Paris  Kessler

Paris Kessler

1670859900

How to Concatenate Two Or More Slices in Golang

In this golang tutorial we will learn How to Concatenate Two Or More Slices in Golang. In this tutorial, you’ll learn how you can concatenate two slices of the same type in Go.

Go language provides a built-in function append() to combine two or more slices of the same type.

append() function accepts two or more arguments, it returns a new slice

newSlice := append([]int{1,2,3}, 4, 5)
// []int{1,2,3,4,5}

To merge two slices, we use the operator as a postfix to the second slice

Solution

package main

import "fmt"

func main() {
    slice1 := []int{1, 2, 3}
    slice2 := []int{4, 5, 6, 7}

    slice3 := append(slice1, slice2...)

    fmt.Println(slice3)
}

Original article sourced at: https://surajsharma.net

#golang #go 

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How to Concatenate Two Or More Slices in Golang
Anda Lacacima

Anda Lacacima

1599722732

A Comprehensive Guide to Slices in Golang

In this article, we will go over the concept of a “slice” which is an important data structure used in Golang. A slice is a data structure that provides a way for you to work with — and manage collections of — data. Slices are built around the concept of dynamic arrays that can grow and shrink as you see fit.

  • Slices are dynamic in terms of growth because they have their own built-in function called append which can grow a slice quickly and efficiently.
  • You can also reduce the size of a slice by slicing out a part of the underlying memory.
  • Slices give you all the benefits of indexing, iteration, and garbage collection optimizations because the underlying memory is allocated in contiguous blocks.

#datastrucutre #data-types-in-golang #arrays #golang #slice

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Make, New & Literals Cheat Sheet - Slice and Map Initialization in Go

There are quite a few ways to create new maps and slices in Go. Which one is best? Or perhaps better asked, which one is best in your situation? Let’s take a look.

Slices

var varStyle []string

literalStyle := []string{}

newStyle := new([]string)

makeStyle := make([]string, 0)

var varStyle []string is the idiomatic way to declare an empty slice. The slice is actually nil, which means it will be null when marshalled to JSON and will succeed nil checks.

literalStyle := []string{} should probably only be used when the literal is going to start with values in it, as in literalStyle := []string{“cat”, “dog”, etc}. Otherwise prefer make()

newStyle := new([]string) returns a pointer to the slice. Same as ptrStyle := &[]string{}Only use if you want a pointer.

makeStyle := make([]string, 0) is the same as the literal style, but is preferred for idiomatic reasons when the slice doesn’t need non-zero starting values. Make() allows the slice to be initialized with a starting length and capacity, which can have good performance implications in some circumstances:

makeStyle := make([]string, len, cap)

#clean code #golang #programming #go #golang #make #map #slice

Golang Web Development:Th Best Programming Language in 2020

https://www.mobinius.com/blogs/golang-web-development-company

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Paris  Kessler

Paris Kessler

1670859900

How to Concatenate Two Or More Slices in Golang

In this golang tutorial we will learn How to Concatenate Two Or More Slices in Golang. In this tutorial, you’ll learn how you can concatenate two slices of the same type in Go.

Go language provides a built-in function append() to combine two or more slices of the same type.

append() function accepts two or more arguments, it returns a new slice

newSlice := append([]int{1,2,3}, 4, 5)
// []int{1,2,3,4,5}

To merge two slices, we use the operator as a postfix to the second slice

Solution

package main

import "fmt"

func main() {
    slice1 := []int{1, 2, 3}
    slice2 := []int{4, 5, 6, 7}

    slice3 := append(slice1, slice2...)

    fmt.Println(slice3)
}

Original article sourced at: https://surajsharma.net

#golang #go