Difference between revisions of "Regular expressions"

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Find everything up to a tab
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:<pre>[^\t]+</pre>
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Find capital letter, period, space, capital letter, period.
 
Find capital letter, period, space, capital letter, period.
 
:<pre>([A-Z]\.)[ ]([A-Z]\.)</pre>
 
:<pre>([A-Z]\.)[ ]([A-Z]\.)</pre>
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</pre>
 
</pre>
  
find period, capital lettere at the end of a line
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find period, capital letter at the end of a line
 
:<pre> (\.[[:upper:]])\n </pre>
 
:<pre> (\.[[:upper:]])\n </pre>
  
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find lowercase characters one-at-a-time
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: <pre>([a-z])</pre>
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<pre>
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\s\(([0-9]{4})
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\s[[:upper:]]+\r
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\L\1\n -- lowercases everything
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\L2\1\n -- inserts 2, space, lowercase of the string
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\L$2\1\n -- does not insert 2, lowercases string
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\U\L\1\n -- lowercases everything
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</pre>
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find ch.vv and change it to ch:vv:
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<pre>
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^([0-9]+^).^([0-9]+^) = find things like 23.16
  
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^1:^2 = change the period into a colon 23:16
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</pre>
 
== Links ==
 
== Links ==
  
 
* [https://www.tutorialspoint.com/perl/perl_regular_expressions.htm Perl Regular Expressions]
 
* [https://www.tutorialspoint.com/perl/perl_regular_expressions.htm Perl Regular Expressions]

Latest revision as of 16:44, 26 May 2019

Find everything up to a tab

[^\t]+

Find capital letter, period, space, capital letter, period.

([A-Z]\.)[ ]([A-Z]\.)

Kill the space by using this for the replacement field:

$1$2

Perl: find uppercase words.

 \b[[:upper:]]{2,}\b

find capital letter at the end of a line, insert period before newline

(\s[[:upper:]])\n

\1\.^p

find period, capital letter at the end of a line

 (\.[[:upper:]])\n 

find lowercase characters one-at-a-time

([a-z])
\s\(([0-9]{4})

\s[[:upper:]]+\r

\L\1\n -- lowercases everything

\L2\1\n -- inserts 2, space, lowercase of the string

\L$2\1\n -- does not insert 2, lowercases string

\U\L\1\n -- lowercases everything

find ch.vv and change it to ch:vv:

^([0-9]+^).^([0-9]+^) = find things like 23.16

^1:^2 = change the period into a colon 23:16

Links