(*Pattern matching*)
AbsoluteTiming@ReplaceList[Range[100],
{___,a_,___,b_,___,c_,___}:>{a,b,c}/;a+b+c==50]
(*Select*)
AbsoluteTiming@Select[Subsets[Range[100],{3}],Total@#==50&]
"Patten matching is always faster than "Select".
Mathematica 教學 Pure functions and Select[] sequential elements of List
由 戴忠淵 於 2011年6月22日星期三
下午4:55 發表
"Patten matching is always faster than "Select".
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