Comments for PHP to Ruby

Comment on array_flip by RubyLove

RubyLove — Mon, 05 Jul 2010 23:18:27 +0000

Thanks for pointing out the mistake, I have corrected it

Comment on array_flip by bakancs

bakancs — Mon, 05 Jul 2010 22:31:55 +0000

in the first row of ruby code a syntax mistake… but good description!

Comment on is_numeric by Mike DiGioia

Mike DiGioia — Tue, 20 Apr 2010 18:06:37 +0000

class String
def is_numeric?
self.strip =~ /^(-|\+|)[0-9]*(\.[0-9]+)?$/
end
end

p ‘123′.is_numeric?

Comment on array_sum by Josso

Josso — Sun, 07 Mar 2010 18:14:00 +0000

If you’re not using Ruby on Rails, you can easily just make your own .sum

[code]
class Array;
def sum;
inject( nil ) { |sum,x| sum ? sum+x : x };
end;
end
[/code]

The result will be the following:

[code]
[1,2,3].sum # => 6
['1','2','3'].sum # => 123
['a','b','c'].sum # => ‘abc’
[['a'], ['b','c']].sum # => ['a', 'b', 'c']
[/code]

If you’re not sure about the type of the array and only are using it with ints, you might want to replace sum+x with sum.to_i+x.to_i

Comment on lcfirst by RubyLove

RubyLove — Mon, 22 Feb 2010 15:52:14 +0000

Ruby has the ‘minimal code’ approach and makes the semi-colon optional.

I think PHP developers are more comfortable ending with semi-colon - Im not sure if this is a good thing, or if forcing them to move to Ruby standards is better.

Comment on lcfirst by christophe

christophe — Mon, 22 Feb 2010 15:03:24 +0000

Not sure you want the semicolon at the end of the Ruby statement

Comment on crc32 by Cristian Livadaru

Cristian Livadaru — Sat, 13 Feb 2010 20:23:22 +0000

Take care when comparing ruby results with php results. The php manual says:

Because PHP’s integer type is signed, and many crc32 checksums will result in negative integers, you need to use the “%u” formatter of sprintf() or printf() to get the string representation of the unsigned crc32 checksum.

So in case you have a negative number in PHP don’t be afraid, it’s not wrong! Display it with printf(”%u”,$checksum) and compare THAT result o the Ruby result !

Comment on ucwords by Rasidee

Rasidee — Thu, 14 Jan 2010 03:09:29 +0000

puts “ruby is easy”.gsub(/\b\w/){|s|s.upcase}
=> “Ruby Is Easy”

Comment on is_numeric by RubyLove

RubyLove — Sat, 07 Nov 2009 11:31:06 +0000

@jef

Your right, there are some situations where the above code doesnt work - I’ve updated it with a slightly more robust function:

def is_numeric?(num) true if Float(num) rescue false; end

my_string = '1'; puts is_numeric?(my_string);

Comment on is_numeric by jef

jef — Sat, 07 Nov 2009 09:06:18 +0000

ruby -v
ruby 1.8.7 (2008-08-11 patchlevel 72) [i686-linux]

>> “1a”.is_a?(Numeric)
=> false
>> “1″.is_a?(Numeric)
=> false

this info is not correct, do we have to define our own function. please test your code before publishing it!!