Regular Expression To Test The Validity Of An Input Date?
Jan 6, 2011
I have the following regular expression to test the validity of an input date:
([0-9][0-9]|[0-9])[s/-]([0-9][0-9]|[0-9])[s/-]([0-9][0-9][0-9][0-9]|[0-9][0-9])
It should allow 1 or two digits for the day of the month, then a separating character (" ", "/" or "-"), then 1 or two digits for the month, then 2 or 4 digits for the year.
Unfortunately it will accept anything above 2 digits for the year, which I understand why is happening but don't know how to fix!
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Mar 9, 2009
I have JS code which checks password contains atleast 8 chars, 1 uppercase, 1 lower case and 1 number.
So I have a form where in a field new_password is passed like this on submit.[code]...
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Aug 26, 2010
I have this expression:
/(19|20)dd/)[- /.](0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])
to detect if my date:
2010-12-15
is valid. It's not working. What do I have wrong?
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Jul 6, 2009
I am trying to test some strings against a regular expression, but have tried at least 10 different online testers with no success at all. Plus I've tried some code to do it myself, again with no success. I know for a fact that some of the strings should match and some shouldn't match, but I am getting "No match" returns from all the strings.
Does somebody have some page code that has the regular expression in some javascript code in the head section of a document, then a form in the body that I can enter the text string, click a button, and I get an alert saying if the string matches or not?
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Jul 23, 2005
I have the following regular expression to validate a date-time field
in European or d/m/y h:m:s format.
^((((31/(0?[13578]|1[02]))|((29|30)/(0?[1,3-9]|1[0-2])))/(1[6-9]|[2-9]d)?d{2})|(29/0?2/(((1[6-9]|[2-9]d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))|(0?[1-9]|1d|2[0-8])/((0?[1-9])|(1[0-2]))/((1[6-9]|[2-9]d)?d{2}))
(20|21|22|23|[0-1]?d):[0-5]?d:[0-5]?d$
I wish to ammend it so that the time or h:m:s part is validated only if
supplied (i.e. I wish to make the time part optional). At present if a
time is not supplied the validation fails. I gather that the following
part of the above expression
(20|21|22|23|[0-1]?d):[0-5]?d:[0-5]?d$
validates the time, however I don't know the syntax to make it
optional.
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Dec 9, 2006
I am creating a simon says game, the game is based on 4 images (each has an opposite) when the game begins one of the image randomly flashes, the flash is between itself and its opposite (day and night). the user is then to mimic that flash by clicking on that image. If he clicks in that image then i want the move to be correct or 'true' if he clicks on another image i want the move to be incorrect 'false'. if false he will be redirected to an alert box thats says game over, if true then 2 of the images then flash as opposed to only one, again randomly. I am unsure how to test if it is correct or incorrect and then if correct get 2 of the images to flash randomly and so on. Can anyone help? please? here is what i have so far:
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Nov 26, 2009
What expression would I use to validate a field's data - that cannot be anything but an integer?
An empty field is also invalid, or one with a space in it.
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Nov 22, 2011
i studied what is RegEx and i wan't to implement it. problem is i don't know how to use it or check it aganist any input text field etc.
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Mar 28, 2009
I want input in format "A-xxxx-xxx". where 'x' is any alphanumeric character.
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May 12, 2011
Is there difference in using regexp.test(string) or str.search(regex)? Getting difrnt results when I use one vs to other.
I use sample: [URL]. For input value "tes?t.txt" I get different output when using search method vs test method.
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Dec 20, 2005
Could somebody please confirm that if I change my JS expression test from:
if (!(/^[a-zA-Z0-9]*$/.test(document.form1.fred.value)))
to
if (!(/^[a-zA-Z0-9-_]*$/.test(document.form1.fred.value)))
(in other words I've added the hyphen and underscore after the 9)
then I'm allowing the hyphen and underscore as valid chars like a-z 0-9, but
nothing else.
It appears to work, but I don't know if I've screwed up the whole test
rather just the chars I want to add.
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Feb 21, 2006
I have seen lot of reg. expession with ?:
For dummy eg
(((XXX)ddd)ff)
The above expression is modified as
(?:(?:(XXX)ddd)ff)
Although both the above expr. gives same result. (RegExp.match() gives
same o/p), most of the places , i have seen second option.
Yes, but different matches r shown (using RegExp.exec())
Is the second expr. most efficient or in particular scenarios?
Any comments???
