wasSharp – Blame information for rev 29
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
11 | office | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 // |
||
3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
||
4 | // rights of fair usage, the disclaimer and warranty conditions. // |
||
5 | /////////////////////////////////////////////////////////////////////////// |
||
6 | |||
7 | using System; |
||
8 | using System.Collections.Generic; |
||
9 | using System.Linq; |
||
10 | |||
11 | namespace wasSharp.Linq |
||
12 | { |
||
13 | public static class Extensions |
||
14 | { |
||
15 | /////////////////////////////////////////////////////////////////////////// |
||
16 | // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 // |
||
17 | /////////////////////////////////////////////////////////////////////////// |
||
18 | /// <summary> |
||
19 | /// Returns true of an enumerable contains more than one element. |
||
20 | /// </summary> |
||
21 | /// <typeparam name="T">the type of the enumeration</typeparam> |
||
22 | /// <param name="e">the enumeration</param> |
||
23 | /// <returns>true if enumeration contains more than one element</returns> |
||
24 | /// <remarks>O(2) worst case</remarks> |
||
25 | public static bool Some<T>(this IEnumerable<T> e) |
||
26 | { |
||
27 | var i = 0; |
||
28 | using (var iter = e.GetEnumerator()) |
||
29 | { |
||
30 | while (iter.MoveNext()) |
||
31 | { |
||
32 | if (++i > 1) |
||
33 | return true; |
||
34 | } |
||
35 | return false; |
||
36 | } |
||
37 | } |
||
38 | |||
39 | /// <summary> |
||
29 | office | 40 | /// Sequentially removes all the elements from the first sequence that are in the second sequence |
41 | /// or all the elements from the second sequence that are in the first sequence. |
||
11 | office | 42 | /// </summary> |
43 | /// <typeparam name="T">the type o the collection</typeparam> |
||
44 | /// <param name="o">the first sequence to remove from</param> |
||
45 | /// <param name="p">the second sequence to remove</param> |
||
29 | office | 46 | /// <returns>the first sequence excluding the second sequence or the second sequence excluding the first sequence</returns> |
47 | public static IEnumerable<T> SequenceExceptAny<T>(this IEnumerable<T> o, IEnumerable<T> p) where T : IEquatable<T> |
||
11 | office | 48 | { |
49 | var l = new List<T>(o); |
||
50 | var r = new List<T>(p); |
||
51 | return l.Count > r.Count |
||
52 | ? l.Zip(r, (x, y) => x.Equals(y) ? default(T) : y) |
||
53 | .Concat(l.Skip(r.Count())) |
||
54 | .Where(q => q != null && !q.Equals(default(T))) |
||
55 | : r.Zip(l, (x, y) => x.Equals(y) ? default(T) : y) |
||
56 | .Concat(r.Skip(l.Count())) |
||
57 | .Where(q => q != null && !q.Equals(default(T))); |
||
58 | } |
||
29 | office | 59 | |
60 | /// <summary> |
||
61 | /// Sequentially removes all the elements from the first sequence that are in the second sequence. |
||
62 | /// </summary> |
||
63 | /// <typeparam name="T">the type o the collection</typeparam> |
||
64 | /// <param name="o">the first sequence to remove from</param> |
||
65 | /// <param name="p">the second sequence to remove</param> |
||
66 | /// <returns>the first sequence excluding the second sequence</returns> |
||
67 | public static IEnumerable<T> SequenceExcept<T>(this IEnumerable<T> a, IEnumerable<T> b) where T : IEquatable<T> |
||
68 | { |
||
69 | var ea = a.GetEnumerator(); |
||
70 | var eb = b.GetEnumerator(); |
||
71 | while (ea.MoveNext()) |
||
72 | { |
||
73 | if (eb.MoveNext() && ea.Current.Equals(eb.Current)) |
||
74 | continue; |
||
75 | yield return ea.Current; |
||
76 | } |
||
77 | } |
||
11 | office | 78 | } |
27 | office | 79 | } |