February 2013
Intermediate to advanced
538 pages
20h 55m
English
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Name
prev
Synopsis
mixed prev(array array)Moves the internal pointer to the element before its current
location and returns the value of the element to which the internal
pointer is now set. If the internal pointer is already set to the
first element in the array, returns false. Be careful when iterating over an
array using this function—if an array has an empty element or an
element with a key value of 0, a
value equivalent to false is
returned, causing the loop to end. If an array might contain empty
elements or an element with a key of 0, use the each() function instead of a loop with
prev().
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.