how to use the ismatch function from the underscore library in javascript

The _.isMatch function from the Underscore.js library is typically used to check if an object has the same properties and values as the source. However, the function can also be used to check if a string matches a regular expression pattern.

Here's an example code that demonstrates how to use _.isMatch function to test if a string matches a pattern:

index.tsx
const _ = require('underscore');

const pattern = /^[A-Z][a-z]+\s[A-Z][a-z]+$/; // pattern to test
const fullName = 'John Doe'; // string to test

if (_.isMatch(fullName, pattern)) {
  console.log(`${fullName} matches the pattern.`);
} else {
  console.log(`${fullName} does not match the pattern.`);
}
303 chars
11 lines

In this example, we're using a regular expression pattern /^[A-Z][a-z]+\s[A-Z][a-z]+$/ to validate that fullName is a string consisting of two words with the first letter of each word capitalized. We're passing fullName and pattern as arguments to the _.isMatch function. The function returns true if the string matches the pattern, and false otherwise.

In the example above, fullName matches the pattern, so the output will be: John Doe matches the pattern.