strings.TrimSpace(s) For example, package main import ( “fmt” “strings” ) func main() { s := “\t Hello, World\n ” fmt.Printf(“%d %q\n”, len(s), s) t := strings.TrimSpace(s) fmt.Printf(“%d %q\n”, len(t), t) } Output: 16 “\t Hello, World\n ” 12 “Hello, World”
Update 26th July 2019 (for go >=1.11) go run . Will work on windows as well. Original answer (for non windows environments) The code actually works. The problem was that instead of running go run main.go I should run: go run *.go
The compiler is pointing the error to you, you’re comparing a structure instance and nil. They’re not of the same type so it considers it as an invalid comparison and yells at you. What you want to do here is to compare a pointer to your config instance to nil, which is a valid comparison. … Read more
The title of your question is: How to join a slice of strings into a single string? but in fact, reg is not a slice, but a length-three array. […]string is just syntactic sugar for (in this case) [3]string. To get an actual slice, you should write: reg := []string {“a”,”b”,”c”} (Try it out: https://play.golang.org/p/vqU5VtDilJ.) … Read more
Go dependency management summary: vgo if your go version is: x >= go 1.11 dep or vendor if your go version is: go 1.6 >= x < go 1.11 Manually if your go version is: x < go 1.6 Edit 3: Go 1.11 has a feature vgo which will replace dep. To use vgo, see … Read more
Here is an illustration of your first import cycle problem. project/controllers/account ^ \ / \ / \ / \/ project/components/mux <— project/controllers/base As you can see with my bad ASCII chart, you are creating an import cycle when project/components/mux imports project/controllers/account. Since Go does not support circular dependencies you get the import cycle not allowed … 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
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
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