2016 Update

Task/URL-encoding/00DESCRIPTION

@@ -1,5 +1,5 @@
-The task is to provide a function or mechanism to convert a provided string
-into URL encoding representation.
+;Task:
+Provide a function or mechanism to convert a provided string into URL encoding representation.
 
 In URL encoding, special characters, control characters and extended characters
 are converted into a percent symbol followed by a two digit hexadecimal code,
@@ -7,28 +7,30 @@ So a space character encodes into %20 within the string.
 
 For the purposes of this task, every character except 0-9, A-Z and a-z requires conversion, so the following characters all require conversion by default:
 
-*ASCII control codes (Character ranges 00-1F hex (0-31 decimal) and 7F (127 decimal).
-*ASCII symbols (Character ranges 32-47 decimal (20-2F hex))
-*ASCII symbols (Character ranges 58-64 decimal (3A-40 hex))
-*ASCII symbols (Character ranges 91-96 decimal (5B-60 hex))
-*ASCII symbols (Character ranges 123-126 decimal (7B-7E hex))
-*Extended characters with character codes of 128 decimal (80 hex) and above.
-
-'''Example'''
+* ASCII control codes (Character ranges 00-1F hex (0-31 decimal) and 7F (127 decimal).
+* ASCII symbols (Character ranges 32-47 decimal (20-2F hex))
+* ASCII symbols (Character ranges 58-64 decimal (3A-40 hex))
+* ASCII symbols (Character ranges 91-96 decimal (5B-60 hex))
+* ASCII symbols (Character ranges 123-126 decimal (7B-7E hex))
+* Extended characters with character codes of 128 decimal (80 hex) and above.
 
+<br>
+;Example:
 The string "<code><nowiki>http://foo bar/</nowiki></code>" would be encoded as "<code><nowiki>http%3A%2F%2Ffoo%20bar%2F</nowiki></code>".
 
-'''Variations'''
 
+;Variations:
 * Lowercase escapes are legal, as in "<code><nowiki>http%3a%2f%2ffoo%20bar%2f</nowiki></code>".
 * Some standards give different rules: RFC 3986, ''Uniform Resource Identifier (URI): Generic Syntax'', section 2.3, says that "-._~" should not be encoded. HTML 5, section [http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#url-encoded-form-data 4.10.22.5 URL-encoded form data], says to preserve "-._*", and to encode space " " to "+". The options below provide for utilization of an exception string, enabling preservation (non encoding) of particular characters to meet specific standards.
 
-'''Options'''
 
+;Options:
 It is permissible to use an exception string (containing a set of symbols
 that do not need to be converted).
 However, this is an optional feature and is not a requirement of this task.
 
-;See also
-[[URL decoding]]
-[[URL parser]]
+
+;Related tasks:
+* &nbsp; [[URL decoding]]
+* &nbsp; [[URL parser]]
+<br><br>

Task/URL-encoding/Elixir/url-encoding.elixir

@@ -1,2 +1,2 @@
-iex(1)> URI.encode("http://foo bar/", &(URI.char_unreserved?/1))
+iex(1)> URI.encode("http://foo bar/", &URI.char_unreserved?/1)
 "http%3A%2F%2Ffoo%20bar%2F"

Task/URL-encoding/REALbasic/url-encoding-2.realbasic

@@ -1,13 +1,21 @@
-Function URLEncode(URL As String, Exceptions As String = "") As String
-  For i As Integer = 0 To 255
-    If InStr(Exceptions, Chr(i)) > 0 Then Continue For i
-    Dim char As String = Chr(127) + Right("00" + Hex(i), 2)
-    URL = ReplaceAll(URL, Chr(i), char)
-    If i = 47 Then i = 57
-    If i = 64 Then i = 90
-    If i = 96 Then i = 122
-    If i = 126 Then i = 128
+Function URLEncode(Data As String, ParamArray Exceptions() As String) As String
+  Dim buf As String
+  For i As Integer = 1 To Data.Len
+    Dim char As String = Data.Mid(i, 1)
+    Select Case Asc(char)
+    Case 48 To 57, 65 To 90, 97 To 122, 45, 46, 95
+      buf = buf + char
+    Else
+      If Exceptions.IndexOf(char) > -1 Then
+        buf = buf + char
+      Else
+        buf = buf + "%" + Left(Hex(Asc(char)) + "00", 2)
+      End If
+    End Select
   Next
-  URL = ReplaceAll(URL, Chr(127), "%")
-  Return URL
+  Return buf
 End Function
+
+ 'usage
+ Dim s As String = URLEncode("http://foo bar/") ' no exceptions
+ Dim t As String = URLEncode("http://foo bar/", "!", "?", ",") ' with exceptions