How to Convert Between Slices and Iterators in Go

Use slices.All, slices.Any, or slices.Contains to convert a slice into an iterator-like check, or use slices.IndexFunc to find an element; for full iteration, use a standard for loop with range as Go does not have a native iterator type like other languages.

import "slices"

// Check if all elements satisfy a condition
allEven := slices.All(numbers, func(n int) bool { return n%2 == 0 })

// Check if any element satisfies a condition
hasEven := slices.Any(numbers, func(n int) bool { return n%2 == 0 })

// Find the first element satisfying a condition
idx, found := slices.IndexFunc(numbers, func(n int) bool { return n > 10 })

// Standard iteration (closest to an iterator)
for i, v := range numbers {
    // process v
}

Go does not have a built-in "iterator" object that you can pass around like in Python or Java. Instead, you use the slices package (Go 1.21+) to perform common iterator tasks like checking if all items match a rule or finding a specific item. If you need to process every item one by one, you simply use the standard for ... range loop, which is the idiomatic way to iterate over slices in Go.