Problem scenario
You want to pass parameters to a function and assign the returned value to a parameter using the Go programming language. What should you do?

Solution
Prerequisite
This assumes that you have installed Golang; if you need assistance with this, see this posting.

Procedures
1.

…

Continue reading “How Do You Pass Parameters to a Function in Golang and Assign the Returned Value to a Variable?”

Problem scenario
You are running a Go program. You see this message about “command-line-arguments”:

non-name m1[“foo”] on left side of :=

What should you do?

Possible Solution
Can you try to use “=” instead of “:=”? This may fix your problem.

The := is a variable declaration and an assignment. If your map has been declared,

…

Continue reading “How Do You Troubleshoot the Go Programming Error ‘non-name m1[“foo”] on left side of :=’?”

Problem scenario
You are trying to learn to program in Go. How do you use a function?

Solution
Prerequisite
This assumes that you have installed Golang; if you need assistance with this, see this posting.

Procedures
1. Create a file called b.go with this as the content:

package main

import “fmt”

// ContintFunction will display a message
func ContintFunction() {
fmt.Println(“Hello from Continual Integration”)
}

func main() {
ContintFunction()
}

2.

…

Continue reading “How Do You Use a Function in Golang?”

Problem scenario
You want to create bytecode using Golang. What do you do.

Solution
Prerequisite
Install Golang. If you need assistance, see this posting.

Procedures
Create a Go script that you can run with go run nameOfProgram.go
Run this: go build nameOfProgram.go
Run this: ./nameOfProgram

…

Continue reading “How Do You Create Bytecode with Golang?”

Problem scenario
Lists have a fixed length number of discrete items. You want the items in the list to be strings. How do you create a list of strings in Golang?

Solution
1. Use this program called animal.go:

package main

import “fmt”

func main() {
var x [10]string
x[0] = “dog”
x[1] = “cat”
x[2] = “hamster”
x[3] = “rabbit”
x[4] = “chicken”

for i := 0; …

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Problem scenario
You want to read in user input with Golang. What should you do?

Solution
This program will illustrate how you accept user input with a Golang program:

package main

import (
“bufio”
“fmt”
“os”
)

func main() {
fmt.Println(“Please enter some text:”)
reader := bufio.NewReader(os.Stdin)
text, _ := reader.ReadString(‘\n’)
fmt.Println(“The text you entered was this: “, text)
} …

Continue reading “How Do You Read in User Input with Golang?”

Problem scenario
Your Golang program has variables with values that look like this:

{0xc4200457e8 [97 49]}

You think the that underlying variables should have regular alphabetic string values. What should you do?

Solution
Use the .string() function.

When you use strings.Builder for a variable, the value will be a hexadecimal value. To retrieve the string value that you intend,

…

Continue reading “How Do You Troubleshoot Golang Using Hexademical Values?”

Problem scenario
You run a Golang program with a function that uses a map. You get this error:

./foobar.go:33:6: missing function body
./foobar.go:33:44: syntax error: unexpected {, expecting comma or )

What should you do?

Solution
Omit the “{}” in passing map data types to the function. The syntax for declaring a map will include {}.

Here is an example of how to properly define a map:

goodmap := map[string][5]string{}

But when you are defining a function that will accept a map as a parameter,

…

Continue reading “How Do You Troubleshoot the Golang Error “missing function body”?”