正则表达式用MS Word中的另一个字符串替换字符串？

Question

Can anyone help me with a regex to turn:

filename_author

to

author_filename

I am using MS Word 2003 and am trying to do this with Word's Find-and-Replace. I've tried the use wildcards feature but haven't had any luck.

Am I only going to be able to do it programmatically?

Answer 1

Here is the regex:

([^_]*)_(.*)

And here is a C# example:

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        String test = "filename_author";
        String result = Regex.Replace(test, @"([^_]*)_(.*)", "$2_$1");
    }
}

Here is a Python example:

from re import sub

test = "filename_author";
result = sub('([^_]*)_(.*)', r'\2_\1', test)

---

Edit: In order to do this in Microsoft Word using wildcards use this as a search string:

(<*>)_(<*>)

and replace with this:

\\2_\\1

Also, please see Add power to Word searches with regular expressions for an explanation of the syntax I have used above:

• The asterisk (*) returns all the text in the word.
• The less than and greater than symbols (< >) mark the start and end of each word, respectively. They ensure that the search returns a single word.
• The parentheses and the space between them divide the words into distinct groups: (first word) (second word). The parentheses also indicate the order in which you want search to evaluate each expression.

Answer 2

Here you go:

s/^([a-zA-Z]+)_([a-zA-Z]+)$/\2_\1/

Depending on the context, that might be a little greedy.

Answer 3

Search pattern:

([^_]+)_(.+)

Replacement pattern:

$2_$1

Answer 4

In .NET you could use ([^_]+)_([^_]+) as the regex and then $2_$1 as the substitution pattern, for this very specific type of case. If you need more than 2 parts it gets a lot more complicated.

Answer 5

Since you're in MS Word, you might try a non-programming approach. Highlight all of the text, select Table -> Convert -> Text to Table. Set the number of columns at 2. Choose Separate Text At, select the Other radio, and enter an _. That will give you a table. Switch the two columns. Then convert the table back to text using the _ again.

Or you could copy the whole thing to Excel, construct a formula to split and rejoin the text and then copy and paste that back to Word. Either would work.

Answer 6

In C# you could also do something like this.

string[] parts = "filename_author".Split('_');
return parts[1] + "_" + parts[0];

You asked about regex of course, but this might be a good alternative.