2 // CollectionExtensions.cs
5 // Marek Safar <marek.safar@gmail.com>
7 // Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 using System.Collections.Generic;
33 namespace System.Net.Http.Headers
35 static class CollectionExtensions
37 public static bool SequenceEqual<TSource> (this List<TSource> first, List<TSource> second)
40 return second == null || second.Count == 0;
43 return first == null || first.Count == 0;
45 return Enumerable.SequenceEqual (first, second);
48 public static void SetValue (this List<NameValueHeaderValue> parameters, string key, string value)
50 for (int i = 0; i < parameters.Count; ++i) {
51 var entry = parameters[i];
52 if (!string.Equals (entry.Name, key, StringComparison.OrdinalIgnoreCase))
56 parameters.RemoveAt (i);
58 parameters[i].Value = value;
64 if (!string.IsNullOrEmpty (value))
65 parameters.Add (new NameValueHeaderValue (key, value));
68 public static string ToString<T> (this List<T> list)
70 if (list == null || list.Count == 0)
73 const string separator = "; ";
75 var sb = new StringBuilder ();
76 for (int i = 0; i < list.Count; ++i) {
77 sb.Append (separator);
81 return sb.ToString ();
84 public static void ToStringBuilder<T> (this List<T> list, StringBuilder sb)
86 if (list == null || list.Count == 0)
89 const string separator = ", ";
91 for (int i = 0; i < list.Count; ++i) {
93 sb.Append (separator);