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I'm having difficulty catching some strings. I want a regex to catch the strings in this list:
1
2
3
4
5
6
7
8a
8b
8c
8d
9
There will only be a letter after the number 8, and 8 will always have a following letter (a-d). The rest of the numbers will not have a letter following them.
Thanks
You can use:
[1-7]|9|8[abcd]
Depending on whether you want the whole string to match, so that nothing else follows or precedes the match, you may need to add anchors:
^([1-7]|9|8[abcd])$
Or, alternatively, if you just want to match digits that are not followed by a letter (a, b, c, d) except when it is 8 (where it is required), then:
([1-7]|9)(?![abcd])|8[abcd]
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The following regex code; after the number, it detects the period, but not if there is a space between the number and the text.
(\d+|d+\s)\.\s*([0-9a-zA-Z].*?)\s+([0-9a-zA-Z]\..*?)(?=\d+\.\s*[0-9a-zA-Z]|$)
Test this is first string and random digits:15*893 A.TEST B. TEST2 52.Test this is second string A.TEST B. TEST2 53 . This is 3th string A.TEST B. TEST2 54. this is next string.. A.TEST B. TEST2
Part 53 does not detect. What is the reason of this?
https://regex101.com/r/MqBcB6/2
You just need to allow for spaces between the digits and . where you check for them (at the start of the regex and in the lookahead):
(\d+)\s*\.\s*([0-9a-zA-Z].*?)\s+([0-9a-zA-Z]\..*?)(?=\d+\s*\.\s*[0-9a-zA-Z]|$)
Demo on regex101
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Can someone tell me how to allow in Regex all a-zA-Z0-9 except 6 digits long number?
So true for:
1234567
a123456
123456P
3A237bdb8
but false for
123456
I want to
allow only letters and digits
deny 6 digit long number (like 123456) and other not letter characters like -_+,.!##$ etc.
If your regex engine supports lookahead, you can use:
^(?!\d{6}$)[a-zA-Z0-9]+$
Demo
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Let a and b be digits. The problem is easily solved if a=b, I can test the sign/no sign and then proceed to match the range of numbers from 0-a. I don't know how to solve this when the numbers are unequal.
How can I do it in python using a regular expression?
If you want for example between -7 and 4 :
(-[1-7]|[0-4])
Here is an example : https://regex101.com/r/8TnSVn/1
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I want a regex to match cost.
Valid cost-
1.1234455
12.434343
123.3333
..
upto 10 digits maximum..
and invalid is
0.545454
000.5435435
Here is a regex that will match any cost except those that have all zeros before the floating point
(?!0+\.)\d+\.\d+
http://regex101.com/r/pQ4kB3
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I want to set up a rule for a string:
8 chars
first 4 is alphabet, case insensitive.
last 4 is number
how to write a regular expression for this case?
^[a-zA-Z]{4}\d{4}$
Explanation:
^ start of string
[a-zA-Z] the characters a to z and A to Z
{4} repeat the list item 4 times
\d a digit character
{4} repeat the list item 4 times
$ end of string