Read a tab-separated file into a map
This example Go program illustrates reading a tab-separated file into a map.
package main import ( "bufio" "fmt" "log" "os" "strings" ) func readLines(path string) (map[string] string, error) { file, err := os.Open(path) if err != nil { return nil, err } defer file.Close() lines := make(map[string]string) scanner := bufio.NewScanner(file) for scanner.Scan() { pair := strings.SplitN(scanner.Text(), "\t", 2) lines[pair[0]] = pair[1] } return lines, scanner.Err() } func main() { lines, err := readLines("fruit.txt") if err != nil { log.Fatalf("readLines: %s", err) } for i := range lines { fmt.Printf ("%s is a %s fruit\n", lines[i], i) } }
The input file looks like this
orange orange yellow lemon green lime
The output looks like this
orange is a orange fruit lemon is a yellow fruit lime is a green fruit
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