Sieve of Eratosthenes: Difference between revisions
Content deleted Content added
Changed Float80 to Double to increases compatibility with Apple Silicon |
Emacs Lisp: Use cl-lib |
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=={{header|Emacs Lisp}}== |
=={{header|Emacs Lisp}}== |
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{{libheader|cl-lib}} |
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<lang lisp> |
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(defun sieve-set (limit) |
<lang lisp>(defun sieve-set (limit) |
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(let ((xs (make-vector (1+ limit) 0))) |
(let ((xs (make-vector (1+ limit) 0))) |
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(loop for i from 2 to limit |
(cl-loop for i from 2 to limit |
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when (zerop (aref xs i)) |
when (zerop (aref xs i)) |
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collect i |
collect i |
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and do (loop for m from (* i i) to limit by i |
and do (cl-loop for m from (* i i) to limit by i |
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do (aset xs m 1))))) |
do (aset xs m 1)))))</lang> |
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</lang> |
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Straightforward implementation of [http://en.wikipedia.org/wiki/Sieve_of_Eratosthenes#Implementation sieve of Eratosthenes], 2 times faster: |
Straightforward implementation of [http://en.wikipedia.org/wiki/Sieve_of_Eratosthenes#Implementation sieve of Eratosthenes], 2 times faster: |
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<lang lisp> |
<lang lisp>(defun sieve (limit) |
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(defun sieve (limit) |
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(let ((xs (vconcat [0 0] (number-sequence 2 limit)))) |
(let ((xs (vconcat [0 0] (number-sequence 2 limit)))) |
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(loop for i from 2 to (sqrt limit) |
(cl-loop for i from 2 to (sqrt limit) |
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when (aref xs i) |
when (aref xs i) |
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do (loop for m from (* i i) to limit by i |
do (cl-loop for m from (* i i) to limit by i |
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do (aset xs m 0))) |
do (aset xs m 0))) |
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(remove 0 xs))) |
(remove 0 xs)))</lang> |
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</lang> |
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=={{header|Erlang}}== |
=={{header|Erlang}}== |
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