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Re: Testing validity of numerical content of a string [message #51822 is a reply to message #51744]

Thu, 07 December 2006 10:08

Bob[3]
Messages: 60
Registered: December 2006

Member

On Dec 7, 12:43 pm, "mgal...@gmail.com" <mgal...@gmail.com> wrote:
> The odd thing about this is what IDL will do without complaining. IDL
> will do this without any error:
>
> IDL> help, float('0.0hello5')
> <Expression> FLOAT = 0.00000
>
> but draws the line at:
>
> IDL> help, float('hello5')
> % Type conversion error: Unable to convert given STRING to Float.
> % Detected at: $MAIN$
> <Expression> FLOAT = 0.00000

Looks like Sven's regex is close to what IDL is doing. (except that
both '+' and '-' are accepted and any exponent can have any number of
digits, try e.g. help, float(' +5e00001hello')

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[Message index]

		Testing validity of numerical content of a string By: Y.T. on Wed, 06 December 2006 17:29
		Re: Testing validity of numerical content of a string By: Brian Larsen on Thu, 07 December 2006 10:18
		Re: Testing validity of numerical content of a string By: Bob[3] on Thu, 07 December 2006 10:08
		Re: Testing validity of numerical content of a string By: Michael Galloy on Thu, 07 December 2006 09:43
		Re: Testing validity of numerical content of a string By: Sven Geier on Wed, 06 December 2006 22:21

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