I have a formula in JS that uses the bitwise NOT operator.
~~(n/m + 0.5) * m;
How do I write the same expression in ruby? There is no bitwise NOT operator in ruby.
I have a formula in JS that uses the bitwise NOT operator. ~~(n/m +
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I have a formula in JS that uses the bitwise NOT operator.
~~(n/m + 0.5) * m;
How do I write the same expression in ruby? There is no bitwise NOT operator in ruby.
I believe the same expression in Ruby would be
(n/m + 0.5).to_i * m, or, alternatively,Integer(n/m + 0.5) * m.It looks like the doubled bitwise complement there is really being used to truncate the decimal part of the calculation, in order to compute the nearest n such that n is a multiple of m. (In another language, I would say “convert to integer”, but Javascript has a unified arithmetic type.)
Update: Mladen Jablanović suggests a cast, and yes, if both m and n are Fixnum, it’s needed. In Ruby 1 / 3 is 0 but in JS it’s 0.333… Here is a refined suggestion: