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JavaScript Introduction to jQuery DOM Traversal Why We Traverse the DOM

katia lishnevsky
PLUS
katia lishnevsky
Courses Plus Student 1,685 Points
Posted by katia lishnevsky
katia lishnevsky
Courses Plus Student 1,685 Points

why we can set any name for parameter in the function?

if we'll pass 'student' into the function , it will bee the same as 's'. and why it will not work without any parameter?

students.forEach(function(s) { console.log(s.name); });

Thanks!

Stephan Olsen
Stephan Olsen
6,650 Points
Stephan Olsen
Stephan Olsen
6,650 Points

So when you use forEach on an array, it takes a function as a parameter to call for each element in the array. This function takes the current value as first parameter. In your example the s is just representing the current value, and you're using it inside the function scope to log the name out to the console.