[squeak-dev] The Inbox: Kernel-ct.1412.mcz
leves at caesar.elte.hu
Fri Sep 10 01:24:13 UTC 2021
On Tue, 7 Sep 2021, commits at source.squeak.org wrote:
> A new version of Kernel was added to project The Inbox:
> ==================== Summary ====================
> Name: Kernel-ct.1412
> Author: ct
> Time: 7 September 2021, 11:54:32.77151 pm
> UUID: ca064a0e-13a5-f64f-ac9e-91ae045569a7
> Ancestors: Kernel-eem.1408
> Adds non-performant but existing implementation of #isPowerOfTwo on Number. Now 16s isPowerOfTwo works as expected, too. Complements Kernel-nice.1377.
> =============== Diff against Kernel-eem.1408 ===============
> Item was added:
> + ----- Method: Number>>isPowerOfTwo (in category 'testing') -----
> + isPowerOfTwo
> + ^ self strictlyPositive and: [(self log2 \\ 1) isZero]!
It's possible to create a Fraction for which that expression returns true.
For example (1 << 54 - 1) / (1 << 53).
However, the method should return false for all Fractions due to
I pushed a simpler and probably faster solution based on inheritance to
the Inbox. See Kernel-ul.1410.
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