No, there’s nothing wrong with assert as long as you use it as intended. That is, it’s supposed to be for catching cases that “can’t happen”, during debugging, as opposed to normal error handling. Assert: A failure in the program’s logic itself. Error Handling: An erroneous input or system state not due to a bug … Read more
Command go Download and install packages and dependencies Usage: go get [-d] [-f] [-t] [-u] [-v] [-fix] [-insecure] [build flags] [packages] Get downloads the packages named by the import paths, along with their dependencies. It then installs the named packages, like ‘go install’. The -d flag instructs get to stop after downloading the packages; that … Read more
Note that you can run go test “recursively”: you need to list all the packages you want to test. If you are in the root folder of your Go project, type: go test ./… The ‘./…‘ notation is described in the section “Description of package lists” of the “command go“: An import path is a … Read more
As of Go 1.8 you can now use sort.Slice to sort a slice: sort.Slice(planets, func(i, j int) bool { return planets[i].Axis < planets[j].Axis }) There is normally no reason to use an array instead of a slice, but in your example you are using an array, so you have to overlay it with a slice … Read more
Please read “How to Write Go Code”. Use go build or go install within the package directory, or supply an import path for the package. Do not use file arguments for build or install. While you can use file arguments for go run, you should build a package instead, usually with go run ., though … Read more
https://groups.google.com/group/golang-nuts/msg/71c307e4d73024ce?pli=1 The germane part: Since integer types use two’s complement arithmetic, you can infer the min/max constant values for int and uint. For example, const MaxUint = ^uint(0) const MinUint = 0 const MaxInt = int(MaxUint >> 1) const MinInt = -MaxInt – 1 As per @CarelZA’s comment: uint8 : 0 to 255 uint16 : … Read more
Have a look at the docs for encoding/json.Marshal. It discusses using struct field tags to determine how the generated json is formatted. For example: type T struct { FieldA int `json:”field_a”` FieldB string `json:”field_b,omitempty”` } This will generate JSON as follows: { “field_a”: 1234, “field_b”: “foobar” }
Each time you set the same seed, you get the same sequence. So of course if you’re setting the seed to the time in a fast loop, you’ll probably call it with the same seed many times. In your case, as you’re calling your randInt function until you have a different value, you’re waiting for … Read more
The Go linker (go tool link) has an option to set the value of an uninitialised string variable: -X importpath.name=value Set the value of the string variable in importpath named name to value. Note that before Go 1.5 this option took two separate arguments. Now it takes one argument split on the first = sign. … Read more
It’s worth noting that the words “stack” and “heap” do not appear anywhere in the language spec. Your question is worded with “…is declared on the stack,” and “…declared on the heap,” but note that Go declaration syntax says nothing about stack or heap. That technically makes the answer to all of your questions implementation … Read more