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77 lines
1.4 KiB
77 lines
1.4 KiB
4 years ago
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The grep understands three different types of regular expression syntax as follows:
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- basic (BRE)
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- extended (ERE)
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- perl (PCRE)
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Examples
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The dot (.) matches any single character. You can match specific characters and character ranges using [..] syntax.
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[source,sh]
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----
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grep "Jordan" $LLO_DATAFILE | grep "\,199.\,M"
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----
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INFO: You can escape the dot (.) by preceding it with a \ (backslash)
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Say you want to Match both ‘Jordan’ or ‘jordan’:
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[source,sh]
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----
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grep '[Jj]ordan' $LLO_DATAFILE
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----
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OR
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[source,sh]
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----
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grep '[Jj][oO][rR][dD][aA][nN]' $LLO_DATAFILE
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----
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[source,sh]
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----
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grep '\<b.t\>' $LLO_DATAFILE
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----
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Where,
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- \< Match the empty string at the beginning of word
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- \> Match the empty string at the end of word.
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Do *OR* with grep
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[source,sh]
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----
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grep -E 'Michael Jordan|Eddie Jordan' $LLO_DATAFILE
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----
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Do *AND* with grep
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[source,sh]
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----
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grep '199[0-9]' $LLO_DATAFILE | grep -E "Kukoc|Jordan"
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----
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[INFO]
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====
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DATAFILE
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The datafile contains aggregate individual statistics for 67 NBA seasons. from basic box-score attributes such as points, assists, rebounds etc., to more advanced money-ball like features such as Value Over Replacement.
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Take a look in
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link:https://git.swarmlab.io:3000/llo/LabLearningObject/src/branch/master/data/nba_statistics_glossary[Glossary^]
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for a detailed column description
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ENVIRONMENT VARIABLE: LLO_DATAFILE
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====
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