By Fred Hebert
Erlang is the language of selection for programmers who are looking to write strong, concurrent functions, yet its unusual syntax and sensible layout can intimidate the uninitiated. fortunately, there's a brand new weapon within the conflict opposed to Erlang-phobia: examine You a few Erlang for excellent Good!
Erlang maestro Fred Hebert starts off sluggish and eases you into the fundamentals: You'll know about Erlang's unorthodox syntax, its information buildings, its kind procedure (or lack thereof!), and easy sensible programming options. as soon as you've wrapped your head round the easy stuff, you'll take on the genuine meat-and-potatoes of the language: concurrency, dispensed computing, scorching code loading, and the entire different darkish magic that makes Erlang one of these scorching subject between today's savvy developers.
As you dive into Erlang's useful delusion global, you'll examine about:
- checking out your purposes with EUnit and customary Test
- construction and freeing your functions with the OTP framework
- Passing messages, elevating blunders, and starting/stopping methods over many nodes
- Storing and retrieving information utilizing Mnesia and ETS
- community programming with TCP, UDP, and the inet module
- the easy joys and capability pitfalls of writing allotted, concurrent applications
Packed with lighthearted illustrations and simply the correct mix of offbeat and useful instance courses, research You a few Erlang for nice sturdy! is the precise access element into the sometimes-crazy, always-thrilling international of Erlang.
Read Online or Download Learn You Some Erlang for Great Good!: A Beginner's Guide PDF
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Extra info for Learn You Some Erlang for Great Good!: A Beginner's Guide
Sample text
213,45,132,64,76,32,76,0,0,234,32,15>> 9> R. 213 In this example, Rest/binary is a specific notation that lets you say that whatever is left in the binary, whatever length it is, is put into the Rest variable. So <
Note Technically, variables can also start with an underscore (_), but by convention, their use is restricted to values you do not care about. This behavior of the = operator is the basis of something called pattern matching, which many functional programming languages have, although Erlang’s way of doing things is usually regarded as more flexible and complete than the alternatives. You’ll learn more about Erlang pattern matching when we visit other data types in this chapter, and also see how it works with functions in the following chapters.
Don’t hesitate to try the examples in this section until you understand them! List comprehensions are based on the mathematical idea of set notation, so if you’ve ever taken a math class that dealt with set theory, list comprehensions may look familiar to you. Set notation describes how to build a set by specifying properties its members must satisfy. For instance, here’s a 2 basic example: {x ∈ : x = x } . This describes the set of all real numbers that are equal to their own square. ) A simpler example of set notation is {x : x > 0} .