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Status Released
Workspace Natural for z/OS
Categories Natural (NAT) Programing Syntax (Cross platforms)
Created by Philippe Van Coppenolle
Created on Feb 14, 2024

RELATED IDEAS

Functions SEARCH and VERIFY

PL/1 offers three similar functions for looking in strings:

  • INDEX, which resembles our EXAMINE ... FOR ... POSITION IN ....

  • SEARCH, which returns the position of the first matching character of a given set in a target string

  • VERIFY, which returns the position of the first character in a target string which is NOT part of a given set.

You can compare SEARCH with strstr().

VERIFY is more or less the opposite of SEARCH: it returns the position of the first foreign character.

AHA.TEST2141.20...
AHA.TEST2142.20...
AHA.FAVERIFY.20...
AHA.FBSEARCH.20...
AHA.FASEARCH.20...
AHA.FUSEARCH.20...
AHA.FUVERIFY.20...
AHA.FBVERIFY.20...
AHA.TEST2143.20...
AHA.TEST2141.2024-02-16.135402.nap
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AHA.TEST2142.2024-02-16.135402.nap
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AHA.FAVERIFY.2024-02-16.135402.na7
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AHA.FBSEARCH.2024-02-16.135402.na7
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AHA.FASEARCH.2024-02-16.135402.na7
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AHA.FUSEARCH.2024-02-16.135402.na7
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AHA.FUVERIFY.2024-02-16.135402.na7
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AHA.FBVERIFY.2024-02-16.135402.na7
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AHA.TEST2143.2024-02-16.135402.nap
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AHA.TEST2141.2024-02-16.135402.nap AHA.TEST2142.2024-02-16.135402.nap AHA.FAVERIFY.2024-02-16.135402.na7 AHA.FBSEARCH.2024-02-16.135402.na7 AHA.FASEARCH.2024-02-16.135402.na7 AHA.FUSEARCH.2024-02-16.135402.na7 AHA.FUVERIFY.2024-02-16.135402.na7 AHA.FBVERIFY.2024-02-16.135402.na7 AHA.TEST2143.2024-02-16.135402.nap
Use Case Any kind of string manipulation where search or verification is needed, e.g. search the first digit.
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