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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Perform: Traversing Elements with children

Posted by Jennelle Barajas
Jennelle Barajas
5,317 Points

What does Andrew mean by "cycle over"?

When we get to the part where we

//cycle over incompleteTasksHolder ul list items

What does he mean by cycle over?

I am not sure what exactly we are trying to accomplish by writing this function.

Are we writing a function that will jump from ul to li?

If so, why?

Here is the completed mark-up by the end of this lesson:

//cycle over incompleteTasksHolder ul list items
for(var i = 0; i < incompleteTasksHolder.children.length; i++); {
   //bind events to list item's children (taskCompleted)
  bindTaskEvents(incompleteTasksHolder.children[i], taskCompleted);

}

I am generally confused with this lesson.

Thank you in advance!

-Jennelle

2 Answers

Hugo Paz
Hugo Paz
15,622 Points
Hugo Paz
Hugo Paz
15,622 Points

Hi Jennelle,

It means cycling through all list elements that are in the incompleteTasksHolder unordered list.

Imagine having a list with 5 items, you cycle through each one to check their status.

Eric Trego
Eric Trego
15,308 Points

Hugo what is the difference between using

///////// for( var i = 0; i < .length; i++) /////////

and using /////// for (var i= 0; i < .length; i + 1) ////////

Hugo Paz
Hugo Paz
15,622 Points
Hugo Paz
Hugo Paz
15,622 Points

Hi Eric,

I believe you meant i+=1. If you use i + 1, i never changes so the condition is never met and you have an infinite number.

There is no difference between them(i++ and i+=1). It is just easier to read what is happening with i+=1 and you can change the increment value, like i+=3 will increment i by 3 every loop.

Judd Higgins
Judd Higgins
8,846 Points
Judd Higgins
Judd Higgins
8,846 Points

Jennelle, you are not alone. This is probably the most confusing lesson thus far of my Front End Web Development track.