• d-bugmail puremagic.com (24/24) Apr 11 2014 https://issues.dlang.org/show_bug.cgi?id=12562

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=12562

          Issue ID: 12562
           Summary: std.algorithm.mul
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody puremagic.com
          Reporter: bearophile_hugs eml.cc

I suggest to add a function "mul" similar to std.algorithm.sum to std.algorithm
that computes the product of the given range:

void main() {
    import std.stdio, std.range, std.algorithm, std.bigint;
    reduce!((a, b) => a * b)(1, iota(1, 10)).writeln; // 362_880
    iota(1, 10).mul.writeln; // The same result.
    iota(1, 10).mul(1.0).writeln; // The same result, but of type double.
    BigInt[] a;
    a.mul.writeln; // Should print 1
}

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