Using Regular Expressions To Find And Replace Text

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Examples of using regular expressions within a text editor to find, find and replace, and find, capture, and replace text within a data file. Second video of a pair that introduce the use of regular expressions (regex).
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Nice examples. I think the replacement at 6:00 to 6:13 ought also have parentheses and $1 though. As it is, the last digit is lost in the replacement, leading to (line 1) 56 -> 5_reads, (line 3) 340 -> 34_reads, (line 5) 1 -> _reads, etc., which is not what I think was intended.

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