Recent questions tagged Go

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Reading the source code of math/floor.go, starting from line 13, I read some code like this: func Floor(x ... legal in Go's syntax? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - HandleFunc being called twice

I am following a simple web server example in Go. I inserted a log statement so that the resulting code looks ... silly that I am missing here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Why does golang compiler think the variable is declared but not used?

I am a newbee to golang, and I write a program to test io package: func main() { readers := []io. ... Why does the compiler outputs this error? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Example code for testing the filesystem in Golang

I'm trying to write a unit test for a function that will interact with the filesystem and I'd like to be able to ... ) { return os.Stat(name) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Keyed items in golang array initialization

In a pub quiz by Dave Cheney I came across the following construct: a := [...]int{5, 4: 1, 0, 2 ... ? Why not set the particular index directly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to disable "use of internal package not allowed"

I have a go program that inspects a large repository, selects some packages of interest, and then generates a ... the internal path check? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Find the path to the executable

I compile a program with Go for various platforms and run it by calling a relative path or just by its name ( ... check where the program is). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Do buffered channels maintain order?

In Go, do buffered channels have any order guarantee? For example: you have two goroutines A & B that share ... just 1 producer and 1 consumer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - JSON omitempty With time.Time Field

Trying to json Marshal a struct that contains 2 time fields. But I only want the field to come through if it has ... } fmt.Println(string(bb)) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to read multiple times from same io.Reader

I want to use request.Body(type io.ReadCloser) which is containing a image. I dont want to use ioutil. ... reference for the same reader? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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957 views

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go - How can I open files relative to my GOPATH?

I'm using io/ioutil to read a small text file: fileBytes, err := ioutil.ReadFile("/absolute/path/to/file.txt ... this is a bad design decision.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Golang embedded struct type

I have these types: type Value interface{} type NamedValue struct { Name string Value Value } type ErrorValue struct ... using it doesn't work? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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981 views

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go - Is there any way to access private fields of a struct from another package?

I have a struct in one package that has private fields: package foo type Foo struct { x int y *Foo } ... packages (perhaps something in unsafe)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - json unmarshal time that isn't in RFC 3339 format

What is the appropriate way to handle deserialization of different time formats in Go? The encoding/json package ... . Any better solutions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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836 views

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go - How to implement Memory Pooling in Golang

I implemented an HTTP server in Go. For each request, I need to create hundreds of objects for a ... of memory allocation and deallocation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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830 views

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go - Explanation of checking if value implements interface

I've read "Effective Go" and other Q&As like this: golang interface compliance compile type check , but ... if it implements an interface? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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894 views

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go - What is channel buffer size?

I'm trying to create an asynchronous channel and I've been looking at http://golang.org/ref/ ... buffer size represent/limit? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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887 views

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go - Golang: How to pad a number with zeros when printing?

How can I print a number or make a string with zero padding to make it fixed width? For instance, if I have ... and I want to make it 000012. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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go reflect - Call a Struct and its Method by name in Go?

I have found a function call MethodByName() here http://golang.org/pkg/reflect/#Value.MethodByName but it's not exactly ... (), is that right!? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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788 views

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go - Delete element in a slice

func main() { a := []string{"Hello1", "Hello2", "Hello3"} fmt.Println(a) // [Hello1 Hello2 Hello3] a = append ... does the ... (dot dot dot) do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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994 views

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go - How to parse unix timestamp to time.Time

I'm trying to parse an Unix timestamp but I get out of range error. That doesn't really makes sense to me, ... ) } fmt.Println(tm) } Playground See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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go - Meaning of a struct with embedded anonymous interface?

sort package: type Interface interface { Len() int Less(i, j int) bool Swap(i, j int) } .. ... anonymous interface Interface in struct reverse? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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954 views

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go - Converting map to struct

I am trying to create a generic method in Go that will fill a struct using data from a map[string]interface ... efficient way of doing this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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705 views

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go - How to run test cases in a specified file?

My package test cases are scattered across multiple files, if I run go test <package_name> it runs all test ... cases defined in the file? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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906 views

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go - Is it possible to capture a Ctrl+C signal and run a cleanup function, in a "defer" fashion?

I want to capture the Ctrl+C (SIGINT) signal sent from the console and print out some partial run totals. ... being SIGTERM instead of SIGINT. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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go - How to print struct variables in console?

How can I print (in the console) the Id, Title, Name, etc. of this struct in Golang? type Project struct ... Commits Commits `json:"commits"` } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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896 views

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go - When is the init() function run?

I've tried to find a precise explanation of what the init() function does in Go. I read what Effective Go ... init() feel free to correct me See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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986 views

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go - Register multiple routes using range for loop slices/map

Consider I have slice of string paths: paths := []string{"/path0", "/path1", "/path2" /*... "/ ... me the alternative to accomplished this task? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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