Try: mkdir -p $GOPATH/bin The error you’re seeing is the installation directory doesn’t exist, so install can’t do anything. Also, there’s a typo here: export GOPATH=”/Users/skan/Documetns/study/golang” So, same reasoning, but, try Documents solved For more details see: ’go help gopath’
You want a space-padded ascii representation of a number as bytes? fmt.Sprintf produces a string, which you can then convert to bytes. Here’s some code, or run it on the playground. package main import “fmt” func main() { bs := []byte(fmt.Sprintf(“%2d”, 7)) fmt.Println(bs) } 0 solved Golang – Add int to end of byte array
The key is in this function: func fib(x int) int { if x < 2 { return x } return fib(x-1) + fib(x-2) } If x<2 the function returns immediately, if not it retrieves the result from a call to fib with a smaller value of x For recursive calls there are the 3 Laws … Read more
Did you take a look at the Go tutorial at http://golang.org/doc/go_tutorial.html Here’s how to compile and run our program. With 6g, say, $ 6g helloworld.go # compile; object goes into helloworld.6 $ 6l helloworld.6 # link; output goes into 6.out $ 6.out Hello, world; or Καλημέρα κόσμε; or こんにちは 世界 $ With gccgo it looks … Read more
The extra requests are your browser trying to access /favicon.ico You can see this, for example, if you print the http.Request to stdout in your handler funcs. 3 solved Running a simple server, but the counter seems to go up by 3, why? [duplicate]
Your fmt.Scanf(“%d”, &i) call only parses an integer from the input, it does not consume input until the end of line. If you input 3.ls, then 3 is parsed as the decimal number, and . is consumed and will stop the scanning. Your app ends here, so the rest (ls and the newline) will be … Read more
First, you declared Consumer as a chan of interface{ /* methods */ }, which most surely isn’t what you want — as a matter of fact, the error tells that you can’t assign IntChannel to it. Then, until generics are added to the language, you don’t have a way to preserve type safety. The closest … Read more
It looks in the path you specify in your http.Dir expression. /public in your case. Most likely you don’t have a path called /public on your system (since this is a non-standard directory path on all OSes I’m familiar with, and I suspect you haven’t created it). Change /public to match the path where you … Read more
Is it guaranteed that the order of the pointers remains the same? (For example, I can imagine some GC trickery which also reorders the data.) In answer to this part of your question, it doesn’t look like it. See pkg unsafe linked below. If you want the memory address of a pointer, try the unsafe … Read more
By default, the Go compiler targets the architecture you are running. You can set the GOARCH environment variable to override this. See: https://golang.org/pkg/go/build/ 1 solved How does the compiler select the architecture for asm_*.S files?
As per docs Print: will print number variables, and will not include a line break at the end. Printf: will not print number variables, and will not include a line break at the end. Printf is for printing formatted strings. And it can lead to more readable printing. For more detail visit this tutorial. solved … Read more
The read tcp […]->[…]: i/o timeout error is generated here. The underlying timeout error is defined here. solved Locating the “read tcp” error in the Go source code
Your code needs to wait for the routines to finish before exiting. A good way to do this is to pass in a channel which is used by the routine to signal when it’s done and then wait in the main code. See below. Another advantage of this approach is that it allows/encourages you to … Read more
Actually the code in question works on unix systems, but usually the problem is that calls like fmt.Scanf(“%f”, &x1) does not consume newlines, but quoting from package doc of fmt: Scanning: Scan, Fscan, Sscan treat newlines in the input as spaces. And on Windows the newline is not a single \n character but \r\n, so … Read more
You are trying to append pointer to struct to the slice of Product not slice of *Product. Quick solution would be to change var products []Product into var products []*Product solved How can I change the package type when calling a method? [closed]