Category "go"

Dynamically initialize array size in go

I try to write a small application in go that takes 'x' numbers of integers from standard input, calculates the mean and gives it back. I have only gotten so fa

Creating yaml list using the go template

I am looking to create a yaml file in the following format. Using Go template Custom_listeners: Config1 : config_value Config2 : config_value

What should be the values of GOPATH and GOROOT?

I'm trying to install doozer like this: $ goinstall github.com/ha/doozer I get these errors. goinstall: os: go/build: package could not be found locally g

How to initialize a struct which has a pointer-type property?

The struct is like this: type Node struct { Stat *Stat } type Stat struct { StatInfo []string } Initialize the structure, and set properties. node :=

Range on Unbuffered chan with go routines throws all goroutines are asleep - deadlock [duplicate]

I have written a sample program to do file search, it does the search but fails at the end with fatal error: all goroutines are asleep - deadl

Golang Chromedp reload current page until find some html object

chromedp.Navigate(tragetUrl), chromedp.WaitVisible("#button"), chromedp.Click("#button"), Goal: if #button is not exist then reload the current page until butt

How to pass context in golang request to middleware

I am trying to understand how the context introduced in Golang 1.7 works and what would be the appropriate way to pass it to middleware and to a HandlerFunc. Sh

One type is coerced into another, can a method to determine the type of the receiver?

If types T1 and T2 are based on type T, and type T only comes into existence from a NewT1() or NewT2(), is there any way a function func (*T) WhoAmI() can know

How to prevent go mod tidy from looking up a replaced module path

Consider the following setup: go.mod module example.com/main require example.com/sub dummy replace example.com/sub => ./sub sub/go.mod module example.com/s

Cache "go get" in docker build

I want to encapsulate my golang unit testing in a docker-compose script because it depends on several external services. My application has quite a lot of depen

Terratest - How to pass Terraform outputs between functions

I tried to use 'test_structure.SaveTerraformOptions' but it doesn't save resources IDs. For example, I'm running 2 modules - Module 1 creating the networking an

Go closure variable scope

I'm reading 'CreateSpace An Introduction to Programming in Go 2012' and on page 86 I found this evil magic func makeEvenGenerator() func() uint { i := uin

How to transform [4]byte{1,2,3,4} to "1.2.3.4" in Golang?

Here is my code which was used to transfer a byte array to string but it was failed: package main import ( "bytes" "fmt" ) type IPAddr [4]byte // TO

Go << and >> operators

Could someone please explain to me the usage of << and >> in Go? I guess it is similar to some other languages.

Default value in Go's method

Is there a way to specify default value in Go's function? I am trying to find this in the documentation but I can't find anything that specifies that this is ev

Go linter in VS code not working for packages across multiple files?

I have installed the Go extension (version 0.11.4) in Visual Studio Code on MacOS: However, I find that the linter does not 'pick up' functions defined in th

Increase Heap size in GO

Is there a way howto instruct GO runtime to use larger heaps? I am running GO 1.5. My GO process is currently spending 34% of time in GC but it uses unly 1/3 o

How do I reverse an array in Go?

http://play.golang.org/p/W70J4GU7nA s := []int{5, 2, 6, 3, 1, 4} sort.Reverse(sort.IntSlice(s)) fmt.Println(s) // 5, 2, 6, 3, 1, 4 It is hard to unde

Mock functions in Go

I'm puzzled with dependencies. I want to be able to replace some function calls with mock ones. Here's a snippet of my code: func get_page(url string) string {

How to correctly set Mock Row and Query for go-sqlmock

I'm setting up testing in golang. I use go-sqlmock to test mysql connection. But sqlmock.NewRows and mock.ExpectQuery does not work well with error. I want to k