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1 | 1 | /* |
2 | | - * Copyright (C) 2015 - 2018, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>. |
3 | | - * All rights reserved. |
4 | | - * |
5 | | - * Redistribution and use in source and binary forms, with or without |
6 | | - * modification, are permitted provided that the following conditions are met: |
7 | | - * |
8 | | - * * Redistributions of source code must retain the above copyright notice, this |
9 | | - * list of conditions and the following disclaimer. |
10 | | - * |
11 | | - * * Redistributions in binary form must reproduce the above copyright notice, |
12 | | - * this list of conditions and the following disclaimer in the documentation |
13 | | - * and/or other materials provided with the distribution. |
14 | | - * |
15 | | - * * Neither the name of CosmicMind nor the names of its |
16 | | - * contributors may be used to endorse or promote products derived from |
17 | | - * this software without specific prior written permission. |
18 | | - * |
19 | | - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
20 | | - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | | - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
22 | | - * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
23 | | - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | | - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
25 | | - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
26 | | - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
27 | | - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | | - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | | - */ |
| 2 | +* Copyright (C) 2015 - 2018, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.com>. |
| 3 | +* All rights reserved. |
| 4 | +* |
| 5 | +* Redistribution and use in source and binary forms, with or without |
| 6 | +* modification, are permitted provided that the following conditions are met: |
| 7 | +* |
| 8 | +* * Redistributions of source code must retain the above copyright notice, this |
| 9 | +* list of conditions and the following disclaimer. |
| 10 | +* |
| 11 | +* * Redistributions in binary form must reproduce the above copyright notice, |
| 12 | +* this list of conditions and the following disclaimer in the documentation |
| 13 | +* and/or other materials provided with the distribution. |
| 14 | +* |
| 15 | +* * Neither the name of CosmicMind nor the names of its |
| 16 | +* contributors may be used to endorse or promote products derived from |
| 17 | +* this software without specific prior written permission. |
| 18 | +* |
| 19 | +* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 20 | +* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | +* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 22 | +* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| 23 | +* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | +* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 25 | +* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 26 | +* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 27 | +* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | +* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | +*/ |
30 | 30 |
|
31 | 31 | extension Array where Element: Equatable { |
32 | 32 | /** |
33 | | - Removes a given Element from an Array if it exists. |
34 | | - - Parameter object: An Element. |
35 | | - - Returns: An optional Element if the removed |
36 | | - element exists. |
37 | | - */ |
38 | | - @discardableResult |
39 | | - mutating func remove(object: Element) -> Element? { |
40 | | - return index(of: object).map { self.remove(at: $0) } |
| 33 | + Removes a given Element from an Array if it exists. |
| 34 | + - Parameter object: An Element. |
| 35 | + - Returns: An optional Element if the removed |
| 36 | + element exists. |
| 37 | + */ |
| 38 | + @discardableResult |
| 39 | + mutating func remove(object: Element) -> Element? { |
| 40 | + return index(of: object).map { self.remove(at: $0) } |
41 | 41 | } |
42 | | - |
43 | | - /** |
44 | | - Removes a list of given Elements from an Array if |
45 | | - they exists. |
46 | | - - Parameter objects: A list of Elements. |
47 | | - */ |
| 42 | + |
| 43 | + /** |
| 44 | + Removes a list of given Elements from an Array if |
| 45 | + they exists. |
| 46 | + - Parameter objects: A list of Elements. |
| 47 | + */ |
48 | 48 | mutating func remove(objects: Element...) { |
49 | 49 | remove(objects: objects) |
50 | 50 | } |
51 | | - |
52 | | - /** |
53 | | - Removes an Array of given Elements from an Array if |
54 | | - they exists. |
55 | | - - Parameter objects: An Array of Elements. |
56 | | - */ |
57 | | - mutating func remove(objects: [Element]) { |
58 | | - objects.forEach { |
59 | | - self.remove(object: $0) |
60 | | - } |
| 51 | + |
| 52 | + /** |
| 53 | + Removes an Array of given Elements from an Array if |
| 54 | + they exists. |
| 55 | + - Parameter objects: An Array of Elements. |
| 56 | + */ |
| 57 | + mutating func remove(objects: [Element]) { |
| 58 | + objects.forEach { |
| 59 | + self.remove(object: $0) |
| 60 | + } |
61 | 61 | } |
62 | | - |
63 | | - /** |
64 | | - The total count for the given Elements. |
65 | | - - Parameter of elements: A list of Elements. |
66 | | - - Returns: An Int. |
67 | | - */ |
| 62 | + |
| 63 | + /** |
