Full Stack Web Development MASTERY Course - Novice to Expert - Regular Expressions in JavaScript

This tutorial introduces JavaScript regular expressions, explaining their syntax and usefulness. It covers creating regex using forward slashes and demonstrates various JavaScript functions like exec, test, match, search, and replace. The tutorial also explains the use of flags for global and case-insensitive searches, providing examples to illustrate these concepts.

What are regular expressions primarily used for in programming?

• To create complex algorithms

• To match character combinations in strings

• To compile code

• To manage databases

How do you create a regular expression in JavaScript?

• Using parentheses

• Using forward slashes

• Using curly braces

• Using square brackets

Which function returns an array for a match or null for no match?

• search

• exec

• test

• match

What does the 'g' flag do in a regular expression?

• Makes the search case-sensitive

• Searches globally in the string

• Stops after the first match

• Ignores whitespace

What is the result of the test function if a match is found?

• An array

• A string

• True

• False

Which flag makes a regular expression case-insensitive?

• g

• i

• m

• s

Which function returns the index of the first match or -1 if no match is found?

• search

• exec

• test

• match

What does the replace function do?

• Splits a string

• Finds a string

• Replaces a string with a new string

• Deletes a string

What is the correct syntax for using the match function?

• string.search(regex)

• regex.search(string)

• string.match(regex)

• regex.match(string)

What will the search function return if no match is found?

• Null

• An empty array

• Zero

• -1