Do you know of a good quick reference guide for a number of programming languages? [closed]

Question

In the course of my job I am maintaining code in a number of programming languages (listed below). As I haven't mastered most of them I keep forgetting the differences in syntax between them. Is there a good reference which covers (preferably for all of them on a side of A4, in a table) the basic features of the language e.g.

• conditional statements (if (something) {} or not?)
• comparison operators (is it =, ==, or sometimes ===? Is it <> or !=)
• Are variables case sensitive?
• How do you concatenate strings? ( . & or + ?)

I would like this for:

• Python
• PHP
• Perl
• Javascript
• ASP

Answer 1

DZone has quite a few.