rename to zero

zero.Core/Extensions/StringExtensions.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Globalization;
+
+namespace zero.Core.Extensions
+{
+  public static class StringExtensions
+  {
+    public static string EnsureStartsWith(this string input, string toStartWith)
+    {
+      if (input.StartsWith(toStartWith)) return input;
+      return toStartWith + input.TrimStart(toStartWith);
+    }
+
+
+    public static string EnsureStartsWith(this string input, char value)
+    {
+      return input.StartsWith(value.ToString(CultureInfo.InvariantCulture)) ? input : value + input;
+    }
+
+
+    public static string EnsureEndsWith(this string input, char value)
+    {
+      return input.EndsWith(value.ToString(CultureInfo.InvariantCulture)) ? input : input + value;
+    }
+
+
+    public static string EnsureEndsWith(this string input, string toEndWith)
+    {
+      return input.EndsWith(toEndWith.ToString(CultureInfo.InvariantCulture)) ? input : input + toEndWith;
+    }
+
+
+    public static string TrimEnd(this string value, string forRemoving)
+    {
+      if (String.IsNullOrEmpty(value)) return value;
+      if (String.IsNullOrEmpty(forRemoving)) return value;
+
+      while (value.EndsWith(forRemoving, StringComparison.InvariantCultureIgnoreCase))
+      {
+        value = value.Remove(value.LastIndexOf(forRemoving, StringComparison.InvariantCultureIgnoreCase));
+      }
+      return value;
+    }
+
+
+    public static string TrimStart(this string value, string forRemoving)
+    {
+      if (String.IsNullOrEmpty(value)) return value;
+      if (String.IsNullOrEmpty(forRemoving)) return value;
+
+      while (value.StartsWith(forRemoving, StringComparison.InvariantCultureIgnoreCase))
+      {
+        value = value.Substring(forRemoving.Length);
+      }
+      return value;
+    }
+
+
+    public static bool HasValue(this string input)
+    {
+      return !String.IsNullOrWhiteSpace(input);
+    }
+
+
+    public static bool IsNullOrEmpty(this string input)
+    {
+      return String.IsNullOrEmpty(input);
+    }
+
+
+    public static bool IsNullOrWhiteSpace(this string input)
+    {
+      return String.IsNullOrWhiteSpace(input);
+    }
+  }
+}