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I am trying to write a regex template that matches all the strings that doesn't contain a certain template.
E.g.:
Matches:
This is my friend. He is very nice.
in
This is my friend. He is very nice.
but doesn't match anything in :
This is my friend John Michaels Fredrickson. He is very nice.
Because it contains something like this: ([A-Z][a-z]+\s?){3}
You can use negative lookahead:
^(?!.*?([A-Z][a-z]+\W){3}).*$
RegEx Demo
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I am trying to create a validation expression for a table name in the format of:
Name_TableName_YYYYMMDD
right now I have something like this:
^[a-zA-Z0-9][^_]+[a-zA-Z0-9][^_]+\d{8}
Number at the end can read 8 digits.
You could try this (very basic) expression
[a-zA-Z]+_[a-zA-Z]+_[0-9]{4}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])
Link to a test
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We have for egz. 4.7(8+3) how add multiple character between digit and bracket4.7*(8+3)
Capture digit followed by bracket into two groups, then replace matched value with group values and multiple character between them:
Regex.Replace(input, #"(\d)(\()", "$1*$2")
For input "4.7(5+(8+3)/1(1-2))" result will be "4.7*(5+(8+3)/1*(1-2))"
Keep it simple: REplace ( by *(
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I need to allow specific characters in my textbox but not range of letters only those ( T, A, G, C ).. the problem is I can't find the regular expression pattern for that.
I think you can make it just with /[TAGC]/g.
I strongly recommend you to check out this site, you can test every regular expression you need there:
RegExr
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The text is in Hebrew, and contains email addresses within the sentences (meaning that the char '.' may indicate not only an end of a sentence but also an email address) I want to split the text into sentences. How can I do it? With what regex pattern?
Like so: ((([^\.]|\.\S)+[\.\!\?])\s+)
Each capture at the top level will be a sentence on the assumption that a period followed by a non-space character is part of an email.
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Usernames Yes/No
“6789” Yes
“33333333_TL” No
“34567890-Shhh” No
“123456-Hero” Yes
“1234567” Yes
“New12345678” No
“87456773kk” No
“1234567890” No
See Regex to check for 4 consecutive numbers.
First check if your string's length >= 8 and then use a regex to look for N consecutive digits and if it finds a fit - your validation fails. Something like - /[^\d]\d{8}[^\d]/