hex / rescue

[mark greenlancer]

hello,

there are a few questions after I've read the
manual...

``String.hex´´ converts a hex-string to a decimal
number. But how to convert a decimal number to a
hex value?

If I do

begin
...
rescue
...
end

catches the rescue part every error?
I can also write ``rescue StandardError, SyntaxError, ...


greetings,
mark

 

[Florian Gross]

hello,
Moin!


there are a few questions after I've read the
manual...

``String.hex´´ converts a hex-string to a decimal
number. But how to convert a decimal number to a
hex value?

I think that String#hex should not be used anymore.

I would use "deadbeef".to_i(16) for converting from a String to a number
and 36.to_s(16) for the other way.

If I do

begin
...
rescue
...
end

catches the rescue part every error?
I can also write ``rescue StandardError, SyntaxError, ...

It is the same as 'rescue StandardError' -- if you want to rescue all
errors you should use 'rescue Exception' instead.

greetings,
mark

Regards,
Florian Gross

 

[Martin DeMello]

hello,

there are a few questions after I've read the
manual...

``String.hex´´ converts a hex-string to a decimal
number. But how to convert a decimal number to a
hex value?

number.to_s(16)

It works for other bases too

martin