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grep '\([0-9]\) *\1'
Takes a digit ([0-9]), remembers it (\...\), looks for zero or more spaces ( *) followed by a repeat of the stored digit (\1).
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'Grep' - B
You are viewing a single comment's thread. Return to all comments →
grep '\([0-9]\) *\1'Takes a digit ([0-9]), remembers it (\...\), looks for zero or more spaces ( *) followed by a repeat of the stored digit (\1).