Returns a Boolean value indicating whether the sequence precedes another sequence in a lexicographical (dictionary) ordering, using the less-than operator (<) to compare elements.
SDK
- Xcode 9.0+
Framework
- Swift Standard Library
Declaration
Available when Element conforms to Comparable.
Parameters
otherA sequence to compare to this sequence.
Return Value
true if this sequence precedes other in a dictionary ordering; otherwise, false.
Discussion
This example uses the lexicographically method to test which array of integers comes first in a lexicographical ordering.
let a = [1, 2, 2, 2]
let b = [1, 2, 3, 4]
print(a.lexicographicallyPrecedes(b))
// Prints "true"
print(b.lexicographicallyPrecedes(b))
// Prints "false"
Complexity: O(m), where m is the lesser of the length of the sequence and the length of other.