[Issue 4725] std.algorithm.sum()

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4725



--- Comment #1 from bearophile_hugs at eml.cc 2010-10-11 13:33:52 PDT ---
One test case for sum():


import std.algorithm: sum;
void main() {
    bool[] array = [true, false, true, true];
    assert(sum(array) == 3);
}



Currently this doesn't compile:
reduce!q{a + b}(array)

You need to add a 0 start:
reduce!q{a + b}(0, array)

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