Isqrt (integer square root) of X: Difference between revisions
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(→{{header|Haskell}}: added solution) |
(→{{header|Ruby}}: Use refinement instead of global monkey-patching of Integer class) |
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=={{header|Ruby}}== |
=={{header|Ruby}}== |
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Ruby already has [https://ruby-doc.org/core-2.7.0/Integer.html#method-c-sqrt Integer.sqrt], which results in the integer square root of a positive integer. It can be re-implemented as follows: |
Ruby already has [https://ruby-doc.org/core-2.7.0/Integer.html#method-c-sqrt Integer.sqrt], which results in the integer square root of a positive integer. It can be re-implemented as follows: |
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<lang ruby> |
<lang ruby>module Commatize |
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refine Integer do |
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def commatize |
def commatize |
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self.to_s.gsub( /(\d)(?=\d{3}+(?:\.|$))(\d{3}\..*)?/, "\\1,\\2") |
self.to_s.gsub( /(\d)(?=\d{3}+(?:\.|$))(\d{3}\..*)?/, "\\1,\\2") |
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end |
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end |
end |
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end |
end |
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using Commatize |
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def isqrt(x) |
def isqrt(x) |
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q, r = 1, 0 |
q, r = 1, 0 |
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