How to break out deeply nested loops? (newbie)

[Talha Oktay]

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I sometimes need to break out, next or redo deeply nested loops in differen=
t
levels instead of the innermost enclosing scope. Is there a facility to
label blocks or loops and redo, next or break to the labeled blocks or
loops as in some other programming languages?

Thanks in advance.

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[Chris Alfeld]

Not nicely.

This is discussed in the Pickaxe. For example

catch "BreakOuterLoop" do
for i in 1..10
print "out #{i}\n"
for j in 1..10
print "in #{j}\n"
throw "BreakOuterLoop" if i+j > 16
end
end
end

 

[James Britt]

I sometimes need to break out, next or redo deeply nested loops in different
levels instead of the innermost enclosing scope. Is there a facility to
label blocks or loops and redo, next or break to the labeled blocks or
loops as in some other programming languages?

Thanks in advance.

throw/catch

http://www.ruby-doc.org/core/classes/Kernel.html#M001972

 

[Simon Kröger]

I sometimes need to break out, next or redo deeply nested loops in different
levels instead of the innermost enclosing scope. Is there a facility to
label blocks or loops and redo, next or break to the labeled blocks or
loops as in some other programming languages?

Thanks in advance.

You may use throw, catch or continuations (for the fun of it) or just
wrap some of your inner loops in their own method and use return.
(i prefer the last version most of the time)

cheers

Simon