scala bitset_Scala中的BitSet

scala bitset

Scala BitSet (Scala BitSet)

Set is a collection of unique elements.

集合是唯一元素的集合。

Bitset is a set of positive integers represented as a 64-bit word.

位集是一组表示为64位字的正整数。

Syntax:

句法：

    var bitset : Bitset = Bitset(elements...)

In the Scala programming language, BitSet can be mutable as well as immutable.

在Scala编程语言中， BitSet可以是可变的而且是不变的。

In mutable BitSet, bits can be changed in the program. Using scala.collection.mutable.BitSet

在可变的BitSet中 ，可以在程序中更改位。使用scala.collection.mutable.BitSet

In immutable BitSet, bits cannot be changed in the program. Using scala.collection.immutable.BitSet

在不可变的BitSet中 ，不能在程序中更改位。使用scala.collection.immutable.BitSet

Example 1: Creation of a new BitSet

示例1：创建一个新的BitSet

import scala.collection.immutable.BitSet
object MyClass {
def main(args: Array[String]) {
val bitSet: BitSet = BitSet(0, 1, 2, 3) 
println("Elements of new BitSet are " + bitSet) 
}
}

Output

输出量

Elements of new BitSet are BitSet(0, 1, 2, 3)

Example 2: Search for an element in BitSet

示例2：在BitSet中搜索元素

Search operation on BitSet in Scala is quite easy and passing the elements to be searched in BitSet, and it will return true or false based on the search.

在Scala中对BitSet进行搜索操作非常容易，并且可以在BitSet中传递要搜索的元素，并且根据搜索结果将返回true或false。

import scala.collection.immutable.BitSet
object MyClass {
def main(args: Array[String]) {
val bitSet: BitSet = BitSet(0, 13, 25, 39, 50) 
println("Elements of new BitSet are " + bitSet) 
println("Element 25 is in the BitSet? " + bitSet(25))
println("Element 34 is in the BitSet? " + bitSet(34))
}
}

Output

输出量

Elements of new BitSet are BitSet(0, 13, 25, 39, 50)
Element 25 is in the BitSet? true
Element 34 is in the BitSet? false

Example 3: Adding elements to the BitSet

示例3：将元素添加到BitSet

You can add one or multiple elements in a BitSet in Scala. The operators + and ++ are used to add single and multiple elements in BitSet in Scala. The operation will require new BitSet to hold the updated BitSet.

您可以在Scala的BitSet中添加一个或多个元素。运算符+和++用于在Scala的BitSet中添加单个和多个元素。该操作将需要新的BitSet来保存更新的BitSet。

import scala.collection.immutable.BitSet
object MyClass {
def main(args: Array[String]) {
val bitSet: BitSet = BitSet(0, 13, 25, 39, 50) 
println("Elements of new BitSet are " + bitSet) 
println("Adding new elements to BitSet : ")
val bitSet2 : BitSet = bitSet + 45 
println("Elements of new BitSet are " + bitSet2) 
println("Adding new elements to BitSet : ")
val bitSet3 : BitSet = bitSet2 ++  BitSet(34 , 54)
println("Elements of new BitSet are " + bitSet3) 
}
}

Output

输出量

Elements of new BitSet are BitSet(0, 13, 25, 39, 50)
Adding new elements to BitSet : 
Elements of new BitSet are BitSet(0, 13, 25, 39, 45, 50)
Adding new elements to BitSet : 
Elements of new BitSet are BitSet(0, 13, 25, 34, 39, 45, 50, 54)

Example 4: Deleting Elements from BitSet in Scala

示例4：从Scala的BitSet中删除元素

You can delete elements from BitSet in Scala. The operator - is used to delete an element from BitSet. The operations will require new BitSet to hold the updated BitSet.

您可以从Scala的BitSet中删除元素。运算符-用于从BitSet中删除元素。该操作将需要新的BitSet来保存更新的BitSet。

import scala.collection.immutable.BitSet
object MyClass {
def main(args: Array[String]) {
val bitSet: BitSet = BitSet(0, 13, 25, 39, 50) 
println("Elements of new BitSet are " + bitSet) 
println("Deleting element from BitSet : ")
val bitSet2 : BitSet = bitSet - 25 
println("Elements of new BitSet are " + bitSet2)
}
}

Output

输出量

Elements of new BitSet are BitSet(0, 13, 25, 39, 50)
Deleting element from BitSet : 
Elements of new BitSet are BitSet(0, 13, 39, 50)

Example 5: Creating Empty BitSet in Scala

示例5：在Scala中创建空的BitSet

An empty set can also be created in Scala. The empty keyword is used to create an empty BitSet in Scala.

也可以在Scala中创建一个空集。 empty关键字用于在Scala中创建一个空的BitSet。

import scala.collection.immutable.BitSet
object MyClass {
def main(args: Array[String]) {
val bitSet: BitSet = BitSet.empty
println("Elements of new BitSet are " + bitSet) 
}
}

Output

输出量