Learn Data Structures and Algorithms with Golang

The len, swap, and less methods

The sort.Interface has the len, swap, and less methods, as shown in the following code:

// Len methodfunc (ThingSorter *ThingSorter) Len() int {    return len(ThingSorter.Things)}// Swap methodfunc (ThingSorter *ThingSorter) Swap(i int, j int) {    ThingSorter.Things[i], ThingSorter.Things[j] = ThingSorter.Things[j],        ThingSorter.Things[i]}// Less methodfunc (ThingSorter *ThingSorter) Less(i int, j int) bool {    return ThingSorter.byFactor(&ThingSorter.Things[i], &ThingSorter.Things[j])}