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Looking for fast/efficient ways to convert an alphanumeric to a number only string
e.g. +123-456/7890 becomes 1234567890 etc.
the existing code is
foreach(char c in str.ToCharArray() )
if ( char.IsDigit(c) ) stringBuilder.Append(c);
return stringBuilder.ToString();
614
In computing, the standard alphanumeric codes, such as ASCII, may contain not only ordinary letters and numerals but also punctuation marks and math symbols.
Alphanumeric, also referred to as alphameric, is a term that encompasses all of the letters and numerals in a given language set. In layouts designed for English language users, alphanumeric characters are those comprised of the combined set of the 26 alphabetic characters, A to Z, and the 10 Arabic numerals, 0 to 9.
To remove all non-alphanumeric characters from a string, call the replace() method, passing it a regular expression that matches all non-alphanumeric characters as the first parameter and an empty string as the second. The replace method returns a new string with all matches replaced. Copied!
LINQ Solution:
return new string(str.Where(char.IsDigit).ToArray());
Not sure if it's more efficient; at-least it's not regex!
92
string str="+123-456/7890";
long onlyNumbers= Convert.ToInt64(Regex.Replace(str, @"\D", ""));
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