I need to match with JS:
For example:
23
4545a
1B
554 cs
34-S
Regex is not my strong suit, so all I've got is this...
^[0-9A-Za-z ]+$
UPDATED:
^(0-9A-Za-z )+$
A little verbose perhaps but demonstrates the required parts I think
[0-9]+[\s-]{0,1}[a-zA-Z]{0,2}
Equates to:
This regex matches each of your test scenarios.
Aaaaand, mine is a hybrid of the other answers. :)
/^\\d+[ -]?[az]{0,2}$/i
\\d+
= 1 or more digits [ -]?
= an optional space character (note: space only, not "whitespace") or dash [az]{0,2}
= 1 or 2 alpha characters (note: lowercase only at the moment, but keep reading . . .) i
at the end of the pattern makes it case insensitive, so the [az]
will match upper or lower-case alphas EDIT - Okay, so I found an error in all of our answers. LOL Because the alpha pattern allow 0 characters at the end and the space and dash are optional, the regexes that we've provided so far result in a false positive for the following test data: 123-
and 456 <--- with a space at the end
The second one could be resolved by using $.trim()
on the value (if that is allowed for what you are trying to test), but the first one can't.
So . . . that brings us to a new regex to handle those situations:
/^\d+([ -]?[a-z]{1,2})?$/i
\\d+
= 1 or more digits [ -]?
= an optional space character (note: space only, not "whitespace") or dash [az]{1,2}
= must have 1 or 2 alpha characters (note: lowercase only at the moment, but keep reading . . .) ( . . . )?
around those last two patterns enforces that the space or dash is only valid after the numbers, IF they are, then, followed by the 1 or 2 letters . . . however, that entire group is optional, as a whole. i
at the end of the pattern makes it case insensitive, so the [az]
will match upper or lower-case alphas They updated regex matches all of the examples and fails on the two invalid cases that I mentioned, as well.
Note: If numbers followed by just a space should be considered valid, trimming the value before you test it will allow that case to pass as well.
会做吗?
^[0-9]+( |-)?[A-Za-z]{0,2}$
(^[0-9]+( |-){0,1}[a-zA-Z]{0,2})
您可以在http://gskinner.com/RegExr/中进行测试,这是测试和了解RegEx的非常有用的工具
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.