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Module std.algorithm.mutation
This is a submodule of std
.
It contains generic mutation algorithms.
Function Name | Description |
---|---|
bringToFront | If a = [1, 2, 3] and b = [4, 5, 6, 7] ,
bringToFront(a, b) leaves a = [4, 5, 6] and
b = [7, 1, 2, 3] . |
copy | Copies a range to another. If
a = [1, 2, 3] and b = new int[5] , then copy(a, b)
leaves b = [1, 2, 3, 0, 0] and returns b[3 .. $] . |
fill | Fills a range with a pattern,
e.g., if a = new int[3] , then fill(a, 4)
leaves a = [4, 4, 4] and fill(a, [3, 4]) leaves
a = [3, 4, 3] . |
initializeAll | If a = [1.2, 3.4] , then initializeAll(a) leaves
a = [double . |
move | move(a, b) moves a into b . move(a) reads a
destructively when necessary. |
moveEmplace | Similar to move but assumes target is uninitialized. |
moveAll | Moves all elements from one range to another. |
moveEmplaceAll | Similar to moveAll but assumes all elements in target are uninitialized. |
moveSome | Moves as many elements as possible from one range to another. |
moveEmplaceSome | Similar to moveSome but assumes all elements in target are uninitialized. |
remove | Removes elements from a range in-place, and returns the shortened range. |
reverse | If a = [1, 2, 3] , reverse(a) changes it to [3, 2, 1] . |
strip | Strips all leading and trailing elements equal to a value, or that
satisfy a predicate.
If a = [1, 1, 0, 1, 1] , then strip(a, 1) and
strip!(e => e == 1)(a) returns [0] . |
stripLeft | Strips all leading elements equal to a value, or that satisfy a
predicate. If a = [1, 1, 0, 1, 1] , then stripLeft(a, 1) and
stripLeft!(e => e == 1)(a) returns [0, 1, 1] . |
stripRight | Strips all trailing elements equal to a value, or that satisfy a
predicate.
If a = [1, 1, 0, 1, 1] , then stripRight(a, 1) and
stripRight!(e => e == 1)(a) returns [1, 1, 0] . |
swap | Swaps two values. |
swapAt | Swaps two values by indices. |
swapRanges | Swaps all elements of two ranges. |
uninitializedFill | Fills a range (assumed uninitialized) with a value. |
Functions
Name | Description |
---|---|
bringToFront(front, back)
|
bringToFront takes two ranges front and back , which may
be of different types. Considering the concatenation of front and
back one unified range, bringToFront rotates that unified
range such that all elements in back are brought to the beginning
of the unified range. The relative ordering of elements in front
and back , respectively, remains unchanged.
|
copy(source, target)
|
Copies the content of source into target and returns the
remaining (unfilled) part of target .
|
fill(range, value)
|
Assigns value to each element of input range range .
|
initializeAll(range)
|
Initializes all elements of range with their value.
Assumes that the elements of the range are uninitialized.
|
move(source, target)
|
Moves source into target , via a destructive copy when necessary.
|
moveAll(src, tgt)
|
Calls move(a, b) for each element a in src and the corresponding
element b in tgt , in increasing order.
|
moveEmplace(source, target)
|
Similar to move but assumes target is uninitialized. This
is more efficient because source can be blitted over target
without destroying or initializing it first.
|
moveEmplaceAll(src, tgt)
|
Similar to moveAll but assumes all elements in tgt are
uninitialized. Uses moveEmplace to move elements from
src over elements from tgt .
|
moveEmplaceSome(src, tgt)
|
Same as moveSome but assumes all elements in tgt are
uninitialized. Uses moveEmplace to move elements from
src over elements from tgt .
|
moveSome(src, tgt)
|
Calls move(a, b) for each element a in src and the corresponding
element b in tgt , in increasing order, stopping when either range has been
exhausted.
|
remove(range, offset)
|
Eliminates elements at given offsets from range and returns the shortened
range.
|
remove(range)
|
Reduces the length of the
bidirectional range range by removing
elements that satisfy pred . If s = SwapStrategy ,
elements are moved from the right end of the range over the elements
to eliminate. If s = SwapStrategy (the default),
elements are moved progressively to front such that their relative
order is preserved. Returns the filtered range.
|
reverse(r)
|
Reverses r in-place. Performs r evaluations of swap .
UTF sequences consisting of multiple code units are preserved properly.
|
strip(range, element)
|
The strip group of functions allow stripping of either leading, trailing, or both leading and trailing elements. |
stripLeft(range, element)
|
The strip group of functions allow stripping of either leading, trailing, or both leading and trailing elements. |
stripRight(range, element)
|
The strip group of functions allow stripping of either leading, trailing, or both leading and trailing elements. |
swap(lhs, rhs)
|
Swaps lhs and rhs . The instances lhs and rhs are moved in
memory, without ever calling opAssign , nor any other function. T
need not be assignable at all to be swapped.
|
swapAt(r, i1, i2)
|
Swaps two elements in-place of a range r ,
specified by their indices i1 and i2 .
|
swapRanges(r1, r2)
|
Swaps all elements of r1 with successive elements in r2 .
Returns a tuple containing the remainder portions of r1 and r2 that were not swapped (one of them will be empty). The ranges may
be of different types but must have the same element type and support
swapping.
|
uninitializedFill(range, value)
|
Initializes each element of range with value .
Assumes that the elements of the range are uninitialized.
This is of interest for structs that
define copy constructors (for all other types, fill and
uninitializedFill are equivalent).
|
Enums
Name | Description |
---|---|
SwapStrategy
|
Defines the swapping strategy for algorithms that need to swap
elements in a range (such as partition and sort). The strategy
concerns the swapping of elements that are not the core concern of the
algorithm. For example, consider an algorithm that sorts [ "abc",
"b", "aBc" ] according to toUpper(a) < toUpper(b) . That
algorithm might choose to swap the two equivalent strings "abc"
and "aBc" . That does not affect the sorting since both
["abc", "aBc", "b" ] and [ "aBc", "abc", "b" ] are valid
outcomes.
|
Authors
License
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