character

问题 Is "EF BF BF" an allowed character in XML (UTF-8)? <?xml version="1.0" encoding="UTF-8" ?> <XML> <DOCUMENT> <CONTENT>" "</CONTENT> </DOCUMENT> </XML> 回答1: If "EF BF BF" is a typo, and you meant "EF BB BF": Yes, if it is the first bytes. They are the "BOM", Byte Order Mark, used to identify the endianness of the file. For UTF-16 and UTF-32-encoded files this is mandatory. For UTF-8, this is optional. Some systems might be confused by it if it is present, and it might give unexpected behavior

问题 I have a problem. I want to change the black diamond question mark (U-FFFD) with white space. How could I search the character (black diamond question mark) so I can change it with white space? Thank you for your attention. 回答1: [theString stringByReplacingOccurrencesOfString:@"\ufffd" withString:@" "]; 回答2: Solve black diamond with question mark. just use this: foreach($disp as $objs) { $objs = preg_replace( '|[^.?,A-Za-z0-9-]+|', ' ', $objs); echo $objs; } // this will display character (.

问题 I am new to C++. And I am developing a just simple dll. I have to C++ function from C# with a file location information which should be string. And C++ returns some string to C#. Here are my codes.. extern "C" __declspec(dllexport) const char* ParseData(char *filePath) { string _retValue(filePath); printf(_retValue.c_str()); //--> this prints ok return _retValue.c_str(); } [DllImport("D:\\Temp\\chelper.dll", CallingConvention = CallingConvention.Cdecl)] private static extern IntPtr ParseData

问题 I am busy working on past exam papers in preparation for my vb.net exam next week. The question I am struggling with is as follows. Take in a long string of alphabetical characters and special characters extract the alphabetical characters to string1 and extract special characters to string2 so the string hello://thisismystring!? must be displayed as follows string1 = hellothisismystring string2 = ://!? My question is this how do I extract characters from a string and store them in a variable

问题 I'm re-designing a Web site and I have a problem with the existing data base: The database collate is set to utf8_unicode_ci and in the table row I'm calling the collate seems to be set to latin1_swedish_ci the characters store in it are Japanese (but even in phpmyadmin) you see other characters (I guess because of the latin1_swedish_ci). When I print the result from the query I get a bunch of ??? now using mysql_query('SET NAMES utf8'); mysql_set_charset('utf8',$conn); Will output 2009â€N10Å

问题 This question already has answers here : Swift: Check String if it has an element in an Array (2 answers) Closed 4 years ago . How do I check if a specific string: String contains a certain character: Character ? 回答1: string.characters.contains(character) Example: let string = "Hello, World!" let character: Character = "e" if string.characters.contains(character) { print("\(string) contains \(character).") } else { print("\(string) doesn't contain \(character).") } 回答2: let char: Character =

问题 I fetch the data from site into NSString like this: <td><font color=#ffffff>35</td> <td><font color=#ffffff>0</td> <td><font color=#ffffff>0</td> <td><font color=#ffffff>0</td> <td><font color=#ffffff>1</td> <td><font color=#ffffff>2</td> <td><font color=#ffffff>0</td> <td><font color=#ffffff>1</td> <td><font color=#ffffff>16</td> <td><font color=#ffffff>45.2</td> <td><font color=#ffffff>3.153</td> and I want to convert into NSArray with numbers only. I have been tried many classed and

问题 Ive been trying to do this, so the textbox only accepts letters, but the validation does not work. Even when I enter numbers it processes it and shows the first lblError of "Thankyou for your details", where it should actually be "Enter A Valid Name ". is their are validation test similar to IsNumeric for this type of problem? plz help Dim MyName As String If txtMyName.Text Then MyName = txtMyName.Text lblError.Text = "Thankyou for your details" Else lblError.Text = "Enter A Valid Name " End

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . What would be the right way to find the location of a character within the alphabet? For example: "A".find_score # => 1 "C".find_score # => 3 回答1: "A".ord returns 65, the numeric code for "A", which is what the alphabet starts at. If you want it to start at 1 you could just

问题 In Java, why does Character.toString((char) 65533) print out this symbol: � ? I have a Java program which prints these characters all over the place. Its a big program. Any ideas on what I can do to avoid this? 回答1: One of the most likely scenarios is that you are trying to read ISO-8859 data using the UTF-8 character set. If you come across a sequence of characters that is not valid UTF-8, then it will be replaced with the � symbol. Check your input streams, and ensure that you read them