merger.go

// Implementation of merge task from http://raganwald.com/2015/11/03/a-coding-problem.html

package main

import (
	"fmt"
	"sort"
)

func main() {
	tests := []struct {
		a, b []int
	}{
		{
			[]int{1, 7, 11, 17},
			[]int{3, 5, 13},
		},
		{
			[]int{2, 3, 5, 7, 11},
			[]int{2, 4, 6, 8, 10, 12, 14},
		},
	}

	for _, t := range tests {
		fmt.Println(merge(t.a, t.b))
	}
}

func merge(a, b []int) []int {
	x := clone(a)
	x = append(x, clone(b)...)
	sort.Ints(x)
	return x
}

func clone(x []int) []int {
	return append(make([]int, 0, len(x)), x...)
}

Live code - http://play.golang.org/p/WBQAcHdLV9