__builtin_popcount - Returns the number of 1 bits
1 => 00000000000000000000000000000001 => 1
2147483648 => 10000000000000000000000000000000 => 1
2147500033 => 10000000000000000100000000000001 => 3
__builtin_clz - Returns leading zeros
1 => 00000000000000000000000000000001 => 31
2147483648 => 10000000000000000000000000000000 => 0
2147500033 => 10000000000000000100000000000001 => 0
__builtin_ctz - Returns trailing zeros
1 => 00000000000000000000000000000001 => 0
2147483648 => 10000000000000000000000000000000 => 31
2147500033 => 10000000000000000100000000000001 => 0
Add this line to your application's Gemfile:
gem 'bitcount'
And then execute:
$ bundle install
Or install it yourself as:
$ gem install bitcount
require 'bitcount'
Bitcount.popcount(1)
=> 1
Bitcount.nlz(1)
=> 63
Bitcount.ntz(1)
=> 0
or
require 'bitcount/integer'
1.popcount
=> 1
1.nlz
=> 63
1.ntz
=> 0
you can specify a different layout, but if the layout doesn't match your platform a slower version will be used
1.nlz(32)
=> 31
Bitcount::Native.layout_size
=> 64
Bug reports and pull requests are welcome on GitHub at https://github.com/ahorek/bitcount.
The gem is available as open source under the terms of the MIT License.
FAQs
Unknown package
We found that bitcount demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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