Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Introducing ES2015 ES2015 Basics String Search Methods

Posted by Adam Lyles Kauffman
Adam Lyles Kauffman
14,016 Points

.indexOf method

why was this expression true in this video? i dont understand what this method is doing. what exactly is the zero index of the string?

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

strToSearch.indexOf(searchvalue) returns a number representing the position (starting at zero) where the specified searchvalue occurs for the first time, or -1 if it never occurs in strToSearch. 0 is the location of the first instance of 'a-really' in 'a-really-long-hyphenated-string'. So strToSearch.indexOf('a-really') === 0 is true.