Detailed introduction to Set collection

This article mainly introduces the relevant information about the traversal of Java Set collections and the comparison of implementation classes. Friends in need can refer to the traversal of Java Set collections and the comparison of implementation classes. The Set collection in Java is a collection that does not contain repeated elements. Collection, first let’s look at the traversal method package com.sort; ​ import java.util.HashSet; import java.util.Iterator; import java.util.Set; ​ /** * A collection that does not contain duplicate elements. More precisely, set does not contain an element pair e1 and e2 that satisfies e1.equals(e2), &nb

1. Traversal of Java Set collections and comparison of implementation classes (with code)

Introduction: This article mainly introduces the relevant information about Java Set collection traversal and comparison of implementation classes. Friends in need can refer to

2 . Example code for merging dictionary key values ​​and removing duplicate elements using Python

Introduction: Hypothesis There is a dictionary in python as follows: x={'a':'1,2,3', 'b':'2,3,4'} needs to be merged into: x={'c':'1,2, 3,4'} needs to do three things: 1. Convert the string into a numeric list 2. Merge the two lists and add new key values ​​3. Remove duplicate elements The first step is through the commonly used function eval() Done, step 2 needs to add a key value and add elements, step 3 uses the properties of the set collection

3. Detailed introduction to the python-set collection class method

Introduction: This article explains in detail the python-set collection class method

4. Detailed explanation of Collection in Java

##Introduction: Java Sets are toolkits provided by Java, including commonly used data structures: sets, linked lists, queues, stacks, arrays, mappings, etc. The location of the Java collection toolkit is java.util.*Java collections can be mainly divided into four parts: List, Set, Map, and tool classes (Iterator, Enumeration, Arrays, and Collections). The Java collection framework is as shown below: From the above picture, you can see that the Java framework is mainly C

5. Sample code of TreeSet for Java collections

Introduction: TreeSet is an ordered collection, and its function is to provide an ordered Set collection. It inherits the AbstractSet abstract class and implements the NavigableSet, Cloneable, and Serializable interfaces. TreeSet is implemented based on TreeMap. The elements of TreeSet support two sorting methods: natural sorting or sorting according to the provided Comparator. TreeSet's interface dependency diagram: As can be seen from the diagram: (1) T

6. Detailed code examples for removing duplicate method sets from Java arrays

Introduction: Often used, sometimes not just simple basic types, which can be duplicated using set collections, there are many Time uses our custom type. Here is an example (I am taking int as an example here): Method 1. This is similar to the selection sort algorithm. First we take the value of i, and then all repeated values ​​after i Remove. The specific implementation is as follows: [java] view plain copy import java.util.List; imp

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Common Python knowledge points

#Introduction: This article mainly introduces a summary of common knowledge points in Python, including Set collections, functions, deep copying, shallow copying, required Friends can refer to

8. Python set (set) type operations and intersection

Introduction: The editor below will bring you a brief discussion of Python set (set) type operations - and cross-examination. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

9. How to loop through and delete elements in List and Set collections in java (recommended)

#Introduction: The following editor will bring you an article on how to loop through and delete elements in List and Set collections in Java (recommended). The editor thinks it’s pretty good, so I’ll share it with you and give it as a reference. Let’s follow the editor and take a look.

10. How to loop through and delete elements in List and Set collections in java

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