Question

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How do I split a string by strings and include the delimiters using .NET?

I have following code:

string Test="abc * (xyz+ pqr) - 10/100";

char[] delimiters = new char[] { '+', '-', '*', '/', '(', ')' };
string[] parts = Test.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < parts.Length; i++)
{
    Response.Write(parts[i]);
}

I m getting output as:

abc xyz pqr 10100

But i want:

abc
*
(
xyz
+
pqr

…and so on.

(in c# or in javascript)

Answer 1

In JavaScript, you can use capturing groups of a regex:

var test = "abc * (xyz+ pqr) - 10/100";

var regex = /\s*([()*/+-])\s*/;
var parts = test.split(regex);
for (var i = 0; i < parts.length; i++)
    document.writeln(parts[i]);

Yet this does not work in older Internet Explorers, you would need to do it manually there or use this shim. Better, cross-browser solution: Just match variable names and numbers as well, and use match:

var regex = /[()*/+-]|[a-z]+|\d+/g;
var parts = text.match(regex);