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Regular expressions: Difference between revisions
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<br><br>It is also possible to emulate regular expressions through appropriate coding techniques.
<br><br>All of the following REXX examples are modeled after the '''PERL''' examples.
<br>
'''testing'''
<lang rexx>/*REXX program demonstrates testing (modeled after Perl example).*/
$string = "I am a string"
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It does not contain the word: ring
</pre>
'''substitution (destructive)'''
<lang rexx>/*REXX program demonstrates substitution (modeled after Perl example).*/
$string = "I am a string"
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The changed string is: I am another string
</pre>
'''substitution (non-destructive)'''
<lang rexx>/*REXX program shows non-destructive sub. (modeled after Perl example).*/
$string = "I am a string"
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The changed string is: I am another string
</pre>
'''test and substitute'''
<lang rexx>/*REXX program shows test and substitute (modeled after Perl example).*/
$string = "I am a string"
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