Factors of an integer: Difference between revisions
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(Faster implementation in scala) |
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=={{header|Scala}}== |
=={{header|Scala}}== |
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<lang Scala> |
<lang Scala> |
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Brute force approach: |
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def factors(num: Int) = { |
def factors(num: Int) = { |
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(1 to num).filter { divisor => |
(1 to num).filter { divisor => |
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num % divisor == 0 |
num % divisor == 0 |
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} |
} |
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| ⚫ | |||
Since factors can't be higher than sqrt(num), the code above can be edited as follows |
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def factors(num: Int) = { |
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(1 to sqrt(num)).filter { divisor => |
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num % divisor == 0 |
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} |
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| ⚫ | |||
=={{header|Scheme}}== |
=={{header|Scheme}}== |
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