Finding and removing Non-ASCII characters from an Oracle Varchar2
I think this will do the trick: SELECT REGEXP_REPLACE(COLUMN, ‘[^[:print:]]’, ”)
ascii
Detect whether a Python string is a number or a letter [duplicate]
Check if string is nonnegative digit (integer) and alphabet You may use str.isdigit() and str.isalpha() to check whether a given string is a nonnegative integer (0 or greater) and alphabetical character, respectively. Sample Results: # For alphabet >>> ‘A’.isdigit() False >>> ‘A’.isalpha() True # For digit >>> ‘1’.isdigit() True >>> ‘1’.isalpha() False Check for strings … Read more
How to convert a Java String to an ASCII byte array?
Using the getBytes method, giving it the appropriate Charset (or Charset name). Example: String s = “Hello, there.”; byte[] b = s.getBytes(StandardCharsets.US_ASCII); If more control is required (such as throwing an exception when a character outside the 7 bit US-ASCII is encountered) then CharsetDecoder can be used: private static byte[] strictStringToBytes(String s, Charset charset) throws … Read more
How to convert from EBCDIC to ASCII in C#.net
Try this #region public static byte[] ConvertAsciiToEbcdic(byte[] asciiData) public static byte[] ConvertAsciiToEbcdic(byte[] asciiData) { // Create two different encodings. Encoding ascii = Encoding.ASCII; Encoding ebcdic = Encoding.GetEncoding(“IBM037”); //Retutn Ebcdic Data return Encoding.Convert(ascii, ebcdic, asciiData); } #endregion #region public static byte[] ConvertEbcdicToAscii(byte[] ebcdicData) public static byte[] ConvertEbcdicToAscii(byte[] ebcdicData) { // Create two different encodings. Encoding ascii … Read more
Why the ASCII value of a digit character is equal to the value plus ‘0’?
Because the integral values of the digit characters are guaranteed by the C standard to be consecutive. Therefore ‘1’ – ‘0’ == 1, ‘2’ – ‘0’ == 2, etc. from which you can infer that your formulas really do work. Sidenotes: Since this is guaranteed by the standard, it works even if the target platform … Read more
How to convert a string of hex values to a string?
int len = hex.length(); std::string newString; for(int i=0; i< len; i+=2) { std::string byte = hex.substr(i,2); char chr = (char) (int)strtol(byte.c_str(), null, 16); newString.push_back(chr); }
Are the character digits [‘0’..’9′] required to have contiguous numeric values?
Indeed not looked hard enough: In 2.3. Character sets, item 3: In both the source and execution basic character sets, the value of each character after 0 in the above list of decimal digits shall be one greater than the value of the previous. And this is above list of decimal digits: 0 1 2 … Read more
Why is ‘\x’ invalid in Python?
There is a table listing all the escape codes and their meanings in the documentation. Escape Sequence Meaning Notes \xhh Character with hex value hh (4,5) Notes: 4. Unlike in Standard C, exactly two hex digits are required. 5. In a string literal, hexadecimal and octal escapes denote the byte with the given value; it … Read more
Rails 3 invalid multibyte char (US-ASCII)
Instead of adding # coding: UTF-8 try to add # encoding: UTF-8 on the first line of the file. It worked for me. I found the information here : http://groups.google.com/group/sinatrarb/browse_thread/thread/f92529bf0cf62015
How do I get the byte values of a string in PHP?
Use the ord function http://ca.php.net/ord eg. <?php $var = “nÖ§9q1Fª£ˆæÓ§Œ_»—Ló]j”; for($i = 0; $i < strlen($var); $i++) { echo ord($var[$i]).”<br/>”; } ?>