Home Backend Development Golang How to implement slice deletion operation in golang

How to implement slice deletion operation in golang

Apr 06, 2023 am 09:12 AM

Slice is a common data structure in Go language. It can be regarded as an abstraction of array. Slices have more flexible operations than arrays, one of which is deleting elements. This article will introduce how to implement slice deletion operation in golang.

  1. Introduction

In golang, slice is a dynamic array, which has strong scalability and flexibility and is one of the commonly used data structures in golang. . Slices can add elements at the end through the append() function, but golang does not provide a method to directly delete an element in the slice, so other methods need to be used.

  1. How to implement slicing to delete elements

2.1 Moving slicing elements

One way to slice and delete elements is to move the elements after the elements that need to be deleted The whole moves forward, covering the deleted elements. We can achieve the purpose of deleting elements by moving the elements behind the element that needs to be deleted forward one by one through a loop.

The following is a sample code for deletion by moving slice elements:

func remove(slice []int, elem int) []int {
    for i := 0; i < len(slice); i++ {
        if slice[i] == elem {
            copy(slice[i:], slice[i+1:])
            slice = slice[:len(slice)-1]
        }
    }
    return slice
}
Copy after login

In the above code, we first traverse the entire slice, find the elements that need to be deleted through the if statement, and use copy() The function moves the elements after the element that needs to be deleted as a whole forward, and finally reduces the length of the slice by 1 through the slice copy operation, thereby realizing the deletion of the slice elements.

2.2 Slice element exchange

Slice element exchange is also a way to achieve slice deletion. Different from slice element movement, it will exchange the position of the element to be deleted with the last element. Then reduce the slice length by 1 to avoid the time or space loss that may be caused by element movement. The following is a sample code:

func remove(slice []int, elem int) []int {
    for i := 0; i < len(slice); i++ {
        if slice[i] == elem {
            slice[i] = slice[len(slice)-1]
            slice = slice[:len(slice)-1]
        }
    }
    return slice
}
Copy after login

In the above code, we also traverse the entire slice, find the element that needs to be deleted through the if statement, exchange the position of the element that needs to be deleted with the last element, and then reduce the length of the slice by 1 , realizes the deletion of slice elements.

  1. Summary

Slicing is a common data structure in Golang and has high scalability and flexibility. In golang, slicing does not provide a method to directly delete an element, so other methods need to be used. This article introduces two implementation methods: slice element movement and slice element exchange. Readers can choose the appropriate method to implement slice deletion based on their specific needs.

The above is the detailed content of How to implement slice deletion operation in golang. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Go language pack import: What is the difference between underscore and without underscore? Go language pack import: What is the difference between underscore and without underscore? Mar 03, 2025 pm 05:17 PM

This article explains Go's package import mechanisms: named imports (e.g., import &quot;fmt&quot;) and blank imports (e.g., import _ &quot;fmt&quot;). Named imports make package contents accessible, while blank imports only execute t

How to implement short-term information transfer between pages in the Beego framework? How to implement short-term information transfer between pages in the Beego framework? Mar 03, 2025 pm 05:22 PM

This article explains Beego's NewFlash() function for inter-page data transfer in web applications. It focuses on using NewFlash() to display temporary messages (success, error, warning) between controllers, leveraging the session mechanism. Limita

How to convert MySQL query result List into a custom structure slice in Go language? How to convert MySQL query result List into a custom structure slice in Go language? Mar 03, 2025 pm 05:18 PM

This article details efficient conversion of MySQL query results into Go struct slices. It emphasizes using database/sql's Scan method for optimal performance, avoiding manual parsing. Best practices for struct field mapping using db tags and robus

How can I define custom type constraints for generics in Go? How can I define custom type constraints for generics in Go? Mar 10, 2025 pm 03:20 PM

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

How do I write mock objects and stubs for testing in Go? How do I write mock objects and stubs for testing in Go? Mar 10, 2025 pm 05:38 PM

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

How to write files in Go language conveniently? How to write files in Go language conveniently? Mar 03, 2025 pm 05:15 PM

This article details efficient file writing in Go, comparing os.WriteFile (suitable for small files) with os.OpenFile and buffered writes (optimal for large files). It emphasizes robust error handling, using defer, and checking for specific errors.

How do you write unit tests in Go? How do you write unit tests in Go? Mar 21, 2025 pm 06:34 PM

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

How can I use tracing tools to understand the execution flow of my Go applications? How can I use tracing tools to understand the execution flow of my Go applications? Mar 10, 2025 pm 05:36 PM

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

See all articles