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Function `std.range.stride`

Iterates range r with stride n. If the range is a random-access range, moves by indexing into the range; otherwise, moves by successive calls to popFront. Applying stride twice to the same range results in a stride with a step that is the product of the two applications. It is an error for n to be 0.


						
				auto auto stride(Range)
				(
				

				  Range r,
				

				  size_t n
				

				)
				

				if (isInputRange!(Unqual!Range));

Parameters

Name	Description
r	the input range to stride over
n	the number of elements to skip over

Returns

At minimum, an input range. The resulting range will adopt the range primitives of the underlying range as long as hasLength is true.

Example

import std.algorithm.comparison : equal;

int[] a = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ];
assert(equal(stride(a, 3), [ 1, 4, 7, 10 ][]));
writeln(stride(stride(a, 2), 3)); // stride(a, 6)

Authors

Andrei Alexandrescu, David Simcha, Jonathan M Davis, and Jack Stouffer. Credit for some of the ideas in building this module goes to Leonardo Maffi.

License

Boost License 1.0.