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. |