Edit expression guide

[btbinhtran]

I'm going through all the guides again and improving their logical layout, grammar, spelling, etc ...
Still a work in progress, so don't merge just yet.

For the expression guide,

I'm confused on how the buffer works on one of the example expressions:

<div data-list="user in users [buffer: 2, max: 10]"></div>

What would be an example of the outputted HTML?

[lancejpollard]

Sounds good. Feel free to change content as well if you want.

[lancejpollard]

That buffer example isn't really relevant for the directives/expressions guide, you can remove that. What we are thinking is that the list element/directive should handle buffering, so if you have thousands/millions of list items, but only 10 are visible, and you scroll, you may want to actually have 12 DOM elements (buffer: 2), so you can recycle DOM elements (only creating 12 instead of thousands), but have a few spare elements to improve perceived performance. More of a list element thing than anything specific to directives/expressions.