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explode
Posted on May 29th, 2009 No commentsThe explode function takes 2 parameters - the first is the delimiter, and the second is the string to be exploded. It returns an array of strings, each of which is a substring of the original, formed by splitting the original string on boundaries formed by the string delimiter.
PHP
$my_string = 'perl, python, java'; $array = explode(', ', $my_string); var_dump($a); /* Array ( [0] => perl [1] => python [2] => java ) */
Ruby
my_string = 'perl, python, java'; puts my_string.split(', '); # => ["perl", "python", "java"]
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shuffle
Posted on May 26th, 2009 No commentsRandomizes the order of the elements in an array.
PHP
$a = array('a', 'b', 'c', 'd'); shuffle($a); print_r($a); /* Array ( [0] => d [1] => b [2] => c [3] => a ) */
Ruby
a = [ "a", "b", "c", "d" ]; puts a.sort_by{ rand }; # => ["d", "b", "c", "a"]
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str_pad
Posted on May 23rd, 2009 No commentsstr_pad allows a string to be added to a particular length using another string.
PHP
echo str_pad('Hi', 5); // => 'Hi ' echo str_pad('Hi', 5, '+'); // => 'Hi+++' echo str_pad('78', 5, '0', STR_PAD_LEFT); // => '00078'
Instead of padding a string, in Ruby we justify a string to the left or right.
Ruby
puts "Hi".ljust(5); # => 'Hi ' puts "Hi".ljust(5, '+'); # => 'Hi+++' puts "78".rjust(5, '0'); # => '00078'
To pad both sides of a string, we need to use a combination of ljust and rjust.
PHP
echo str_pad('Special', 11, '*', STR_PAD_BOTH); // => '**Special**'
Ruby
puts "Special".ljust(9).rjust(11); # => '**Special**'
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time
Posted on May 20th, 2009 No commentsReturns the current Unix timestamp (epoch).
PHP
echo time(); // => 1242744141
Ruby
puts Time.now.to_i; # => 1242744141
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microtime
Posted on May 17th, 2009 1 commentReturns the current Unix timestamp (epoch) with microseconds.
PHP
echo microtime(); // => 0.63928794 1242744141
Ruby
epoch_mirco = Time.now.to_f; epoch_full = Time.now.to_i; epoch_fraction = epoch_mirco - epoch_full; puts epoch_fraction.to_s + ' ' + epoch_full.to_s; # => 0.639287948608398 1242744141
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md5_file
Posted on May 14th, 2009 No commentsThe md5_file() function calculates the md5 hash of a file.
PHP
$my_file = '/home/ali/article.txt'; echo md5_file($my_file); // => 745d3dfb68af1b1384aea0125aae5c3f
MD5 encryption can be done using the Digest::MD5 class in Ruby, but to generate a hash for a file, we need to read it’s contents into a variable (string) first.
Ruby
require 'digest/md5'; my_string = File.read('/home/ali/article.txt'); print Digest::MD5.hexdigest(my_string); # => 745d3dfb68af1b1384aea0125aae5c3f
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sha1_file
Posted on May 11th, 2009 No commentsThe sha1_file() function calculates the sha1 hash of a file.
PHP
$my_file = '/home/ali/article.txt'; echo sha1_file($my_file); // => bef6b2b56f70eb6f2c250e00c855f4c0120832aa
Sha1 encryption can be done using the Digest::SHA1 class in Ruby, but to generate a hash for a file, we need to read it’s contents into a variable (string) first.
Ruby
require 'digest/sha1'; my_string = File.read('/home/ali/article.txt'); print Digest::SHA1.hexdigest(my_string); # => bef6b2b56f70eb6f2c250e00c855f4c0120832aa
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sha1
Posted on May 8th, 2009 No commentsThe sha1() function calculates the sha1 hash of a string.
PHP
echo sha1('apple'); // => d0be2dc421be4fcd0172e5afceea3970e2f3d940
Sha1 encryption can be done using the Digest::SHA1 class in Ruby. To use this class, we need to require the Digest library first…
Ruby
require 'digest/sha1'; print Digest::SHA1.hexdigest('apple'); # => d0be2dc421be4fcd0172e5afceea3970e2f3d940
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md5
Posted on May 5th, 2009 No commentsThe md5() function calculates the md5 hash of a string.
PHP
echo md5('apple'); // => 1f3870be274f6c49b3e31a0c6728957f
MD5 encryption can be done using the Digest library in Ruby. To use the Digest library, just require it…
Ruby
require 'digest/md5'; print Digest::MD5.hexdigest('apple'); # => 1f3870be274f6c49b3e31a0c6728957f
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error_log
Posted on May 2nd, 2009 No commentsThe error_log() function sends an error message to the web server’s error log, a TCP port or to a file (usually the web server’s error log).
PHP
error_log('My error message'); // => My error message
error_log() is probably one of the most common and convenient ways to debug PHP scripts, without having to install a full PHP debugger. As such, it is very popular with developers, often logging variables part way through a script, to see if the values are what they expect. Although Ruby doesn’t provide such a convenient global function, it does provide the Logger class which is much more powerful.
Ruby
require('Logger'); Logger.new('/var/log/httpd/error.log').error('My error message'); # => ERROR -- : My error message
