random-access range to cover
Range whose elements consist of the elements of r, in random order. Will be a forward range if both r and rng are forward ranges, an input range otherwise.
import std.algorithm.comparison : equal; import std.range : iota; auto rnd = MinstdRand0(42); version (D_LP64) // https://issues.dlang.org/show_bug.cgi?id=15147 assert(10.iota.randomCover(rnd).equal([7, 4, 2, 0, 1, 6, 8, 3, 9, 5]));
Covers a given range r in a random manner, i.e. goes through each element of r once and only once, just in a random order. r must be a random-access range with length.
If no random number generator is passed to randomCover, the thread-global RNG rndGen will be used internally.