Convert Javascript regex to Typescript regex

Convert Javascript regex to Typescript regex

By : Priyadharshini Eluma
Date : October 22 2020, 08:10 PM
With these it helps I have a regex which checks the inputText is in valid url format or not. And working almost good:
code :
checkUrlFormat() {
    const pattern = /^(((http|https)(:\/\/))?((www).)?)[a-z0-9]+(.|[a-z0-9])+[a-z0-9]$/;

    if (pattern.test(this.inputText) || this.inputText == null) {
      return false;
    return true;

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Convert JavaScript RegEx to C# RegEx for email validation

Convert JavaScript RegEx to C# RegEx for email validation

By : salmayusuf
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , As you are working with C#, you should be able to validate email addresses using the System.Net.Mail.MailAddress class. You can use it like this:
code :
public bool IsValidEmailAddress(string emailAddress)
        MailAddress m = new MailAddress(emailAddress);
        return true;
    catch (FormatException)
        return false;
convert HTML5 Regex pattern to javascript Regex

convert HTML5 Regex pattern to javascript Regex

By : saulojnr
Date : March 29 2020, 07:55 AM
This might help you Use the RegExp constructor :
code :
var regex = this.pattern,
    valid = new RegExp("^"+regex+"$").test( e.charCode );
convert regex string to regex object in javascript

convert regex string to regex object in javascript

By : ガンダム
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Two problems:
You need to escape the backslash. You need to remove the forward slashes on the beginning and end of string.
code :
var pattern = "^[A-Za-z\\s]+$";
var str = "Some Name";
pattern = new RegExp(pattern);
How to convert C# regex to typescript regex?

How to convert C# regex to typescript regex?

By : Crystal Merritt
Date : March 29 2020, 07:55 AM
Hope this helps The C# code you've provided uses C#'s Verbatim string syntax, which doesn't require escaping of backslashes. To convert it to a normal string literal, which would be the same in C# and JavaScript, you can remove the @ symbol at the front and then escape backslashes by adding another backslash before them:
code :
let emailRegularExpression = new RegExp("^([0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z-])*@([0-9a-zA-Z][-\\w]*[0-9a-zA-Z]\\.)+[a-zA-Z]{2,9})$");
let emailRegularExpression = /^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z-])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
How to convert the Javascript Regex in Java RegEx without break the functionality

How to convert the Javascript Regex in Java RegEx without break the functionality

By : user3728260
Date : March 29 2020, 07:55 AM
This might help you The problem you're running into is that while JavaScript has a literal notation for regular expressions (this is the /.../g syntax), Java does not. In Java, you do not pass a RegEx using slashes. As you've quoted in your answer, the function signature for String.replaceAll() accepts a String as the first argument, which you are not providing.
It should work if you simply replace the slashes and global flag (replaceAll already attempts effectively a global match) with quotes to make it a String literal. Like this:
code :
String str="Customer AA: 2 TSRAs for closing the accounts. No suspicion is noted although the client is moving back to Iran.. HKD1531504.84.";
String finalStr=str.replaceAll("[^a-zA-Z0-9 \n\t,./;':<>?`\\-~!@#$%^&()_+=\"[\\]{\\}|\\*]", " ");
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