blob: 066e7e910caab249131c56a82a9e887197ea965a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
using System;
using System.Collections.Generic;
namespace Xamarin.Forms
{
internal static class EnumerableExtensions
{
public static IEnumerable<T> GetGesturesFor<T>(this IEnumerable<IGestureRecognizer> gestures, Func<T, bool> predicate = null) where T : GestureRecognizer
{
if (gestures == null)
yield break;
if (predicate == null)
predicate = x => true;
foreach (IGestureRecognizer item in gestures)
{
var gesture = item as T;
if (gesture != null && predicate(gesture))
{
yield return gesture;
}
}
}
internal static IEnumerable<T> Append<T>(this IEnumerable<T> enumerable, T item)
{
foreach (T x in enumerable)
yield return x;
yield return item;
}
internal static void ForEach<T>(this IEnumerable<T> enumeration, Action<T> action)
{
foreach (T item in enumeration)
{
action(item);
}
}
internal static int IndexOf<T>(this IEnumerable<T> enumerable, T item)
{
if (enumerable == null)
throw new ArgumentNullException("enumerable");
var i = 0;
foreach (T element in enumerable)
{
if (Equals(element, item))
return i;
i++;
}
return -1;
}
internal static int IndexOf<T>(this IEnumerable<T> enumerable, Func<T, bool> predicate)
{
var i = 0;
foreach (T element in enumerable)
{
if (predicate(element))
return i;
i++;
}
return -1;
}
internal static IEnumerable<T> Prepend<T>(this IEnumerable<T> enumerable, T item)
{
yield return item;
foreach (T x in enumerable)
yield return x;
}
}
}
|