Javascript Regexp [closed] - javascript

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I am stuck with a regexp to test that a string contains only:
letters lowercase or uppercase
"." (dot sign)
digits
"_" (underscore sign)
any other character except above will need to be an invalid input
1dx.tex - OK
Ted_upcD.t3 - OK
$tex._ce - FAIL(invalid char$)
Thank you !


^[\w.]+$
This should do it....

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Regex match a string whose before and after not a letter [closed]

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for example
I would like to match three null in
Sat:null-5:00pm
Sun:null-null
but not a null in snullagain.
How to write such a regex in javascript?

I believe what you want is: \bnull\b
That translates to "word boundary, followed by the word null, followed by a word boundary"

persian phone number regex [closed]

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I am new in programming. I want to implement phone number validation using javascript in my website. I want some regex with conditions below:
a digit with length of 11
it should start with 09
no any string or space in the input is accepted
e.g.
"09131234455" // is accepted
"091 05488963" // not accepted
thanks anyone can help!!

Try: ^09\d{9}$ (first '09', then 9 digits, all this surrounded with
"start of string" and "end of string" anchors).

How to split a JavaScript String by commas and dots? [closed]

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I want to split strings by commas and dots using javascript. For example, a string of "10,256,326.26" would turn into ["10", "256", "326", "26"] after getting split.
Which regex can I use for this?

You can use a character class containing all characters on which you want to split
var s = "10.269,69";
document.write(s.split(/[,.]/))

You can use split() with a regex:
console.log(str.split(/,|\./));

Only if contains >< /!a-zA-Z or some of them with regular expression [closed]

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I need to check string if contains >< /!a-zA-Z or some of them (Also contains space). The only thing I know is a-zA-Z i need an example in C# or Javascript.

Use a "character class".
/[>< \/!a-zA-Z]/
Note that I've escaped the forward slash, since we're using forward slashes as delimiters.

JavaScript : Alphanumeric REGEX pattern [closed]

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My regex pattern for alphanumeric word is as given below :
/([A-Za-z0-9])*$/
Is "testuser" a valid input string for the above pattern?

Use character class.
So use: /^[A-Za-z0-9]+$/
And yes, testuser is a valid input for the above regex.

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