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 One Solution

karan Badhwar
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points
Posted by karan Badhwar
.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points

Can somebody please explain me this line, step by step

const recipe = recipes.find( ({ id }) => id === +recipeId ); Please help me understand this line, like why we gave { id } object and the other code in this line

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

The ({ id }) => id part is called destructuring. It means that each item in recipes[] is an object, and we only want to look at the "id" property of that object. You can do the same thing without destructuring by writing this instead:
( item ) => item.id.

The + in front of +recipeId converts it from a string into a number, and the rest of line is just finding the object with the matching ID.