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- Subject: Re: tostring(e,[base])
- From: Doug Currie <doug.currie@...>
- Date: Tue, 26 Jul 2011 17:06:38 -0400
On Jul 26, 2011, at 11:29 AM, Petite Abeille wrote:
> FWIW, here is a little tobase function:
...
Thank you for the example.
Some people may prefer to change
> local aNumber = abs( floor( tonumber( aNumber ) ) )
to
> local aNumber = floor ( abs( tonumber( aNumber ) ) )
for symmetry (as numbers are normally printed).
Original version:
> print( tobase( 6700417.01, 36 ), tonumber( tobase( 6700417.01, 36 ), 36 ) )
3ZM2P 6700417
> print( tobase( -6700417.01, 36 ), tonumber( tobase( -6700417.01, 36 ), 36 ) )
-3ZM2Q 1.8446744073703e+19
Revised version:
> print( tobase( 6700417.01, 36 ), tonumber( tobase( 6700417.01, 36 ), 36 ) )
3ZM2P 6700417
> print( tobase( -6700417.01, 36 ), tonumber( tobase( -6700417.01, 36 ), 36 ) ) -3ZM2P 1.8446744073703e+19
This also shows that tonumber (in Lua 5.1.4) has trouble with negative number strings not in base 10.
> return tonumber('-3ZM2P', 36)
1.8446744073703e+19
> return tonumber('-3456', 10)
-3456
> return tonumber('-1010', 2)
1.844674407371e+19
e
