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Match strings with Match_Pattern

Match pattern is a function in validation transform. It is used to match the input strings. This function can be used to compare alphabets (a-z, A-Z), numbers (0-9) and special characters.

Match_pattern cannot be used to match sub-strings.

Syntax

match_pattern(input_string,pattern_string)

Here,

input_string is the string to be matched. It could be alphabets, numbers, etc.

pattern_string is the pattern that you want to find in the whole string.

Return value

The return value for this function is 0 or 1.

If the return value is 1 then the input string matches.

If the return value is 0 then the input string does not match.

The below table shows the examples with patterns:

Pattern with examples

Use

Result

  print(match_pattern(‘Janani’, ‘Xxxxxx’));

x – Used for lowercase alphabets.

Return value:1

  print(match_pattern(‘JANANI’, ‘Xxxxxx’));

  print(match_pattern(‘JANANI’, ‘XXXXXX’));

X – Used for uppercase letters.

Return value: 0

Return value:1

  print(Match_pattern(‘Jeni Krish’, ‘Xxxx Xxxxx’));

Return value:1

print(Match_pattern(123,999));

9 – Used for numbers

Return value:1

print(match_pattern(‘jeni4′,’jeni[!\3]’));

print(match_pattern(‘jeni3′,’jeni[!\3]’));

\  – Escape character. It is used to avoid a number specifically.

Return value:1 since number 3 is not found in the string.

Return value: 0 since number 3 is found in the string.

print(match_pattern(‘janani’,’*’));

*- Used for characters appearing 0 or more times.

Return value:1

print(match_pattern(‘a1′,’a?’));

print(match_pattern(‘a1sdf’,’a?’));

? — Characters occurring one and only once

Return value: 1 since after the character a only one character should appear.

Return value: 0 since after the character a many characters appear.

print(match_pattern(‘a1′,’a[123]’));

print(match_pattern(‘a4′,’a[123]’));

[ ]– Characters occurring inside the braces only one time.

Return value: 1 since character 1 is in the list of pattern string.

Return value: 0 since character 4 is not in the list of pattern string.

print(match_pattern(‘Akash’ , ‘[!A]’ ));

[!]–Any character but not the characters that appears after the exclamation point.

Eg: (i.e. [!AB] can allow any, say Name, that does not start with a A or B.

Return value: 0 since string starting with alphabet A should be avoided.

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      8 Comments
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      Author's profile photo Titto Antony
      Titto Antony

      Informative....

      Author's profile photo Former Member
      Former Member

      Nice but worth saying match_regex() is much more powerful!

      Author's profile photo Former Member
      Former Member

      match_regex() is basically the same function but whereas match_pattern() returns a 1 or a 0, match_regex() returns the matched value. Both have their place and are both helpful. match_pattern() would probably be better used in validation.

      Author's profile photo Former Member
      Former Member

      I think you will find that, unlike many other languages, match_regex() also returns an integer 0 / 1 indicating failure / success. One thing to note is that match_regex() matches against the whole string not just any location in the string, it is as if it wraps the ^ and $ anchors around the input regular expression.

      Author's profile photo Former Member
      Former Member

      Yup, my bad. Agreed, match_regex() is much more powerful. Anything where you can use regular expressions over basic searches is preferable in my opinion.

      Author's profile photo Former Member
      Former Member

      Helpful...Thank You..... Keep writing..

      Author's profile photo Former Member
      Former Member

      very helpful..

      Author's profile photo Moritz Opitz
      Moritz Opitz

      Hi guys, I got one question:

      I want to check, if an input stringĀ  has a 'P' as 4. character. Is there a way to do it with match pattern?

      I.e. something like:

      match_pattern('AFZPK7190K', [A-Z][A-Z][A-Z][P][A-Z][A-Z][0-9][0-9][0-9][0-9][A-Z])

      Thanks