// TreeSetExample to demonstrate basic usage of TreeSet
func TreeSetExample() {
set := treeset.NewWithIntComparator() // empty
set.Add(1) // 1
set.Add(2, 2, 3, 4, 5) // 1, 2, 3, 4, 5 (in order, duplicates ignored)
set.Remove(4) // 1, 2, 3, 5 (in order)
set.Remove(2, 3) // 1, 5 (in order)
set.Contains(1) // true
set.Contains(1, 5) // true
set.Contains(1, 6) // false
_ = set.Values() // []int{1,5} (in order)
set.Clear() // empty
set.Empty() // true
set.Size() // 0
}
func EnumerableWithIndexTest() {
set := treeset.NewWithIntComparator()
set.Add(2, 3, 4, 2, 5, 6, 7, 8)
printSet("Initial", set) // [ 2 3 4 5 6 7 8 ]
even := set.Select(func(index int, value interface{}) bool {
return value.(int)%2 == 0
})
printSet("Even numbers", even) // [ 2 4 6 8 ]
foundIndex, foundValue := set.Find(func(index int, value interface{}) bool {
return value.(int)%2 == 0 && value.(int)%3 == 0
})
if foundIndex != -1 {
fmt.Println("Number divisible by 2 and 3 found is", foundValue, "at index", foundIndex) // value: 6, index: 4
}
square := set.Map(func(index int, value interface{}) interface{} {
return value.(int) * value.(int)
})
printSet("Numbers squared", square) // [ 4 9 16 25 36 49 64 ]
bigger := set.Any(func(index int, value interface{}) bool {
return value.(int) > 5
})
fmt.Println("Set contains a number bigger than 5 is ", bigger) // true
positive := set.All(func(index int, value interface{}) bool {
return value.(int) > 0
})
fmt.Println("All numbers are positive is", positive) // true
evenNumbersSquared := set.Select(func(index int, value interface{}) bool {
return value.(int)%2 == 0
}).Map(func(index int, value interface{}) interface{} {
return value.(int) * value.(int)
})
printSet("Chaining", evenNumbersSquared) // [ 4 16 36 64 ]
}