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array_combine
Posted on July 23rd, 2009 2 commentsThe array_combine() function creates an associative array (hash) by using one array for keys and another for values.
PHP
$a = array('python', 'lisp', 'perl'); $b = array('PY', 'LI', 'PE'); $c = array_combine($a, $b); print_r($c); => /* Array ( [python] => PY [lisp] => LI [perl] => PE ) */
To replicate this functionality in Ruby, we need to use a Hash object, since arrays in Ruby don’t use associative key/value pairs.
Since there is no exact equivalent of to the array_combine() function in Ruby, we manually create a hash from two different arrays.
Ruby
p1 = ['python', 'lisp', 'perl']; p2 = ['PY', 'LI', 'PE']; # initialize the hash combined_hash = {} # build the hash from 2 different arrays p2.each_with_index do |val, key| combined_hash[p1[key]] = val end # print resulting hash p combined_hash => # ["python"=>"PY", "lisp"=>"LI", "perl"=>"PE"]
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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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array_change_key_case
Posted on March 28th, 2009 No commentsThis function changes all keys in an array by returning an array with all keys from argument lowercased or uppercased. Numbered indices are left as is.
PHP
$input_array = array('FirSt' => 1, 'SecOnd' => 4); print_r( array_change_key_case($input_array, CASE_UPPER) ); // => array('FIRST' => 1, 'SECOND' => 4);
To replicate this functionality in Ruby, we need to use a Hash object, since arrays in Ruby don’t use associative key/value pairs.
Ruby
hash = {'FirSt' => 1, 'SecOnd' => 4} result = hash.inject({}) do |hash, keys| hash[keys[0].upcase] = keys[1] hash end p result # => { 'FIRST' => 1, 'SECOND' => 4 }
PHP, Ruby arrays, hash, keys, lower case, upper case