Download Raspberry Pi Hacks: Tips & Tools for Making Things with the by Ruth Suehle, Tom Callaway PDF
By Ruth Suehle, Tom Callaway
With greater than 60 useful and inventive hacks, this e-book is helping you switch Raspberry Pi into the center piece of a few cool electronics initiatives. are looking to create a controller for a digicam or a robotic? arrange Linux distributions for media facilities or PBX cellphone structures? That’s only the start of what you’ll locate within Raspberry Pi Hacks.
If you’re seeking to construct both a software program or venture with extra computing energy than Arduino by myself grants, Raspberry Pi is simply the price ticket. And the hacks during this ebook provides you with plenty of nice ideas.
• Use configuration hacks to get extra from your Pi
• construct your personal internet server or distant print server
• Take the Pi outdoor to observe your backyard or regulate vacation lighting fixtures
• connect to SETI or build an amazing Halloween dress
• Hack the Pi’s Linux OS to help extra advanced initiatives
• Decode audio/video codecs or make your personal song participant
• in attaining a low-weight payload for aerial images
• construct a Pi desktop cluster or a solar-powered lab
Read or Download Raspberry Pi Hacks: Tips & Tools for Making Things with the Inexpensive Linux Computer PDF
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Thus, the following declarations are all equivalent. Note that [] is used to represent the empty list and that :: is right-associative: OCaml utop (part 29) 12 # # # - [1; 2; 3];; : int list = [1; 2; 3] 1 :: (2 :: (3 :: []));; : int list = [1; 2; 3] 1 :: 2 :: 3 :: [];; : int list = [1; 2; 3] | Chapter 1: A Guided Tour The :: operator can only be used for adding one element to the front of the list, with the list terminating at [], the empty list. There’s also a list concatenation operator, @, which can concatenate two lists: OCaml utop (part 30) # [1;2;3] @ [4;5;6];; - : int list = [1; 2; 3; 4; 5; 6] It’s important to remember that, unlike ::, this is not a constant-time operation.
Functional code is the default in OCaml, with variable bindings and most data structures being immutable. But OCaml also has excellent support for imperative programming, including mutable data structures like arrays and hash tables, and control-flow con‐ structs like for and while loops. Arrays Perhaps the simplest mutable data structure in OCaml is the array. Arrays in OCaml are very similar to arrays in other languages like C: indexing starts at 0, and accessing or modifying an array element is a constant-time operation.
Options Another common data structure in OCaml is the option. An option is used to express that a value might or might not be present. For example: OCaml utop (part 37) # let divide x y = if y = 0 then None else Some (x/y) ;; val divide : int -> int -> int option =