COMMAND SET Assumptions Commands ^^^ {Enter Local Command Mode} !!! {Enter Remote Command Mode}AT ATA {Answer Call} ATD, {Make Connection} ATDU, {Make Authenticated Connection} ATDY, {Make Encrypted Connection} ATDUY, {Make Authenticated/Encrypted Connection} ATDL {Remake Connection} ATDR {Make Connection to peer specified in AT+BTR} ATEn {Enable/Disable Echo} ATH {Drop Connection} ATIn {Information} ATO {Enter Data Mode} (letter ‘o’) ATSn=m {Set S Register} ATSn? {Read S Register Value} ATSn=? {Read S Register – Valid Range} ATX {Send Data in Local Command and Connected Mode}
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Incorporating the possibility of attaching attributes to variables in a logic programming system has been shown to allow the addition of general constraint solving capabilities to it. This approach is very attractive in that by adding a few primi- tives any logic programming system can be turned into a generic constraint logic programming system in which constraint solving can be user defined, and at source level-an extreme example of the “glass box” approach. In this paper we propose a different and novel use for the concept of attributed variables: developing a generic parallel/concurrent (constraint) logic programming system, using the same “glass box” favor.
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That would imply that the language works primarily on the computer’s terms. That the language is designed to accommodate the computer, first and foremost. That therefore, we, the coders, are foreigners, seeking citizenship in the computer’s locale. It’s the computer’s language and we are translators for the world. But what do you call the language when your brain begins to think in that language? When you start to use the language’s own words and colloquialisms to express yourself—Say, the computer can’t do that. How can it be the computer’s language? It is ours, we speak it natively! We can no longer truthfully call it a computer language. It is coderspeak.
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Ruby on Rails Commands
gem update rails
rails applicaittion
rake appdoc
rake –tasks
rake stats
ruby script/server
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In Ruby, super is not a reference to a parent class; instread it is an executable statemtn that reinvokes the current method, skipping any definition in the class of the current object. Attributes, Instance Variables, and Bertrand Meyer The initialize method in class Song contains the line @title = title Names that start with single “at” signs @ are instance variables - variables that are specific to a particular instance or object of a class. In our case, each Song object has its own title, so it makes sense to have that title be an instance variable.
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Invisible Ruby on Rails Reference 1.1.2 This is a “short” Ruby on Rails reference. It’s goal is to give you an overview over the most used functions/methods / classes. It’s not tutorial, but as a handy guide when you are already know your way around. 2 Railties 2.1 Create a rails application
$ rails app_name
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Ruby 1.8.4 Types Expression Variables Predefined Variables Ruby arguments Reserved Words Operator and Presedence Regex Exceptions Module/Class Constants Object Array File String Hash Dir Kernel Test::Unit DateTime
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Domain-Specific Languages for Programmers Metaprogramming • My definition: “programming your programming.” • Change the way you program in your programming language. • Transform your general -purpose language … • Make it a domain-specific language. • Program in a language designed for the problem you’re solving. isp • Metaprogramming seems to have originated in Lisp. Lisp is a programmable programming language. —John Foderaro In Lisp, you don’t just write your program down toward the language, you also build the language up toward your program. —Paul Graham • Lisp isn’t the only programmable language Ruby.

Rubyists have been rediscovering metaprogramming. • Ruby style and idioms are still changing and adapting. Rails leverages metaprogramming heavily. • To great effect! • Ruby is a natural for metaprogramming.

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