Find function for arrays/slices
How to write a functional Find function in golang using generics
Find returns the first element in the input slice for which the predicate function returns true, along with a boolean indicating if such an element was found. The function f takes an element of type A and returns a boolean.
func Find[A any](input []A, f func(A) bool) (A, bool) {
for _, v := range input {
if f(v) {
return v, true
}
}
var defaultVal A
return defaultVal, false
}
and this is a unittest for the function:
func TestFind(t *testing.T) {
input := []int{1, 2, 3, 4, 5}
f := func(a int) bool {
return a == 3
}
expected := 3
result, found := util.Find(input, f)
if !found || result != expected {
t.Errorf("Expected %v, got %v", expected, result)
}
}