Recent questions tagged Go

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go - Sharing a globally defined db conn with multiple packages

I've read a few StackOverflow answers on how we handling the db connection. Since it's a pool, we can ... and gin-gonic in my application. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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998 views

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go - Why isn't my Stringer interface method getting invoked? When using fmt.Println

Suppose I have the following code: package main import "fmt" type Car struct{ year int make string } func (c * ... -typing system do it's work. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Get name of struct field using reflection

What is the way of printing "Foo" here? In this example, what prints is "string". http://play.golang.org/p/ ... Field(0).Type().Name()) } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to know a buffered channel is full

How to know a buffered channel is full? I don't know to be blocked when the buffered channel is full, ... item sent to the buffered channel. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Convert interface{} to int

I'm trying to get a value from a JSON and cast it to int but it doesn't work, and I don't know how ... "Area_" + iAreaId // not reaching here See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Always have x number of goroutines running at any time

I see lots of tutorials and examples on how to make Go wait for x number of goroutines to finish, but what I' ... examples or how this is done. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - When to use os.Exit() and panic()?

Could someone explain the key differences between os.Exit() and panic() and how they are used in practice in Go? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Why add "()" after closure body in Golang?

I'm reading The Go Programming Language Specifications and found myself not truly understand with "()" after ... can explain this clearly. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Avoid checking if error is nil repetition?

I'm currently learning go and some of my code looks like this: a, err := doA() if err != nil { ... work in this case. Any other suggestion? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Bcrypt password hashing in Golang (compatible with Node.js)?

I set up a site with Node.js+passport for user authentication. Now I need to migrate to Golang, and need to ... as Node.js bcrypt with Golang? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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981 views

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go - How to check for an empty struct?

I define a struct ... type Session struct { playerId string beehive string timestamp time.Time } Sometimes I assign an ... . How do I write it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to check a channel is closed or not without reading it?

This is a good example of workers & controller mode in Go written by @Jimt, in answer to "Is there some ... function in next version of Go. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to use RWMutex in Golang?

type Stat struct { counters map[string]*int64 countersLock sync.RWMutex averages map[string]*int64 averagesLock sync.RWMutex ... we add to it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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go - Import cycle not allowed

I have a problem with import cycle not allowed It appears when I am trying to test my controller. Here is ... ? Where is the dependency wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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882 views

1 answer

go - How do you get a Golang program to print the line number of the error it just called?

I was trying to throw errors in my Golang program with log.Fatal but, log.Fatal does not also print the line ... about my code the better :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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go - Declare slice or make slice?

In Go, what is the difference between var s []int and s := make([]int, 0)? I find that both works, but which one is better? See Question&Answers more detail:os...

asked Oct 24, 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 multiply duration by integer?

To test concurrent goroutines, I added a line to a function to make it take a random time to return (up to ... How can I multiply a duration? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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908 views

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go - Can functions be passed as parameters?

In Java I can do something like derp(new Runnable { public void run () { /* run this sometime later */ ... being passed in as a parameter? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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go - Function declaration syntax: things in parenthesis before function name

I'm sorry I couldn't be more specific in the question title, but I was reading some Go code and ... difference between functions and methods". See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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847 views

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go - How to assign string to bytes array

I want to assign string to bytes array: var arr [20]byte str := "abc" for k, v := range []byte(str) { arr[k] = byte(v) } Have another method? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

go reflect - How to find the type of an object in Go?

How do I find the type of an object in Go? In Python, I just use typeof to fetch the type of object. ... case which is an array of strings. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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911 views

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go - Initialize function fields

I have a function in Go as below: func MyFunction(name, address, nick string, age, value int) { // perform ... it seems I'm missing something. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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968 views

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go - Given a method value, get receiver object

Is there a way in Go, to get the receiver object from a method value? For example, is there any such MagicFunc ... my info"} MyFunc(f.Bar) } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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956 views

1 answer

go - decode json including json encoded strings

Hey guys I am getting websocket information from external Api and it's give me json response in this way: `{ ... ignore content of text field? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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987 views

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go - Difference between golang pointers

There are 2 kinds of variables that I have. Check for the Go playground, and I don't understand why this is ... { var model Test return model } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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918 views

1 answer

go - Deploying a golang app on heroku, build succeed but application error

My golang app runs on port 9000 at my localhost. After deploying it at heroku using godep support, i was ... status=503 bytes= protocol=https See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

go - Is the main function runs as a goroutine?

Is the main() function runs as a goroutine? For example, I've seen a crash stack trace like the below, which ... .go:13 +0xc1 exit status 2 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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877 views

1 answer

go - How to convert date to different formats?

I would like to convert date format from 2010-01-23 11:44:20 to Jan 23 '10 at 11:44 in Go. I tried few ... it. Could someone help me with this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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