It Reject - Lo — ContextQMD

Reject is the opposite of Filter, this method returns the elements of collection that predicate does not return true for.

collection := func(yield func(int) bool) {
    yield(1)
    yield(2)
    yield(3)
    yield(4)
}

filtered := it.Reject(collection, func(x int) bool {
    return x%2 == 0
})
var result []int
for item := range filtered {
    result = append(result, item)
}
// result contains [1, 3]

RejectI is the opposite of Filter, this method returns the elements of collection that predicate does not return true for, with index.

collection := func(yield func(string) bool) {
    yield("a")
    yield("b")
    yield("c")
}

filtered := it.RejectI(collection, func(item string, index int) bool {
    return index == 1
})
var result []string
for item := range filtered {
    result = append(result, item)
}
// result contains ["a", "c"]

RejectMap returns a sequence obtained after both filtering and mapping using the given callback function. The callback function should return two values: the result of the mapping operation and whether the result element should be included or not.

collection := func(yield func(int) bool) {
    yield(1)
    yield(2)
    yield(3)
    yield(4)
}

filtered := it.RejectMap(collection, func(x int) (string, bool) {
    return fmt.Sprintf("item-%d", x), x%2 == 0
})
var result []string
for item := range filtered {
    result = append(result, item)
}
// result contains ["item-1", "item-3"]