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Function std.range.dropBack

Convenience function which calls range.popFrontN(n) and returns range. drop makes it easier to pop elements from a range and then pass it to another function within a single expression, whereas popFrontN would require multiple statements.

dropBack provides the same functionality but instead calls range.popBackN(n).

Prototype

R dropBack(R)(
  R range,
  size_t n
)
if (isBidirectionalRange!R);

Note

drop and dropBack will only pop up to n elements but will stop if the range is empty first.

Example

import std.algorithm : equal;

assert([0, 2, 1, 5, 0, 3].drop(3) == [5, 0, 3]);
assert("hello world".drop(6) == "world");
assert("hello world".drop(50).empty);
assert("hello world".take(6).drop(3).equal("lo "));

Authors

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

License

Boost License 1.0.

Comments