71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
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// NSDictionary+LinqExtensions.h
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// LinqToObjectiveC
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//
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// Created by Colin Eberhardt on 25/02/2013.
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// Copyright (c) 2013 Colin Eberhardt. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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typedef id (^LINQKeyValueSelector)(id key, id value);
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typedef BOOL (^LINQKeyValueCondition)(id key, id value);
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/**
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Various NSDictionary extensions that provide a Linq-style query API
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*/
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@interface NSDictionary (QueryExtension)
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/** Filters a dictionary based on a predicate.
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@param predicate The function to test each source key-value pair for a condition.
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@return A dictionary that contains key-value pairs from the input dictionary that satisfy the condition.
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*/
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- (NSDictionary*) linq_where:(LINQKeyValueCondition)predicate;
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/** Projects each element of the dictionary into a new form.
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@param selector A transform function to apply to each element.
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@return A dicionary whose elements are the result of invoking the transform function on each key-value pair of source.
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*/
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- (NSDictionary*) linq_select:(LINQKeyValueSelector)selector;
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/** Projects each element of the dictionary to a new form, which is used to populate the returned array.
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@param selector A transform function to apply to each element.
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@return An array whose elements are the result of invoking the transform function on each key-value pair of source.
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*/
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- (NSArray*) linq_toArray:(LINQKeyValueSelector)selector;
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/** Determines whether all of the key-value pairs of the dictionary satisfies a condition.
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@param condition The condition to test key-value pairs against.
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@return Whether any of the element of the dictionary satisfies a condition.
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*/
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- (BOOL) linq_all:(LINQKeyValueCondition)condition;
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/** Determines whether any of the key-value pairs of the dictionary satisfies a condition.
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@param condition The condition to test key-value pairs against.
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@return Whether any of the element of the dictionary satisfies a condition.
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*/
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- (BOOL) linq_any:(LINQKeyValueCondition)condition;
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/** Counts the number of key-value pairs that satisfy the given condition.
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@param condition The condition to test key-value pairs against.
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@return The number of elements that satisfy the condition.
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*/
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- (NSUInteger) linq_count:(LINQKeyValueCondition)condition;
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/** Merges the contents of this dictionary with the given dictionary. For any duplicates, the value from
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the source dictionary will be used.
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@param dic The dictionary to merge with.
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@return A dictionary which is the result of merging.
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*/
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- (NSDictionary*) linq_Merge:(NSDictionary*)dic;
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@end
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