- Regular expression for matching HH:MM time format
Here's what I have, and it works: ^[0-2][0-3]:[0-5][0-9]$ This matches everything from 00:00 to 23:59 However, I want to change it so 0:00 and 1:00, etc are also matched as well as 00:00 and 01:30 I e to make the leftmost digit optional, to match HH:MM as well as H:MM Any ideas how to make that change? I need this to work in javascript as
- Invalid regular expression: ^ [+]? [0-9] {0,1} [-. ]?\ (? ( [0-9] {3 . . .
You have two left brackets but one right bracket Your conditional isn't closed
- Regular expressions: What is the difference between `[0-9]{1,2}` and . . .
That means that ^[0-9]{1,2}$ is a string that consists of exactly one or two digits and nothing else, while [0-9]{1,2} is a string of any size containing one or two consecutive digits in it anywhere So the first will match 1, 77, 96, 42 and so on
- What does this regular expression mean ^[a-z]{1}[a-z0-9_]{3,13}$
0 It matches a string starting with a-z followed by 3 to 13 characters from the character set a-z, 0-9 or _ There are a number of online tools that will explain elaborate the meaning of a regular expression as well as test them
- RegEx review for ^([2-8])(\\. [0-9]{1,3})?|(^[9])(\\. [0-9]{1,1})?$
^([2-8])(\ [0-9]{1,3})?|(^[9])(\ [0-9]{1,1})?$ The requirement is to validate: Numbers between 2 to 9 9 inlcusive All numbers in this range can have up to 3 decimal places EXCEPT 9 9 9 899, 9 900 is acceptable BUT 9 910 is NOT The regex I have specified does not work properly for all numbers in range 9 XXX I need help to fix this regex for 9
- why this regex ^ (0 [1-9]|1 [0-9]|2 [0-9]|3 [01]) (0 [1-9]|1 [012 . . .
To make sure that all the parts of this regular expression are working or not i tried its all three parts like ^(0[1-9]|1[0-9]|2[0-9]|3[01])$ , ^(0[1-9]|1[012])$ and ^(19[0-9]{2}|20[0-1][0-7])$ on different sets of days months and years but i found that these are working fine but when i ran it combined i got same unexpected result for date like
- Regex for time in hh:mm am pm format - Stack Overflow
How about \b((1[0-2]|0?[1-9]):([0-5][0-9])\s?([AaPp][Mm])) for optional space between time and meridiem?
- RegEx, either 0, 1-9. 1-9 or 10. 0? - Stack Overflow
I think this one is more robust? ^0$|^[1-9]{1}\ [0-9]{1}$|^10\ 0$ Main things to worry about are the above ones will for example match 12 0, because the 0 is not anchored You also want to use {1} quantifiers in the decimal case, and include [0-9] after the decimal (so 7 0 is matched) EDIT: Explanation of changes Adding ^ and $ to each of the three options ensures that the match is the whole
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