Summary: Add objc test for ```NSArray``` and ```NSMutableArray```. ```NSMutableArray``` is a subclass of ```NSArray```. For documentation of ```NSArray```, https://developer.apple.com/documentation/foundation/nsarray?language=objc For documentation of ```NSMutableArray```, https://developer.apple.com/documentation/foundation/nsmutablearray?language=objc The underlying mechanism for ```NSMutableArray``` is quite complicated. It changes the underlying data structure during runtime, so it is possible to have say O(log n) complexity for accessing element in array. (See here https://opensource.apple.com/source/CF/CF-855.11/CFArray.h) However, this is unlikely to happen if the engineer does not abuse the usage of the class ```NSMutableArray``` according to at least two ios engineers. So here the complexity is set to match the normal expectation of the complexity. Reviewed By: ezgicicek Differential Revision: D22041277 fbshipit-source-id: c27f43167master
Qianyi Shu
5 years ago
committed by
Facebook GitHub Bot
parent
d5de3f78a6
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fecf954c6e
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/Foundation.h>
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// init array
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void nsarray_init_constant_FP() {
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NSArray* array = [[NSArray alloc] init];
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for (int i = 0; i < array.count; i++) {
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}
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}
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void nsarray_init_with_array_linear_FP(NSArray* array) {
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NSArray* ref_array = [[NSArray alloc] initWithArray:array];
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for (int i = 0; i < ref_array.count; i++) {
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}
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}
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void nsarray_init_with_array_constant_FP() {
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NSArray* array = [[NSArray alloc] init];
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nsarray_init_with_array_linear_FP(array);
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}
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void nsarray_init_with_array_copy_linear_FP(NSArray* array) {
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NSArray* copy_array = [[NSArray alloc] initWithArray:array copyItems:YES];
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for (int i = 0; i < copy_array.count; i++) {
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}
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}
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NSArray* nsarray_init_with_objects_constant() {
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NSString* strings[3];
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strings[0] = @"First";
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strings[1] = @"Second";
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strings[2] = @"Third";
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return [NSArray arrayWithObjects:strings count:2];
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}
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// derive new array
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NSArray* nsarray_add_object_constant(id obj) {
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NSArray* array = [[NSArray alloc] init];
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return [array arrayByAddingObject:obj];
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}
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NSArray* nsarray_add_objects_from_array_linear_FN(NSArray* append_array) {
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NSArray* array = [[NSArray alloc] init];
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return [array arrayByAddingObjectsFromArray:append_array];
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}
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// query element
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void nsarray_access_constant() {
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NSArray* array = @[ @1.0f, @2.0f, @3.0f, @4.0f, @5.0f, @6.0f, @7.0f, @8.0f ];
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for (int i = 0; i < 4; i++) {
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[array objectAtIndex:i];
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}
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}
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void nsarray_access_linear_FP(NSArray* array) {
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id obj;
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for (int i = 0; i < array.count; i++) {
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obj = array[i];
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}
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}
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void nsarray_contains_object_linear_FN(NSArray* array) {
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[array containsObject:@1];
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}
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id nsarray_first_object_constant(NSArray* array) { return array.firstObject; }
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id nsarray_last_object_constant(NSArray* array) { return array.lastObject; }
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// find element
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NSInteger nsarray_binary_search_log_FN(NSArray* sorted_array) {
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NSNumber* target = @5;
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return [sorted_array indexOfObject:target
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inSortedRange:NSMakeRange(0, sorted_array.count)
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options:NSBinarySearchingFirstEqual
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usingComparator:^(id lhs, id rhs) {
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return [lhs compare:rhs];
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}];
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}
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// sort array
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NSArray* nsarray_sort_using_descriptors_constant() {
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NSArray* array = @[ @"Grapes", @"Apples", @"Oranges" ];
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NSSortDescriptor* sd = [[NSSortDescriptor alloc] initWithKey:nil
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ascending:YES];
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return [array sortedArrayUsingDescriptors:@[ sd ]];
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}
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NSArray* nsarray_sort_using_descriptors_nlogn_FN(NSArray* array) {
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NSSortDescriptor* sd = [[NSSortDescriptor alloc] initWithKey:nil
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ascending:YES];
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return [array sortedArrayUsingDescriptors:@[ sd ]];
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}
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// iterate through array
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void nsarray_iterate_linear_FN(NSArray* array) {
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NSInteger sum = 0;
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for (id obj in array) {
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sum += (NSInteger)obj;
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}
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}
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void nsarray_enumerator_linear_FN(NSArray* array) {
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NSEnumerator* enumerator = [array objectEnumerator];
