How to filter duplicate information in notepad

To filter duplicate information in Notepad, follow these steps: Use regular expressions to find duplicate rows. Select duplicate rows. Find unique rows using regular expressions. Copy only row. Paste the unique row in the new document.

How to filter duplicate information in Notepad

To filter duplicate information in Notepad, you can use the following steps:

Step 1: Use regular expressions

1. Open Notepad and click "Edit"->"Find" on the menu bar.
2. In the Find box, enter (.*)\n\1 (without the quotes).
3. Check the "Regular Expression" checkbox.

Step 2: Find duplicate rows

1. Click "Find Next".
2. Repeat this operation until Notepad cannot find any more duplicate rows.

Step 3: Select Duplicate Lines

1. Press the Ctrl A key to select all text.
2. Press the Ctrl F key to open the Find dialog box and enter the regular expression (.*)\n\1 (without quotation marks).
3. Check the "Select" checkbox.

Step 4: Copy the unique row

1. Click "Find Next".
2. Repeat this operation until Notepad cannot find any more duplicate rows.
3. Press the Ctrl C key to copy the only line.

Step 5: Paste into a new document

1. Open a new Notepad document.
2. Press Ctrl V key to paste the unique row.

Tips:

• Regular expression(.*)\n\1 Find duplicate lines where .* matches any sequence of characters, \n matches a newline character, and \1 refers to the first matching group.

• You can use other regular expressions to match different repeating patterns, for example:

  • Find repeating lines starting with a specific string: ^(.* )\n\1
  • Find duplicate lines containing a specific word: .*\b(word)\b.*\n\1
• You can also use other text editors such as Notepad, which provides more advanced search and replace functions.

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