docs/data/it-maxindexby.md
Searches the maximum value of a collection using a comparison function and returns both the value and its index.
If several values are equal to the greatest value, returns the first such value. Returns (zero value, -1) when the collection is empty. Will iterate through the entire sequence.
Examples:
// Find the maximum string by length and its index
words := it.Slice([]string{"apple", "hi", "banana", "xylophone"})
value, index := it.MaxIndexBy(words, func(a, b string) bool {
return len(a) > len(b)
})
// value: "xylophone", index: 3
// Find the maximum person by age and its index
people := it.Slice([]Person{
{Name: "Alice", Age: 30},
{Name: "Bob", Age: 25},
{Name: "Charlie", Age: 35},
})
value, index := it.MaxIndexBy(people, func(a, b Person) bool {
return a.Age > b.Age
})
// value: {Name: "Charlie", Age: 35}, index: 2
// Find the maximum number by absolute value and its index
numbers := it.Slice([]int{-5, 2, -8, 1})
value, index := it.MaxIndexBy(numbers, func(a, b int) bool {
return abs(a) > abs(b)
})
// value: -8, index: 2