| 64 | + The total count for the given Elements. |
| 65 | + - Parameter of elements: A list of Elements. |
| 66 | + - Returns: An Int. |
| 67 | + */ |
68 | 68 | public func count(of elements: Element...) -> Int { |
69 | | - return count(of: elements) |
| 69 | + return count(of: elements) |
70 | 70 | } |
71 | | - |
72 | | - /** |
73 | | - The total count for the given Elements. |
74 | | - - Parameter of elements: An Array of Elements. |
75 | | - - Returns: An Int. |
76 | | - */ |
77 | | - public func count(of elements: [Element]) -> Int { |
78 | | - |
| 71 | + |
| 72 | + /** |
| 73 | + The total count for the given Elements. |
| 74 | + - Parameter of elements: An Array of Elements. |
| 75 | + - Returns: An Int. |
| 76 | + */ |
| 77 | + public func count(of elements: [Element]) -> Int { |
| 78 | + |
79 | 79 | var c = 0 |
80 | | - for e in elements { |
81 | | - for x in self where e == x { |
82 | | - c += 1 |
83 | | - } |
84 | | - } |
| 80 | + for e in elements { |
| 81 | + for x in self where e == x { |
| 82 | + c += 1 |
| 83 | + } |
| 84 | + } |
85 | 85 | return c |
86 | 86 | } |
87 | | - |
88 | | - /** |
89 | | - The probability of getting the given Elements. |
90 | | - - Parameter of elements: A list of Elements. |
91 | | - - Returns: A Double. |
92 | | - */ |
93 | | - public func probability(of elements: Element...) -> Double { |
94 | | - return probability(of: elements) |
| 87 | + |
| 88 | + /** |
| 89 | + The probability of getting the given Elements. |
| 90 | + - Parameter of elements: A list of Elements. |
| 91 | + - Returns: A Double. |
| 92 | + */ |
| 93 | + public func probability(of elements: Element...) -> Double { |
| 94 | + return probability(of: elements) |
95 | 95 | } |
96 | | - |
97 | | - /** |
98 | | - The probability of getting the given Elements. |
99 | | - - Parameter of elements: An Array of Elements. |
100 | | - - Returns: A Double. |
101 | | - */ |
102 | | - public func probability(of elements: [Element]) -> Double { |
103 | | - return 0 < count ? Double(count(of: elements)) / Double(count) : 0 |
| 96 | + |
| 97 | + /** |
| 98 | + The probability of getting the given Elements. |
| 99 | + - Parameter of elements: An Array of Elements. |
| 100 | + - Returns: A Double. |
| 101 | + */ |
| 102 | + public func probability(of elements: [Element]) -> Double { |
| 103 | + return 0 < count ? Double(count(of: elements)) / Double(count) : 0 |
104 | 104 | } |
105 | | - |
106 | | - /** |
107 | | - A probability method that uses a block to determine the member state of a condition. |
108 | | - - Parameter of elements: A list of Elements. |
109 | | - - Returns: A Double. |
110 | | - */ |
111 | | - public func probability(execute block: @escaping (Element) -> Bool) -> Double { |
112 | | - guard 0 < count else { |
113 | | - return 0 |
114 | | - } |
115 | | - |
116 | | - var c = 0 |
117 | | - for e in self { |
118 | | - if block(e) { |
119 | | - c += 1 |
120 | | - } |
121 | | - } |
122 | | - |
| 105 | + |
| 106 | + /** |
| 107 | + A probability method that uses a block to determine the member state of a condition. |
| 108 | + - Parameter of elements: A list of Elements. |
| 109 | + - Returns: A Double. |
| 110 | + */ |
| 111 | + public func probability(execute block: @escaping (Element) -> Bool) -> Double { |
| 112 | + guard 0 < count else { |
| 113 | + return 0 |
| 114 | + } |
| 115 | + |
| 116 | + var c = 0 |
| 117 | + for e in self { |
| 118 | + if block(e) { |
| 119 | + c += 1 |
| 120 | + } |
| 121 | + } |
| 122 | + |
123 | 123 | return Double(c) / Double(count) |
124 | 124 | } |
125 | | - |
126 | | - /** |
127 | | - Calculates the expected value of elements based on a given number of trials. |
128 | | - - Parameter trials: Number of trials. |
129 | | - - Parameter elements: A list of Elements. |
130 | | - - Returns: A Double. |
131 | | - */ |
132 | | - public func expectedValue(trials: Int, for elements: Element...) -> Double { |
133 | | - return expectedValue(trials: trials, for: elements) |
| 125 | + |
| 126 | + /** |
| 127 | + Calculates the expected value of elements based on a given number of trials. |
| 128 | + - Parameter trials: Number of trials. |
| 129 | + - Parameter elements: A list of Elements. |
| 130 | + - Returns: A Double. |
| 131 | + */ |
| 132 | + public func expectedValue(trials: Int, for elements: Element...) -> Double { |
| 133 | + return expectedValue(trials: trials, for: elements) |
134 | 134 | } |
135 | | - |
136 | | - /** |
137 | | - Calculates the expected value of elements based on a given number of trials. |
138 | | - - Parameter trials: Number of trials. |
139 | | - - Parameter elements: An Array of Elements. |
140 | | - - Returns: A Double. |
141 | | - */ |
142 | | - public func expectedValue(trials: Int, for elements: [Element]) -> Double { |
143 | | - return Double(trials) * probability(of: elements) |
| 135 | + |
| 136 | + /** |
| 137 | + Calculates the expected value of elements based on a given number of trials. |
| 138 | + - Parameter trials: Number of trials. |
| 139 | + - Parameter elements: An Array of Elements. |
| 140 | + - Returns: A Double. |
| 141 | + */ |
| 142 | + public func expectedValue(trials: Int, for elements: [Element]) -> Double { |
| 143 | + return Double(trials) * probability(of: elements) |
144 | 144 | } |
145 | 145 | } |
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