> The page is more of a dictionary of language constructs.
Which would come incredibly useful if you wanted to write a polyglot program.
Why else would you use a reference like this? If you wanted to learn a language, or had to hack something in a language you don't know, you'll be better off using resources specific to given language(s).
One would use this when writing a new program or modifying an existing one in a language one doesn't know, but when one does know another one well. Seems quite obvious.
Which would come incredibly useful if you wanted to write a polyglot program.
Why else would you use a reference like this? If you wanted to learn a language, or had to hack something in a language you don't know, you'll be better off using resources specific to given language(s).