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