From: Robert Klemme <shortcutter@...>
Date: 2007-10-31T22:06:46+09:00
Subject: Re: Can we define data types explicitly?

2007/10/31, Shuaib Zahda <shuaib.zahda@gmail.com>:
> Hi
>
> I am working on application that emphasizes on the data types of the
> data. The application reads a line from the user by the prompt. then it
> divides the entry into parts based on comma separator.
> e.g
>
> f = gets
> <user input> "apple", 5, 8.9, "red"
>
> after i split them in an array
>
> arr = f.split(", ")
>
> they will be all converted into string and stored in arr as elements of
> array.
> I need to check whether the type of 5 is integer or not, 8.9 is float,
> etc. In this case it is fine  but in the case that the user keys in
> string instead of float. the methods to_i, to_f will convert the string
> into 0 and assume it is of that type.
>
> Is there any mechanism that allows me to check the data type ?

13:57:22 /cygdrive/c/SCMws/RKlemme$ ruby -e 'Integer("rubbish")'
-e:1:in `Integer': invalid value for Integer: "rubbish" (ArgumentError)
        from -e:1
14:06:07 /cygdrive/c/SCMws/RKlemme$

Kind regards

robet

-- 
use.inject do |as, often| as.you_can - without end