A nice little command to set up a small Go "playground" (see also: play.golang.org) in a temporary directory

goplayground

#!/bin/bash

while true; do
    DIR=/tmp/`printf %05d $RANDOM`
    if [[ ! -e $DIR ]]; then
        break
    fi
done

echo Making $DIR
mkdir $DIR
cd $DIR

cat << EOF > main.go
package main

import "fmt"

func main() {
    fmt.Println("Hello, playground")
}
EOF
vim main.go

echo Output:
go build -o a.out && ./a.out

Note: you'll want to make sure that it's indented with a tab on line 20, if you copy-paste this (even the "raw" version seems to have 4 spaces inserted instead of a tab... sigh...)