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id obj;
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NSInteger sum = 0;
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while (obj = [enumerator nextObject]) {
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sum += (NSInteger)obj;
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}
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}
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// compare array
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boolean_t nsarray_is_equal_to_array_linear_FN(NSArray* array1,
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NSArray* array2) {
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return [array1 isEqualToArray:array2];
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}
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@ -0,0 +1,124 @@
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/Foundation.h>
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// init array
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void nsmarray_init_with_capacity_constant_FP() {
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NSMutableArray* table = [[NSMutableArray alloc] initWithCapacity:256];
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for (int i = 0; i < table.count; i++) {
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table[i] = @"somevalue";
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}
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}
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// add element
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void nsmarray_empty_ok_costant() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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[array insertObject:@1 atIndex:0];
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}
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void nsmarray_add_in_loop_constant_FP() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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for (int i = 0; i < 10; i++) {
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[array addObject:[NSNumber numberWithInt:i]];
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}
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for (int i = 0; i < array.count; i++) {
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}
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}
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void nsmarray_add_in_loop_linear(NSUInteger n) {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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for (int i = 0; i < n; i++) {
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[array addObject:[NSNumber numberWithInt:i]];
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}
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for (int i = 0; i < n; i++) {
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}
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}
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void nsmarray_add_in_loop_quadratic(NSUInteger n, NSUInteger m) {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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for (int i = 0; i < n; i++) {
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for (int j = 0; j < m; j++) {
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[array addObject:[NSNumber numberWithInt:i + j]];
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}
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}
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}
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void nsmarray_add_then_loop_constant_FP() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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[array addObject:@0];
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[array addObject:@1];
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[array addObject:@2];
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[array addObject:@3];
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[array addObject:@4];
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[array addObject:@5];
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[array addObject:@6];
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[array addObject:@7];
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[array addObject:@8];
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[array addObject:@9];
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[array addObject:@10];
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for (int i = 0; i < array.count; i++) {
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}
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}
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void nsmarray_add_all_constant() {
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NSMutableArray* array1 = [[NSMutableArray alloc] init];
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[array1 addObject:@2];
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[array1 addObject:@3];
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NSMutableArray* array2 = [[NSMutableArray alloc] init];
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[array2 addObject:@0];
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[array2 addObject:@1];
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NSIndexSet* index_set = [[NSIndexSet alloc] initWithIndex:0];
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[array2 addObjectsFromArray:array1];
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}
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// set element
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void nsmarray_set_constant(NSMutableArray* array) { array[0] = @1; }
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void nsmarray_set_linear_FP(NSMutableArray* array) {
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for (int i = 0; i < array.count; i++) {
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array[i] = [NSNumber numberWithInt:([array[i] intValue] + 1)];
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}
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}
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void nsmarray_set_constant_FP() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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[array addObject:@0];
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[array addObject:@1];
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[array addObject:@2];
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for (int i = 0; i < array.count; i++) {
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array[i] = [NSNumber numberWithInt:i];
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}
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}
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// remove element
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id nsmarray_reomove_constant() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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[array addObject:@0];
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[array addObject:@1];
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[array removeObjectAtIndex:0];
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return array[0];
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}
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void nsmarray_remove_in_loop_constant_FP() {
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NSMutableArray* array = [[NSMutableArray alloc] init];
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for (int i = 0; i < 10; i++) {
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[array addObject:[NSNumber numberWithInt:i]];
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}
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for (int i = 0; i < array.count; i++) {
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[array removeObjectAtIndex:i];
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}
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}
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