underscore/orderBy.go
Andy Long 581929a555 Adding a Unit test for JoinProject function
Updated the comments on the Join & OrderBy functions so they make a little more sense.

Covered an extra test case with the Join test, where the left set has more data than the right and so the Right handside array of the join is empty
2022-09-03 23:23:26 +01:00

26 lines
614 B
Go

package underscore
// Orders a slice by a field value within a struct, the predicate allows you
// to pick the fields you want to orderBy. Use > for ASC or < for DESC
// func (left Person, right Person) bool { return left.Age > right.Age }
func OrderBy[T any](list []T, predicate func(T, T) bool) []T {
swaps := true
var tmp T
//todo: replace with a faster algorithm, this one is pretty simple
for swaps {
swaps = false
for i := 0; i < len(list)-1; i++ {
if predicate(list[i], list[i+1]) {
swaps = true
tmp = list[i]
list[i] = list[i+1]
list[i+1] = tmp
}
}
}
return list
}