Whenever you need to return an io.ReadCloser, while making sure a Close() is available, you can use a NopCloser to build such a ReaderCloser. You can see one example in this fork of gorest, in util.go //Marshals the data in interface i into a byte slice, using the Marhaller/Unmarshaller specified in mime. //The Marhaller/Unmarshaller must … Read more
If you’re still interested, the go-funk package will enable you to do map/reduce/filter etc. This library is at the time of answering regularly updated. The previous library mentioned hasn’t been updated in 4 years. Github – Go Funk
Flaws Your proposed solution is not safe in a way you want it to be. One can use untyped integer constants to create new values of unary having a different int value than 1 or -1. See this example: p := unary.Positive fmt.Printf(“%v %d\n”, p, p) p = 3 fmt.Printf(“%v %d\n”, p, p) Output will … Read more
I believe you want something like this: type Person struct { Name string `json:”name”` Age int `json:”age”` } type Info map[string]Person Then, after decoding this works: fmt.Printf(“%s: %d\n”, info[“bvu62fu6dq”].Name, info[“bvu62fu6dq”].Age) Full example: http://play.golang.org/p/FyH-cDp3Na
From the documentation: Print formats using the default formats for its operands and writes to standard output. So yep, it writes to stdout.
The first method e1 := Event{Id: 1, Name: “event 1”} is initializing the variable e1 as a value with type Event. The second e2 := &Event{Id: 1, Name: “event1”} is initializing e2 as a pointer to a value of type Event As you stated in the comments, the set of methods defined on a value … Read more
In Go generics, the ~ tilde token is used in the form ~T to denote the set of types whose underlying type is T. It was also called “approximation” constraint element in the generics proposal, which explains what it’s good for in plain language: Listing a single type is useless by itself. For constraint satisfaction, … Read more
The http status 303 is the appropriate response here. So redirect the request with it. if r.Method == “POST” { saveChoice(r.Form[“choices”]) http.Redirect(w, r, newUrl, http.StatusSeeOther) } And if your newUrl is supposed to return a proper html page to the browser, you don’t need to use ajax. Use an html form. <form action=”/postHandler” method=”post”> {{range … Read more
The traditional argv[0] in C is available in os.Args[0] in Go. The flags package simply processes the slice os.Args[1:]
As mentioned by commenters, Go does not have assertions. A comparable alternative in Go is the built-in function panic(…), gated by a condition: if condition { panic(err) } This article titled “Defer, Panic, and Recover” may also be informative.