check if a string with wildcard matches another string in javascript

To check if a string with a wildcard matches another string in JavaScript, we can use regular expressions. Regular expressions allow us to search for patterns in strings, and the "wildcard" character in regular expressions is the dot (.) character.

Here's an example code snippet that checks if a string with a wildcard matches another string:

index.tsx
function stringMatchesWildcard(strWithWildcard, str) {
  // Replace wildcard with regex dot (.) character
  var regexStr = strWithWildcard.replace(/[*]/g, '.');
  
  // Create regex object
  var regex = new RegExp('^' + regexStr + '$');
  
  // Test if str matches regex
  return regex.test(str);
}

// Example usage:
console.log(stringMatchesWildcard('h*llo', 'hello'));   // true
console.log(stringMatchesWildcard('h*llo', 'hallo'));   // true
console.log(stringMatchesWildcard('h*llo', 'hxllo'));   // false
console.log(stringMatchesWildcard('h***o', 'hello'));   // true
console.log(stringMatchesWildcard('h***o', 'heyo'));    // true
console.log(stringMatchesWildcard('h***o', 'hey'));     // false
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In the above code, the stringMatchesWildcard() function takes two arguments: strWithWildcard is the string with the wildcard (represented as an asterisk (*) character), and str is the string we want to test against.

The function first replaces all occurrences of the wildcard character with the regex dot character using a regular expression replace method. It then creates a new regex object by concatenating the regexStr with start and end anchors (^ and $). Finally, it tests if str matches the regex by calling the test method on the regex object.

The example usage demonstrates how the function can handle different patterns with the wildcard character.