Go lang
Programs
read csv file
find variable type in golang
for loops in golang
MongoDB sort() Method
MongoDB Find
MongoDB FindOne
differences between arrays and slices
InsertOne MongoDB
Connecting to MongoDB
how to use range in golang
Modules
Create a Go module
Create app using Go Module
Install
Installing GO lang

differences between arrays and slices in Golang



differences between arrays and slices in Golang

Understanding the differences between Arrays and Slices in the Go programming language, defining Arrays and Slices might look similar but it has certain amount of differences that you need to know.

Arrays

declaration of Array will takes size as mentioned below, so it cannot hold elements more than 4.

// define array, limited to capacity of 4 elements
var a[4]int

Arrays do not need to be initialized explicitly; the zero value of an array is a ready-to-use array whose elements are themselves zeroed:

so the in-memory values in variable a, will be as below

[0,0,0,0]

As we have declared Array with size 4, so its size is fixed, so it cannot have capacity to hold more elements than 4.


Slices

you can define a slice same like array, but you need not to mention its size, as like below. it capacity can be grown whatever the program required at the time of execution.

var b[]int

Add element to Slice, adds element to end of Slice and returns new Slice.

b = append(b, 2);

print the slice, the slice contains 1 element with value 2

[2]

A slice can also be created with the built-in function called make. When called, make allocates an array and returns a slice that refers to that array.

var b[]int
b = make([]int, 3, 3);

print the slice, the slice contains 3 elements with 0 value.

[0 0 0]

after calling make on Slice, still slice can size grow to hold the elements with append func.

b = append( b, 1)
b = append( b, 2)
b = append( b, 3)
b = append( b, 4)
b = append( b, 5)

output:

[0 0 0 1 2 3 4 5]

The first 3 elements was created with make, other 1 to 5 elements appended with append function.


how to use range in golang

how to use range in golang

posted on 2022-05-03 08:28:11 - Go lang Tutorials


find variable type in golang

find variable type in golang

posted on 2022-05-03 05:24:55 - Go lang Tutorials


for loops in golang

for loops in golang

posted on 2022-05-03 04:27:40 - Go lang Tutorials


Run MongoDB On WSL Ubuntu

Run MongoDB On WSL Ubuntu

posted on 2022-04-28 05:02:09 - mongodb Tutorials


Installing MongoDB

Installing MongoDB

posted on 2022-04-28 04:16:57 - mongodb Tutorials


MySQL TRIGGERS

MySQL - Triggers

posted on 2019-11-29 21:44:07 - mysql Tutorials