Exception Handling/Divide By Zero/NaN Done on One Line

[John Kopanas]

I have the following:

a = (y != 0) ? (x/y) : 0

There must be a sexier way of doing this! Any suggestions?

On a side note... how do we do exception handling on the same line as statement?

a = x/y rescue 0

That does not work but does it make sense? Is it because dividing by
zero does not throw an exception?

Thanks for your help!

Your Friend,

John

--
John Kopanas
(e-mail address removed)

http://www.kopanas.com
http://www.cusec.net
http://www.soen.info

 

[Niko]

a = begin
x / y
rescue ZeroDivisionError
0
end

 

[ara.t.howard]

I have the following:

a = (y != 0) ? (x/y) : 0

There must be a sexier way of doing this! Any suggestions?

On a side note... how do we do exception handling on the same line as
statement?

a = x/y rescue 0

That does not work but does it make sense? Is it because dividing by
zero does not throw an exception?

Thanks for your help!

works for me?

harp:~ > ruby -e' a = 42/0 rescue 42; p a '
42

i think you're doing the right thing with

a = x/y rescue 0

how doesn't it work?

regards.

-a

 

[Rob Biedenharn]

works for me?

harp:~ > ruby -e' a = 42/0 rescue 42; p a '
42

i think you're doing the right thing with


how doesn't it work?

regards.

-a
--
we can deny everything, except that we have the possibility of
being better.
simply reflect on that.
- the dalai lama

If you're not limited to Integers:
ZeroDivisionError: divided by 0
from (irb):1:in `/'
from (irb):1
If either x or y are Float, then dividing by zero isn't an exception.

You could force an exception if you want to get back to an Integer:
FloatDomainError: Infinity
from (irb):7:in `to_i'
from (irb):7FloatDomainError: NaN
from (irb):8:in `to_i'
from (irb):8

-Rob

Rob Biedenharn http://agileconsultingllc.com
(e-mail address removed)

 

[John Kopanas]

I need to keep it as a float... that is my problemo :-(.

If you're not limited to Integers:

ZeroDivisionError: divided by 0
from (irb):1:in `/'
from (irb):1

If either x or y are Float, then dividing by zero isn't an exception.

You could force an exception if you want to get back to an Integer:

FloatDomainError: Infinity
from (irb):7:in `to_i'
from (irb):7
FloatDomainError: NaN
from (irb):8:in `to_i'
from (irb):8

-Rob

Rob Biedenharn http://agileconsultingllc.com
(e-mail address removed)

--
John Kopanas
(e-mail address removed)

http://www.kopanas.com
http://www.cusec.net
http://www.soen.info

 

[Rob Biedenharn]

I need to keep it as a float... that is my problemo :-(.
--
John Kopanas
(e-mail address removed)

http://www.kopanas.com
http://www.cusec.net
http://www.soen.info

Perhaps...

a = x/y

a = 0.0 unless a.finite?

-Rob

Rob Biedenharn http://agileconsultingllc.com
(e-mail address removed)