Function std.algorithm.mutation.strip

The stripLeft function will strip the front of the range, the stripRight function will strip the back of the range, while the strip function will strip both the front and back of the range.

Note that the strip and stripRight functions require the range to be a BidirectionalRange range.

All of these functions come in two varieties: one takes a target element, where the range will be stripped as long as this element can be found. The other takes a lambda predicate, where the range will be stripped as long as the predicate returns true.

Prototypes

Range strip(Range, E)(
  Range range,
  E element
)
if (isBidirectionalRange!Range && is(typeof(range.front == element) : bool));

Range strip(alias pred, Range)(
  Range range
)
if (isBidirectionalRange!Range && is(typeof(pred(range.back)) : bool));

Example

Strip leading and trailing elements equal to the target element.

assert("  foobar  ".strip(' ') == "foobar");
assert("00223.444500".strip('0') == "223.4445");
assert("ëëêéüŗōpéêëë".strip('ë') == "êéüŗōpéê");
assert([1, 1, 0, 1, 1].strip(1) == [0]);
assert([0.0, 0.01, 0.01, 0.0].strip(0).length == 2);

Example

Strip leading and trailing elements while the predicate returns true.

assert("  foobar  ".strip!(a => a == ' ')() == "foobar");
assert("00223.444500".strip!(a => a == '0')() == "223.4445");
assert("ëëêéüŗōpéêëë".strip!(a => a == 'ë')() == "êéüŗōpéê");
assert([1, 1, 0, 1, 1].strip!(a => a == 1)() == [0]);
assert([0.0, 0.01, 0.5, 0.6, 0.01, 0.0].strip!(a => a < 0.4)().length == 2);

Example

Strip leading elements equal to the target element.

assert("  foobar  ".stripLeft(' ') == "foobar  ");
assert("00223.444500".stripLeft('0') == "223.444500");
assert("ůůűniçodêéé".stripLeft('ů') == "űniçodêéé");
assert([1, 1, 0, 1, 1].stripLeft(1) == [0, 1, 1]);
assert([0.0, 0.01, 0.01, 0.0].stripLeft(0).length == 3);

Example

Strip leading elements while the predicate returns true.

assert("  foobar  ".stripLeft!(a => a == ' ')() == "foobar  ");
assert("00223.444500".stripLeft!(a => a == '0')() == "223.444500");
assert("ůůűniçodêéé".stripLeft!(a => a == 'ů')() == "űniçodêéé");
assert([1, 1, 0, 1, 1].stripLeft!(a => a == 1)() == [0, 1, 1]);
assert([0.0, 0.01, 0.10, 0.5, 0.6].stripLeft!(a => a < 0.4)().length == 2);

Example

Strip trailing elements equal to the target element.

assert("  foobar  ".stripRight(' ') == "  foobar");
assert("00223.444500".stripRight('0') == "00223.4445");
assert("ùniçodêéé".stripRight('é') == "ùniçodê");
assert([1, 1, 0, 1, 1].stripRight(1) == [1, 1, 0]);
assert([0.0, 0.01, 0.01, 0.0].stripRight(0).length == 3);

Example

Strip trailing elements while the predicate returns true.

assert("  foobar  ".stripRight!(a => a == ' ')() == "  foobar");
assert("00223.444500".stripRight!(a => a == '0')() == "00223.4445");
assert("ùniçodêéé".stripRight!(a => a == 'é')() == "ùniçodê");
assert([1, 1, 0, 1, 1].stripRight!(a => a == 1)() == [1, 1, 0]);
assert([0.0, 0.01, 0.10, 0.5, 0.6].stripRight!(a => a > 0.4)().length == 3);