Multiple range enumeration

puming via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Tue Nov 10 18:57:19 PST 2015


On Wednesday, 11 November 2015 at 02:55:25 UTC, cym13 wrote:
> On Wednesday, 11 November 2015 at 02:38:19 UTC, puming wrote:
>> Hi,
>>
>> If I have multiple ranges, say:
>>
>> auto a = [1, 2, 3];
>> auto b = ["a", "b", "c"];
>> auto c = ["x", "y", "z"];
>>
>> I'd like a composition range that enumerate all combinations 
>> of these ranges,
>> having the same effect as a nested foreach loop:
>>
>> foreach (i; a) {
>>   foreach (j; b) {
>>     foreach (k; c) {
>>        writlen(i, j, k);
>>     }
>>   }
>> }
>>
>> Is there such a generic function in std lib?
>
> http://dlang.org/phobos/std_algorithm_setops.html#.cartesianProduct ?

Thanks :-)



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