Michael Wijaya

1,262 reputation

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bio	website	holdfirst.wordpress.com
	location	United States
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visits	member for	1 year, 3 months
	seen	May 17 at 19:29
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	1,262 reputation	bio	website	holdfirst.wordpress.com	visits	member for	1 year, 3 months
420 badges		location	United States		seen	May 17 at 19:29

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Jun 17	comment	Implementing a function which generalizes the merging step in merge sort The difference in performance is astounding: 0.12s vs 1.23s for lists of lengths 10000 and 1.13s vs 146.60s for lists of length 100000. I find it reassuring that even without making significant changes to the straightforward recursion, I can get major performance boost by switching to linked lists. Perhaps reading The Little Schemer did not cause too much harm.
Jun 17	revised	Implementing a function which generalizes the merging step in merge sort Added sample output
Jun 17	comment	Implementing a function which generalizes the merging step in merge sort @Rojo Thanks for pointing out the ambiguity. I edited the question.
Jun 17	revised	Implementing a function which generalizes the merging step in merge sort Added clarification in response to question by Rojo
Jun 17	comment	Implementing a function which generalizes the merging step in merge sort @Rojo For `MergeList`, the two lists need not be sorted. For example, `MergeList[{2, 5, 1}, {3, 4}, LessEqual]` evaluates to `{2, 3, 4, 5, 1}`.
Jun 17	asked	Implementing a function which generalizes the merging step in merge sort
Jun 16	awarded	Autobiographer
Jun 15	comment	How to substitute numeric values in a symbolic Jacobian matrix? +1 for explaining what went wrong in M.J.'s code and the use of `ArrayRules` + `ArrayPlot`.
Jun 15	revised	How to substitute numeric values in a symbolic Jacobian matrix? deleted 395 characters in body
Jun 15	revised	How to substitute numeric values in a symbolic Jacobian matrix? Updated following M.J.'s comments
Jun 14	comment	How to substitute numeric values in a symbolic Jacobian matrix? @J.M. I did not know that variables for `D` need not be a symbol. This is good to know.
Jun 14	revised	How to substitute numeric values in a symbolic Jacobian matrix? I forgot to define `variableVector`
Jun 14	revised	How to substitute numeric values in a symbolic Jacobian matrix? added 192 characters in body
Jun 14	revised	How to substitute numeric values in a symbolic Jacobian matrix? Stylistic changes, added method to generate vector of variables symbolically
Jun 14	answered	How to substitute numeric values in a symbolic Jacobian matrix?
Jun 14	awarded	Civic Duty
Jun 13	comment	Interprocedural optimization It is possible to compute `PrimePi[n]` without enumerating all prime numbers less than $n$. See for example Lehmer's recursive formula.
Jun 13	revised	How do you check if there are any equal arguments(even sublist) in a list? Changed the name of the second function since it is no longer a Boolean function.
Jun 13	revised	How do you check if there are any equal arguments(even sublist) in a list? Include modifiication to keep track of repeated elements as per OP's request
Jun 13	answered	How do you check if there are any equal arguments(even sublist) in a list?