails.pl/forum/t112-Zamiana-pojedynczych-znakow

require 'iconv'

def pl2ascii(s)
  ascii = "acelnoszzACELNOSZZ"
  cep = "\271\346\352\263\361\363\234\277\237\245\306\312\243\321\323\214\257\217" 
  s = Iconv.new("cp1250", "UTF-8").iconv(s)
  s.tr!(cep,ascii)  
end

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# Pythonic Unicode support

import re
pattern = re.compile(r'(\w+)', re.U|re.I)      
msg = unicode('zażółć gęślą jaźń', 'utf-8')
for word in re.findall(pattern, msg): 
    print '#', word

# zażółć
# gęślą

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#!ruby19
# encoding: utf-8

alias :λ :lambda
π = Math::PI

hello_world = λ{|subject| "Hello, #{subject}! π is #{π}"}

puts hello_world["world"] # => Hello, world! π is 3.14159265358979
puts "λπ".length # => 2

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Dynamic accessors

<?php

error_reporting(E_ALL);

class String {
    static public function capitalize($s) {
        if (!empty($s)) return $s = strtoupper($s[0]).strtolower(substr($s,1));            
        return $s;