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package govalidator
// Iterator is the function that accepts element of slice/array and its index
type Iterator func(interface{}, int)
// ResultIterator is the function that accepts element of slice/array and its index and returns any result
type ResultIterator func(interface{}, int) interface{}
// ConditionIterator is the function that accepts element of slice/array and its index and returns boolean
type ConditionIterator func(interface{}, int) bool
// ReduceIterator is the function that accepts two element of slice/array and returns result of merging those values
type ReduceIterator func(interface{}, interface{}) interface{}
// Some validates that any item of array corresponds to ConditionIterator. Returns boolean.
func Some(array []interface{}, iterator ConditionIterator) bool {
res := false
for index, data := range array {
res = res || iterator(data, index)
}
return res
}
// Every validates that every item of array corresponds to ConditionIterator. Returns boolean.
func Every(array []interface{}, iterator ConditionIterator) bool {
res := true
for index, data := range array {
res = res && iterator(data, index)
}
return res
}
// Reduce boils down a list of values into a single value by ReduceIterator
func Reduce(array []interface{}, iterator ReduceIterator, initialValue interface{}) interface{} {
for _, data := range array {
initialValue = iterator(initialValue, data)
}
return initialValue
}
// Each iterates over the slice and apply Iterator to every item
func Each(array []interface{}, iterator Iterator) {
for index, data := range array {
iterator(data, index)
}
}
// Map iterates over the slice and apply ResultIterator to every item. Returns new slice as a result.
func Map(array []interface{}, iterator ResultIterator) []interface{} {
var result = make([]interface{}, len(array))
for index, data := range array {
result[index] = iterator(data, index)
}
return result
}
// Find iterates over the slice and apply ConditionIterator to every item. Returns first item that meet ConditionIterator or nil otherwise.
func Find(array []interface{}, iterator ConditionIterator) interface{} {
for index, data := range array {
if iterator(data, index) {
return data
}
}
return nil
}
// Filter iterates over the slice and apply ConditionIterator to every item. Returns new slice.
func Filter(array []interface{}, iterator ConditionIterator) []interface{} {
var result = make([]interface{}, 0)
for index, data := range array {
if iterator(data, index) {
result = append(result, data)
}
}
return result
}
// Count iterates over the slice and apply ConditionIterator to every item. Returns count of items that meets ConditionIterator.
func Count(array []interface{}, iterator ConditionIterator) int {
count := 0
for index, data := range array {
if iterator(data, index) {
count = count + 1
}
}
return count
}
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