go

问题 I'm trying to call C function with same signature they take 2 int arguments. and this error cannot call non-function f (type unsafe.Pointer) appear during compile. package main /* int add(int a, int b) { return a+b; } int sub(int a, int b) { return a-b; } */ import "C" import ( "fmt" "unsafe" ) func main() { a := C.int(1) b := C.int(2) fx := make([]unsafe.Pointer, 2) fx[0] = C.add fx[1] = C.sub for _, f := range fx { fmt.Printf("Result: %d\n", f(a, b)) } } Now I'm working around with wrap C

问题 I am using the BurntSushi library to load a TOML configuration file in my GO application. I have followed the instructions on the library to write the structs and the configuration toml file itself. I am running into some trouble, and I cant seem to find the source of my issues. Here are the details: Structs: package main //ConfigurationParameters provides the struct to hold configuration parameters from config file type ConfigurationParameters struct { Title string //serviceDiscovery

问题 Description I wanted to set up a personal website with blogdown , using the Academic Hugo theme. I almost read the entire book of blogdown: Creating Websites with R Markdown and several tutorials, like Allison Hill's or Annie Lyu's. I have chosen blogdown because I am familiar with RStudio and R and Academic because there are suggestions in the references to pick a maintained theme, like Academic. I installed blogdown and Hugo as the book suggests and tried to install the theme by the RStudio

问题 I'd like to marshal part of this struct: type ValueSet struct { Id string `json:"id" bson:"_id"` Url string `bson:"url,omitempty" json:"url,omitempty"` Identifier *Identifier `bson:"identifier,omitempty" json:"identifier,omitempty"` Version string `bson:"version,omitempty" json:"version,omitempty"` Name string `bson:"name,omitempty" json:"name,omitempty"` Status string `bson:"status,omitempty" json:"status,omitempty"` Experimental *bool `bson:"experimental,omitempty" json:"experimental

问题 I am trying to make a code to scan from a folder link all my files and make a "top 10" by his size with also a regexp based on his content and his name. file. By it content, I make channels with goroutines but I dont understand why each time my goroutines are locked. Here is my code: package main import ( "flag" "fmt" "io/ioutil" "regexp" "runtime" "sort" "sync" "time" ) var rName = ".php" var rContent = "php" var maxSize, minSize int64 var files_ten []File func main() { start := time.Now()

问题 I am querying an inlfluxdb databse from a go code like this. q := fmt.Sprintf("select step,timeTaken from ZtpBoot where cvpVersion = 2017.1.1 group by step,numberOfDevices" res, _ := queryDB(clnt, q) Result when executing query in influxdb is like:- name: ZtpBoot tags: numberOfDevices=2, step=Step3.verifyZtpViaPost time step timeTaken ---- ---- --------- 1495540747000000000 Step3.verifyZtpViaPost 0.108520030975 1495541643000000000 Step3.verifyZtpViaPost 0.115226984024 name: ZtpBoot tags:

问题 I have attempted to write a generic function that can execute functions in parallel or sequentially. While testing it, I have found some very unexpected behavior regarding closures. In the code below, I define a list of functions that accept no parameters and return an error. The functions also use a for loop variable in a closure but I'm using the trick of defining a new variable within the loop in an attempt to avoid capture. I'm expecting that I can call these functions sequentially or

问题 I am working on Dgraph and Go integration.I am trying to access Dgraph query in Go and for that I am using github.com/dgraph-io/dgo library. Here is the code : package main import ( "bytes" "context" "fmt" "io/ioutil" "log" "github.com/dgraph-io/dgo" "github.com/dgraph-io/dgo/protos/api" "google.golang.org/grpc" ) func main() { query := `{ people(func: has(name)) { name follows{ name } } }` conn, err := grpc.Dial("x.x.x.x:8000", grpc.WithInsecure()) if err != nil { log.Fatal(err) } ctx :=

问题 I'm using net.http.client After sending the request with resp, err := Client.Do(req) I'm getting the error I want to work with. err.Error() returns an error as string. But I need to work with error as an object. I found the method Unwrap() that seems to be returning an url.Error object, but I'm getting err.Unwrap undefined (type error has no field or method Unwrap) Sorry for dumb question, I'm totally new to golang. 回答1: According to the documentation, any error returned from Client.Do will

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago . Improve this question I am using mocks in unit testing in Golang. But how to get the difference between stub and mock in the implementation code in Golang? 回答1: Intention of mocks and stubs in GO is the same as different programming languages: stub is replacement for some dependency in your code