I've looked all over the Wolfram Documentation and done various searches on the web and this site and I can't find an explanation of the single "@" symbol as a means of applying functions.
It seems to perform as an alternate syntax to the full form of a function. I've used it with my own function definitions and with Length, and it seems to work.
What's unnerving to me is that I cannot find a clear explanation in the documentation, any tips on how to better find this stuff in the documentation would be appreciated. Thank you.