Exception or error: I want to get string from stdio with func (b *Reader) ReadLine() (line []byte, isPrefix bool, err error) but my code doent work correctly. I’m leaning about golang. I want to know about how to get string from standard input with ReadLine() I know, fmt.Scan or Scanner help me, but I want …
Tag: gostring
gin gonic – How to unmarshall Go struct field of type map[string]interface-ThrowExceptions
Exception or error: I am trying to unmarshall multidimensional JSON. My JSON is contains dynamic key therefore I can’t do it. JSON { “id”:”3″, “datetime”:”2019-06-08″, “metadata”:[{“a”:”A”},{“b”:”B”}] } Go file type Chats struct { Id string json:”id” Datetime string json:”date” Metadata string json:”metadata” } chat := models.Chats{} err := c.BindJSON(&chat) if err != nil { c.Error(err) …
How to run go code dynamically from string?-ThrowExceptions
Exception or error: I need to execute code dynamically, for example to run fmt.Print(“hello”) (in string format), maybe what I am looking for is a go virtual machine? With go-playground, we can type the code and execute it, how does that work behind? The worst solution would be to write string code to a file …
found packages strings (build.go) and filedirs(reader.go) in /usr/local/go/src/strings-ThrowExceptions
Exception or error: I almost give up, just learned go and already having problems these are lines that causes trouble s := strings.ToUpper(tmp.String()) if _, err := io.Copy(f2, strings.NewReader(s)); err != nil { return err } I followed tutorial from packtub. please help me how to solve it. thanks edit: this is what I put …
go – Cannot use args (type []string) as type []interface {}-ThrowExceptions
Exception or error: This question already has answers here: Type converting slices of interfaces (6 answers) Closed 6 months ago. my golang sqlite insert function. i’m using this package “github.com/mattn/go-sqlite3” func Insert(args …string)(err error){ db, err:=sql.Open(“sqlite3″,”sqlite.db”) if err !=nil { return } q, err := db.Prepare(args[0]) if err !=nil{ return } _,err = q.Exec(args[1:]…) return …
go – How to printed type bebore change type of String method-ThrowExceptions
Exception or error: I cannot call Print on a type before change string method that has a String method inside the type’s String method: type book struct{ id int r relateF //Or can be delare as r relateF } type relateF struct{ handle int grade float64 name string } func(b book) String() string{ fmt.Println(b)//<=I want …
go – How to parse QueryString-ThrowExceptions
Exception or error: I have a string such as username=Test1234¤cy=THB and I need to get value of username or currency qry, _ := url.Parse(string(qryString)) How to solve: An example is as follows: package main import ( “fmt” “net/url” ) func main() { address := “http://example.com?name=poloxue&age=11” u, err := url.Parse(address) if err != nil { panic(err) …
How to convert an array of bytes to an array of strings in Go?-ThrowExceptions
Exception or error: I’m trying to complete this exercise in the Tour of Go, https://tour.golang.org/methods/18, to implement a String() method for an IPAddr type consisting of an array of four bytes. So far I’ve tried: package main import ( “fmt” “strings” ) type IPAddr [4]byte func (ipaddr IPAddr) String() string { ipaddrStrings := make([]string, 4) …
go – bufio.Scanner: how to know if we are processing a new line or a truncated string?-ThrowExceptions
Exception or error: I basically need to process each string line from a limited buffer that is read from a stream. Using the bufio.Scanner I can go line-by-line with the scanner but had to use what seems to be an over-complicated solution to detect “truncation”. Is there a better way of doing this? Thanks a …