Simple question: compare words

Ruby
1

I want to compare same words in a and b then,
I wrote this,

$ye
$bu
a = “ali”, “bel”, “del”,“en”
b = “ali”,“bas”,“del”,“sx”,“en”,“sz”,“zen”

for xa in a
$ye= xa
end
b.each do |bx|
$bu = bx
if $ye == $bu
puts “#{$ye} and #{$bu}”
end
end

result:
=> en and en

but result is only “en and en”. why the last one?
where is the others ali and del???

2

Ahmet K. wrote:

for xa in a
$ye= xa
end

That is the equivalent to:

$ye = “ali”
$ye = “bel”
$ye = “del”
$ye = “en”

which gives you:

puts $ye

–output:–
“en”

3

On Fri, Sep 18, 2009 at 2:14 PM, Ahmet K. [email protected]
wrote:

end
but result is only “en and en”. why the last one?
where is the others ali and del???

Maybe this will do what you want.

a = [“ali”, “bel”, “del”,“en”]
b = [“ali”,“bas”,“del”,“sx”,“en”,“sz”,“zen”]

p a&b

But, to kind of answer your question,

a = [“ali”, “bel”, “del”,“en”]
b = [“ali”,“bas”,“del”,“sx”,“en”,“sz”,“zen”]

for xa in a
$ye= xa
end

puts $ye #Look here.

p $ye
b.each do |bx|
$bu = bx

puts $ye #And look here.

if $ye == $bu
puts “#{$ye} and #{$bu}”
end
end

Harry

4

Try adding puts $ye after for loop to see what value it contains.

for xa in a
$ye= xa
end
puts $ye

This should give you a clue to your problem.

Then look at the documentation on Ruby arrays class - Ruby provides lots
of lovely ways of processing arrays.

for example try
array & other_array

5

end
but result is only “en and en”. why the last one?
where is the others ali and del???

You get only en, because by the end of this loop:

for xa in a
$ye= xa
end

you have the last item (“en”) in a assigned to $ye and then continue
to compare this last value to the b.
No wonder it finds only “en”.

In Ruby you can find common element in array with &:

a = %w{ali bel del en}
=> [“ali”, “bel”, “del”, “en”]

b = %w{ali bas del sx en sz zen}
=> [“ali”, “bas”, “del”, “sx”, “en”, “sz”, “zen”]

a & b
=> [“ali”, “del”, “en”]

Regards,
Rimantas

6

On Fri, Sep 18, 2009 at 4:08 PM, Ahmet K. [email protected]
wrote:

$ye = “del”
$ye = “en”

which gives you:

puts $ye

–output:–
“en”

Yes, I want that.

No, you don’t. :slight_smile:

You go through all of them but you don’t do anything with them.
Then you compare only the last one to the elements in the other array.

Harry

7

7stud – wrote:

Ahmet K. wrote:

for xa in a
$ye= xa
end

That is the equivalent to:

$ye = “ali”
$ye = “bel”
$ye = “del”
$ye = “en”

which gives you:

puts $ye

–output:–
“en”

Yes, I want that. I want to compare them by one by with other words.
Also, It is not Array it is String.
because if I use $ye.class it gives me String
and I got this error. undefined method `&’ for “en”:String