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Function `std.algorithm.comparison.isSameLength`

Checks if the two ranges have the same number of elements. This function is optimized to always take advantage of the length member of either range if it exists.


						
				bool isSameLength(Range1, Range2)
				(
				

				  Range1 r1,
				

				  Range2 r2
				

				)
				

				if (isInputRange!Range1 && isInputRange!Range2);

If both ranges have a length member, this function is Ο(1). Otherwise, this function is Ο(min(r1.length, r2.length)).

Infinite ranges are considered of the same length. An infinite range has never the same length as a finite range.

Parameters

Name	Description
r1	a finite input range
r2	a finite input range

Returns

true if both ranges have the same length, false otherwise.

Example

assert(isSameLength([1, 2, 3], [4, 5, 6]));
assert(isSameLength([0.3, 90.4, 23.7, 119.2], [42.6, 23.6, 95.5, 6.3]));
assert(isSameLength("abc", "xyz"));

int[] a;
int[] b;
assert(isSameLength(a, b));

assert(!isSameLength([1, 2, 3], [4, 5]));
assert(!isSameLength([0.3, 90.4, 23.7], [42.6, 23.6, 95.5, 6.3]));
assert(!isSameLength("abcd", "xyz"));

Authors

Andrei Alexandrescu

License

Boost License 1.0.