freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method.english.md

id	title	challengeType	forumTopicId
587d7db3367417b2b2512b8e	Using the Test Method	1	301369

Description

Regular expressions are used in programming languages to match parts of strings. You create patterns to help you do that matching. If you want to find the word "the" in the string "The dog chased the cat", you could use the following regular expression: /the/. Notice that quote marks are not required within the regular expression. JavaScript has multiple ways to use regexes. One way to test a regex is using the .test() method. The .test() method takes the regex, applies it to a string (which is placed inside the parentheses), and returns true or false if your pattern finds something or not.

let testStr = "freeCodeCamp";
let testRegex = /Code/;
testRegex.test(testStr);
// Returns true

Instructions

Apply the regex myRegex on the string myString using the .test() method.

Tests

tests:
  - text: You should use <code>.test()</code> to test the regex.
    testString: assert(code.match(/myRegex.test\(\s*myString\s*\)/));
  - text: Your result should return <code>true</code>.
    testString: assert(result === true);

Challenge Seed

let myString = "Hello, World!";
let myRegex = /Hello/;
let result = myRegex; // Change this line

Solution

let myString = "Hello, World!";
let myRegex = /Hello/;
let result = myRegex.test(myString); // Change this line