Listing Ruby keywords

[John Maclean]

Is there a simple way to find out all or most of the built-in keywords? I know that if a keyword's in a ruby script that the debugger will tell you but I'd like to know before hand, in other words when I'm actually writing the scripts.

 

[George Ogata]

Is there a simple way to find out all or most of the built-in
keywords? I know that if a keyword's in a ruby script that the
debugger will tell you but I'd like to know before hand, in other
words when I'm actually writing the scripts.

Can't use an editor with syntax coloring? ;-)

The emacs ruby-mode colors these as keywords:

"alias"
"and"
"begin"
"break"
"case"
"catch"
"class"
"def"
"do"
"elsif"
"else"
"fail"
"ensure"
"for"
"end"
"if"
"in"
"module"
"next"
"not"
"or"
"raise"
"redo"
"rescue"
"retry"
"return"
"then"
"throw"
"super"
"unless"
"undef"
"until"
"when"
"while"
"yield"

And these as special variables:

nil, self, true, false, __FILE__, __LINE__

Aside from that I can only think of:

BEGIN, END, defined?

You could also try searching the list archives.

HTH.

 

[Wilson Bilkovich]

Can't use an editor with syntax coloring? ;-)

The emacs ruby-mode colors these as keywords:

"alias"
"and"
"begin"
"break"
"case"
"catch"
"class"
"def"
"do"
"elsif"
"else"
"fail"
"ensure"
"for"
"end"
"if"
"in"
"module"
"next"
"not"
"or"
"raise"
"redo"
"rescue"
"retry"
"return"
"then"
"throw"
"super"
"unless"
"undef"
"until"
"when"
"while"
"yield"

And these as special variables:

nil, self, true, false, __FILE__, __LINE__

Aside from that I can only think of:

BEGIN, END, defined?

You could also try searching the list archives.

HTH.

Or you could make a script that tries to assign to local variables
with every possible name combination, and keeps track of which ones
throw exceptions.

 

[Gene Tani]

Can't use an editor with syntax coloring? ;-)

The emacs ruby-mode colors these as keywords:

"alias"
"and"
"begin"
"break"
"case"
"catch"
"class"
"def"
"do"
"elsif"
"else"
"fail"
"ensure"
"for"
"end"
"if"
"in"
"module"
"next"
"not"
"or"
"raise"
"redo"
"rescue"
"retry"
"return"
"then"
"throw"
"super"
"unless"
"undef"
"until"
"when"
"while"
"yield"

And these as special variables:

nil, self, true, false, __FILE__, __LINE__

Aside from that I can only think of:

BEGIN, END, defined?

The Nutshell doesn't list "raise" as a keyword

class Blah
def testraise
raise=3
"raise local var: #{raise}"
end
end

a=Blah.new()
p a.testraise # =>"raise local var: 3"

and i always wondered why public, protected and private weren't
keywords also

 

[Gene Tani]

Or you could make a script that tries to assign to local variables
with every possible name combination, and keeps track of which ones
throw exceptions.

or code like mental

http://moonbase.rydia.net/mental/blog/programming/avoiding-ruby-keywords.html

 

[George Ogata]

The Nutshell doesn't list "raise" as a keyword

class Blah
def testraise
raise=3
"raise local var: #{raise}"
end
end

a=Blah.new()
p a.testraise # =>"raise local var: 3"

and i always wondered why public, protected and private weren't
keywords also

Because they're not really keywords; they're methods of Module. Try
ri on them...

On closer examination, catch, fail, raise and throw aren't keywords
either. It's handy to have them highlighted though.

 

[Devin Mullins]

Or you could make a script that tries to assign to local variables
with every possible name combination, and keeps track of which ones
throw exceptions.

Or you could bookmark http://phrogz.net/ProgrammingRuby/language.html#names

raise, public, private, and protected aren't keywords -- they're
methods. As such, you *can* make variables with their names, and use
self.xxx to invoke the method.

Devin

 

[Ryan Davis]

Is there a simple way to find out all or most of the built-in
keywords? I know that if a keyword's in a ruby script that the
debugger will tell you but I'd like to know before hand, in other
words when I'm actually writing the scripts.

http://www.zenspider.com/Languages/Ruby/QuickRef.html#3