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Jun 28, 2006
At the moment my code is like:
function telValid(inString) {
var regexp = /^[0-9 +()]+$/;
return (inString.match(regexp,''));
}
which is use to validate phone numbers (UK at the moment)
this works ok, but wont allow - (Dashes) which i need..
tried doing:
function telValid(inString) {
var regexp = /^[0-9 +-()]+$/;
return (inString.match(regexp,''));
}
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Jan 20, 2007
I am finding it difficult to find a regular expression for following situation(replace)
a b c d = a,b,c d
a b c = a,b c
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Feb 5, 2009
regular express to get the file name from a URL?
It has to be flexible in that the extension can be either 4, 5, or 6 chars (.php, .html, .shtml for example) and needs to cater for and whether querystring parameters exist too.
So, both
[URL]
and
[URL]
The regex should return newthread for both.
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Nov 13, 2009
I.E.:
---------------------------
Windows Internet Explorer
---------------------------
<EMBED src=http://www.youtube.com/v/JTmM3jut05Q&hl=en&fs=1& width=500 height=200 type=application/x-shockwave-flash allowfullscreen="true" allowscriptaccess="always"></EMBED>
how can i get "src" value in above code using regular expression?
<object width="500" height="200"><param name="movie" value="http://www.youtube.com/v/JTmM3jut05Q&hl=en&fs=1&"><param name="allowFullScreen" value="true"><param name="allowscriptaccess" value="always"><embed src="http://www.youtube.com/v/JTmM3jut05Q&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="500" height="200"></object>
how can i get "src" value in above code using regular expression?
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Jul 7, 2010
what will be the regular expression for this line:
Code JavaScript:
var id = $(this).attr("href").substring( $(this).attr("href").lastIndexOf('#'), $(this).attr("href").length);
Basically it gets the string after # in href attribute of clicked anchor tag.
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Dec 30, 2004
When Internet Explorer 5.01 for Windows hits the regular expression:
/(?=<)|>/
it complains about an unexpected quantifier. In fact, it seems to complain whenever I use a lookahead expression. Is there any way around this?
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Jul 23, 2005
does anyone know how I can build a regular expression e.g. for the
string.search() function on runtime, depending on the content of
variables? Should be something like this:
var strkey = "something";
var str = "Somethin like this";
if( str.search( / + strkey + / ) > -1 )
{
...
}
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Dec 7, 2006
I need a regular expression that will validate a double quote comma
delimited list where the odd entries are numeric and the even are
alphabetical. Each pair must also be on a separate line. For example:
"1","Peter"
"2","Paul"
"3","Mary"
I've used the following expression to validate comma delimited lists, but
without the double quotes, numeric/alpha pairing and line return
restriction.
^([A-Za-z0-9]?)+([,]s?([A-Za-z0-9]?)+)*$
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Oct 9, 2007
Normally I can write regular expressions decently well but for some
reason I am having trouble getting this to work. I am validating form
data and need to throw an error if there are ANY spaces in the field.
abc123 is fine, abc 123 is not. Any character is fine, just not a
space.
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Jul 20, 2005
All I'm trying to do is delete the lines which don't contain a particular
string. Actually a filter to edit a log file. I can find and replace a thing
with null, but can't figure out how to find the lines which do not contain
the thing.
Going further, I want to generalize and use a JavaScript variable containing
the decision string, but first I need to worry about the not-within-a-line
problem.
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Aug 7, 2009
I would like to validate a textbox that numbers cannot be entered into the text input, how do i do this??? With regular expression??
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Oct 15, 2010
Does jQuery support a regular expression as a selector? eg: so I can get every element with a id beginning with "test"
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Mar 19, 2008
I've got a somewhat cumbersome function that looks like this.
Code:
parseCSVLine = function (line)
{
var tmp = [];
var inQuote = false;
[Code]....
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Apr 30, 2009
Here is the form in question: spraytechDOTcom/download_form.asp I am so close to getting this to work the way that I want, but here is what I am having an issue with: I cannot seem to make it look for the 12 digits that are in the phone numbers that we are going to collect. Ex. 800-123-4567
It doesn't have require 12 characters if there is another way to get the number to validate looking like the example above. Here is my regular expression that I am struggling with:
var re = /[^d-]$/ It seems to block any letters, but it will accept only 1 number. I would really like it to make sure that the phone number is only entered like this: 800-123-4567.
I have looked for days trying to figure this out and have only gotten close.
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