reset

The reset() function in PHP sets the internal pointer of an array to its first element. However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s reset() function.

pos

The pos() function is only an alias of current, which returns the key and value of the element the current array pointer is pointing to. However since Ruby doesn’t have an internal array pointer, this function does not have a Ruby equivalent.

For further information about pos(), see current().

current

The current() function in PHP returns the key and value of the element the current array pointer is pointing to. However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s current() function.

key

The key() function in PHP returns the index element of the element the current array pointer is pointing to. However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s key() function.

end

The end() function in PHP moves the internal array pointer to the last element in the array. However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s end() function. However Ruby does have the Array::last() method which returns the last element of an array.

PHP

$programming = array('java', 'ruby', 'python', 'php');
$language = end($programming);
print_r($language);
// => php

Ruby

programming = ['java', 'ruby', 'python', 'php'];
language = programming.last;
puts language;
=> # php

next

The next() function in PHP moves the internal array pointer one place forward. However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s next() function.

prev

The prev() function in PHP moves the internal array pointer to the previous element (rewinds). However in Ruby, there is no internal array pointer - as such Ruby doesn’t have an equivalent to PHP’s prev() function.

range

The range() function creates an array containing a range of elements in PHP, however in Ruby the Range object is used to handle ranges of integers or strings.

PHP

$chars = range('a', 'c');
print_r($chars);
// => array(0 => 'a', 1 => 'b', 2 => 'c')

Ruby

chars = 'a'..'c'
chars.each {|item| print "#{item}, " } 
# => a, b, c,

array_combine

The 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"]

array_push

The array_push() function pushes elements onto the end of an array (acting in the opposite way to array_pop).

PHP

$programming = array('java', 'ruby', 'python', 'php');
array_push($programming, 'asp');
print_r($programming);
=> /* 
Array
(
    [0] => java
    [1] => ruby
    [2] => python
    [3] => php
    [4] => asp
)
*/

Ruby

programming = ['java', 'ruby', 'python', 'php'];
programming.push('asp');
=> # ["java", "ruby", "python", "php", "asp"]