Is_number function?

ruby-talk
1

Is there a function in core ruby to determin if a variable is a number
or not?

something like @XX.is_numeric? or is_number(@XX)

···

--
Posted via http://www.ruby-forum.com/.

2

1.is_a?(Numeric) # => true

-- Daniel

···

On Apr 27, 2006, at 11:56 PM, Todd S. wrote:

Is there a function in core ruby to determin if a variable is a number
or not?

something like @XX.is_numeric? or is_number(@XX)

3

Is there a function in core ruby to determin if a variable is a number
or not?

something like @XX.is_numeric? or is_number(@XX)

>> "hello".is_a? Numeric
=> false
>> 3.is_a? Numeric
=> true

Hope that helps.

James Edward Gray II

···

On Apr 27, 2006, at 4:56 PM, Todd S. wrote:

4

Or Numeric === 1

···

On Apr 27, 2006, at 5:58 PM, Daniel Harple wrote:

1.is_a?(Numeric) # => true

5

Daniel Harple wrote:

1.is_a?(Numeric) # => true

-- Daniel

Thank you. I thought it was something to that effect.
Unfortunately it doesn't seem to work for me.

However I find that the above returns:

1.is_a(Numeric)
NoMethodError: undefined method `is_a' for 1:Fixnum
        from (irb):4

while, 1.is_a? Numeric does indeed return true.

···

from :0

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Posted via http://www.ruby-forum.com/.

6

Don't forget the question mark.

···

On 4/27/06, Todd S. <tgate@mypublic.net> wrote:

Daniel Harple wrote:

> 1.is_a?(Numeric) # => true
>
> -- Daniel

Thank you. I thought it was something to that effect.
Unfortunately it doesn't seem to work for me.

However I find that the above returns:

1.is_a(Numeric)
NoMethodError: undefined method `is_a' for 1:Fixnum
        from (irb):4
        from :0

while, 1.is_a? Numeric does indeed return true.