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62 lines
3.2 KiB
62 lines
3.2 KiB
6 years ago
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// Copyright (c) 2015, Emir Pasic. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package containers
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// EnumerableWithIndex provides functions for ordered containers whose values can be fetched by an index.
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type EnumerableWithIndex interface {
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// Each calls the given function once for each element, passing that element's index and value.
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Each(func(index int, value interface{}))
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// Map invokes the given function once for each element and returns a
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// container containing the values returned by the given function.
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// TODO would appreciate help on how to enforce this in containers (don't want to type assert when chaining)
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// Map(func(index int, value interface{}) interface{}) Container
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// Select returns a new container containing all elements for which the given function returns a true value.
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// TODO need help on how to enforce this in containers (don't want to type assert when chaining)
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// Select(func(index int, value interface{}) bool) Container
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// Any passes each element of the container to the given function and
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// returns true if the function ever returns true for any element.
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Any(func(index int, value interface{}) bool) bool
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// All passes each element of the container to the given function and
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// returns true if the function returns true for all elements.
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All(func(index int, value interface{}) bool) bool
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// Find passes each element of the container to the given function and returns
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// the first (index,value) for which the function is true or -1,nil otherwise
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// if no element matches the criteria.
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Find(func(index int, value interface{}) bool) (int, interface{})
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}
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// EnumerableWithKey provides functions for ordered containers whose values whose elements are key/value pairs.
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type EnumerableWithKey interface {
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// Each calls the given function once for each element, passing that element's key and value.
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Each(func(key interface{}, value interface{}))
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// Map invokes the given function once for each element and returns a container
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// containing the values returned by the given function as key/value pairs.
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// TODO need help on how to enforce this in containers (don't want to type assert when chaining)
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// Map(func(key interface{}, value interface{}) (interface{}, interface{})) Container
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// Select returns a new container containing all elements for which the given function returns a true value.
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// TODO need help on how to enforce this in containers (don't want to type assert when chaining)
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// Select(func(key interface{}, value interface{}) bool) Container
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// Any passes each element of the container to the given function and
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// returns true if the function ever returns true for any element.
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Any(func(key interface{}, value interface{}) bool) bool
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// All passes each element of the container to the given function and
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// returns true if the function returns true for all elements.
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All(func(key interface{}, value interface{}) bool) bool
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// Find passes each element of the container to the given function and returns
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// the first (key,value) for which the function is true or nil,nil otherwise if no element
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// matches the criteria.
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Find(func(key interface{}, value interface{}) bool) (interface{}, interface{})
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}
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