You seem to want to POST a query, which would be similar to this answer: import ( “bytes” “fmt” “io/ioutil” “net/http” ) func main() { url := “http://xxx/yyy” fmt.Println(“URL:>”, url) var query = []byte(`your query`) req, err := http.NewRequest(“POST”, url, bytes.NewBuffer(query)) req.Header.Set(“X-Custom-Header”, “myvalue”) req.Header.Set(“Content-Type”, “text/plain”) client := &http.Client{} resp, err := client.Do(req) if err != … Read more
If you model your JSON object with a struct and you unmarshal into a value of that, then you don’t need those ugly indices and type assertions, you can simply refer to struct fields. Note that you don’t have to be afraid of the response being complex, you only need to model the parts you … Read more
The command is installed as $HOME/go/bin/shfmt (unless GOBIN is set, then it’s $GOBIN/shfmt): $ go help install usage: go install [-i] [build flags] [packages] Install compiles and installs the packages named by the import paths. Executables are installed in the directory named by the GOBIN environment variable, which defaults to $GOPATH/bin or $HOME/go/bin if the … Read more
That depends of the definition of your structs. if you want only the array of items, you should unmarshal the main structure and then get the items array. something like this package main import ( “encoding/json” “fmt” “io/ioutil” “os” ) type Structure struct { Items []Item `json:”items”` } type Item struct { ID int `json:”id”` … Read more
If you want to go with the $GOPATH way, then this is still working on go1.14.1: You can put both projects (not using gomodules) inside your GOPATH: Project foo is under GOPATH/src/foo/ Project, our lib, greeting is under GOPATH/src/myfancycompany/greeting/ Our goal is that foo will import greeting. Then foo/main.go will look like this: package main … Read more
It’s mentioned in Spec: Arithmetic operators: &^ bit clear (AND NOT) So it computes the AND connection of the first operand and the negated value of the second operand. Its name “bit clear” comes from what it does. Examined using it on two 1-bit value: if the second operand is 1, it means to “clear”: … Read more
Normally, one should use url package’s Values. Here’s an example, that does what I think you want, on play Both a simple main, and in http.HandlerFunc form: package main import “fmt” import “net/url” import “net/http” func main() { baseURL := “https://www.example.org/3/search/movie” v := url.Values{} v.Set(“query”, “this is a value”) perform := baseURL + “?” + … Read more
The most portable way to do path concatenation is by using filepath.Join: import “path/filepath” file, err := os.Open(filepath.Join(“XML”, fileinfo.Name())) solved Go: Inline string concatenation
What you are trying to do is not possible with plain TCP. TCP works on plain IP-Addresses without domains. To explain what is going on: When you are establishing a connection to, e.g. example.com, first of all a DNS Lookup for example.com is done. In this case, the DNS Lookup would result in 93.184.216.34. You … Read more
Could the Rust program be written in an idiomatic way, to execute faster? Yes. To create a vector with a few elements, use the vec![] macro: let mut work: Vec<f64> = vec![0.0, 1.0]; for _x in 1..100000000 { work.swap(0, 1); } So is this code faster? Yes. Have a look at what assembly is generated: … Read more
As discussed in the comments of Why is 5726718050568503296 truncated in JS as others have mentioned, this is caused by the way toString() is implemented in JavaScript which appears to use the minimium number of significant digits to return the same represented number, rather than returning the mathematically closest number. You can however replicate this … Read more
However, in some cases I am just interested in the latest value of a variable or field of an object. Here is the fundamental problem: What does the word “latest” mean? Suppoose that, mathematically speaking, we have a sequence of values Xi, with 0 <= i < N. Then obviously Xj is “later than” Xi … Read more
Let’s say that you pass the string XII to your function. That makes len(s) 3, which means that the body of your loop would (if the panic didn’t occur) execute 4 times (when i is 0, 1, 2 and 3 since your condition is i <= len(s). On the iteration where i is 2 (i.e. … Read more
The original question: Incorrect floor number in golang I have problem when use Math.Floor with float variable (round down/truncate the precision part). How can i do it correctly? package main import ( “fmt” “math” ) func main() { var st float64 = 1980 var salePrice1 = st * 0.1 / 1.1 fmt.Printf(“%T:%v\n”, salePrice1, salePrice1) var … Read more
If you want to test a method that contains template which is executing inside that particular method then you have to provide the absolute path. Follow these steps: Set current working directory in your terminal: export varname=”absolutepath” For example: export PATH=”/go/src/github.com/project1″ Use this command in your terminal: echo $varname For example: echo $PATH /go/src/github.com/project1 It … Read more