protocol Strideable
Inheritance 
Comparable, Equatable
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Associated Types 
Stride : SignedNumberType
A type that can represent the distance between two values of 
Import  import Swift 
Instance Methods
A strict total order
over instances of Self
.
Declaration
func <(lhs: Self, rhs: Self) > Bool
Declared In
Comparable
Returns true
if lhs
is equal to rhs
.
Equality implies substitutability. When x == y
, x
and
y
are interchangeable in any code that only depends on their
values.
Class instance identity as distinguished by tripleequals ===
is notably not part of an instance's value. Exposing other
nonvalue aspects of Equatable
types is discouraged, and any
that are exposed should be explicitly pointed out in
documentation.
Equality is an equivalence relation
x == x
istrue
x == y
impliesy == x
x == y
andy == z
impliesx == z
Inequality is the inverse of equality, i.e. !(x == y)
iff
x != y
.
Declaration
func ==(lhs: Self, rhs: Self) > Bool
Declared In
Equatable
Returns a Self
x
such that self.distanceTo(x)
approximates
n
.
Complexity: O(1).
See Also: RandomAccessIndexType
's advancedBy
, which
provides a stronger semantic guarantee.
Declaration
func advancedBy(n: Self.Stride) > Self
Returns a stride x
such that self.advancedBy(x)
approximates
other
.
Complexity: O(1).
See Also: RandomAccessIndexType
's distanceTo
, which provides a
stronger semantic guarantee.
Declaration
func distanceTo(other: Self) > Self.Stride
Default Implementations
Returns the sequence of values (self
, self + stride
, self +
stride + stride
, ... last) where last is the last value in
the progression less than or equal to end
.
Note: There is no guarantee that end
is an element of the sequence.
Declaration
func stride(through end: Self, by stride: Self.Stride) > StrideThrough<Self>
Returns the sequence of values (self
, self + stride
, self +
stride + stride
, ... last) where last is the last value in
the progression that is less than end
.
Declaration
func stride(to end: Self, by stride: Self.Stride) > StrideTo<Self>
Conforming types are notionally continuous, onedimensional values that can be offset and measured.