[Issue 4405] all function - returns whether predicate is true for all elements in a range

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4405


bearophile_hugs at eml.cc changed:

           What    |Removed                     |Added
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                 CC|                            |bearophile_hugs at eml.cc


--- Comment #5 from bearophile_hugs at eml.cc 2011-02-07 15:08:28 PST ---
I have written a duplicated enhancement request: bug 5544

There I have asked an all() and any() that allow to write code as this:

import std.algorithm;
void main() {
    auto items = [1, 7, 22];
    bool r1 = all!q{a % 2}(items);
    assert(!r1);
    items = [1, 7, 21];
    bool r2 = all!q{a % 2}(items);
    assert(r2);
}

Instead of:

import std.algorithm;
void main() {
    auto items = [1, 7, 22];
    bool r1 = reduce!q{a && b}(true, map!q{a % 2}(items));
    assert(!r1);
    items = [1, 7, 21];
    bool r2 = reduce!q{a && b}(true, map!q{a % 2}(items));
    assert(r2);
}

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