From: Jakub Travnik <j.travnik@...>
Date: 2001-12-07T09:14:17+09:00
Subject: [ruby-talk:27769] Re: syntax across languages


It is very nice.

I have found a problem.
in if_then_else section:

if c then a else b     Haskell, merd, OCaml, Ruby

this is not correct, Ruby uses 'end' keyword to end if.
and there are more ways possible in Ruby:

if c then a else b end
if c; a else b end
if c
a else b end

'then' may be replaced with ';' or newline

'end' is usefull to avoid dangling 'else' problems.


Some additions:
---------------

package scope:
..     pascal(delphi/kylix)

type (as in retyping):
type(expr)    pascal(delphi/kylix)

record selector:
.. pascal(delphi/kylix)

list flattening:
flatten  ruby(*)

(*) flatten is method of Array, not a keyword

array indexing:
a[i]    pascal(delphi/kylix)

string concatenation
+     pascal(delphi/kylix)

ascii to character:
chr   pascal(delphi/kylix)

character to ascii:
ord   pascal(delphi/kylix)

false value:
false pascal(delphi/kylix), Ruby(**)

(**) in ruby both nil and false means false value, all
other means true

true value:
true  pascal(delphi/kylix)

logical or:
or    pascal(delphi/kylix)

logical and:
and   pascal(delphi/kylix)

power:
power   delphi/kylix

square root / exponential / absolute value:
sqrt/exp/abs  pascal(delphi/kylix)

trigonometry:
cos/sin/tan  pascal(delphi/kylix)

logarithm:
ln     pascal(delphi/kylix)
log10  delphi/kylix

modulo:
mod   pascal(delphi/kylix)



Jakub Travnik
jabber://jtra@jabber.com