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Finding repeating words in a document

Q

How to find repeating words in a text document with a regular expression?

An example text document is listed below:

✍: FYIcenter.com

A

The regular expression to find repeating words in a text document can be written as: Note that: 

\b(\w+)      - identifies a word
\s+(\g1)\b   - the same word repeated again using backreference

Click the button to test this regular expression here online:

2013-02-03, 0👍, 0💬

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