Dedupe

Deduplicates the elements in a given array or slice.

• Implement an appropriate function for each type.
• Use make() to create a map and an appropriate slice.
• Use range to iterate over the elements in the collection and the map to check if they have been seen before.
• Use append() to add unique values to the slice.

func DedupeInts(arr []int) []int {
    m, uniq := make(map[int]bool), make([]int, 0)
    for _, v := range arr {
        if _, ok := m[v]; !ok {
            m[v], uniq = true, append(uniq, v)
        }
    }
    return uniq
}
func DedupeFloat64s(arr []float64) []float64 {
    m, uniq := make(map[float64]bool), make([]float64, 0)
    for _, v := range arr {
        if _, ok := m[v]; !ok {
            m[v], uniq = true, append(uniq, v)
        }
    }
    return uniq
}
func DedupeStrings(arr []string) []string {
    m, uniq := make(map[string]bool), make([]string, 0)
    for _, v := range arr {
        if _, ok := m[v]; !ok {
            m[v], uniq = true, append(uniq, v)
        }
    }
    return uniq
}

DedupeInts([]int{1, 2, 1, 2, 3, 3, 4}) // [1 2 3 4]