The Ruby Programming Language pptx

... it: % ruby hello.rb hello world! Other Ruby Implementations In the absence of a formal specification for the Ruby language, the Ruby interpreter from ruby- lang.org (http:/ /ruby- lang.org) is the ... (3+2)+1 The first line passes the value 5 to the function f and then adds 1 to the result. Since the second line has a space after the function name, Ruby assume...

Ngày tải lên: 10/08/2014, 02:22

... (3+2)+1 The first line passes the value 5 to the function f and then adds 1 to the result. Since the second line has a space after the function name, Ruby assumes that the parentheses around the ... add -rubygems to the RUBYOPT environment variable, then the RubyGems library will be loaded on every invocation of Ruby. The rubygems module is part of the standard libr...

Ngày tải lên: 05/03/2014, 22:21

... evaluates to true, then the right operand is not evaluated. If the result type of the OrOr expression is bool then the result of the expression is true. If the left operand is false, then the right ... evaluated. If the result type of the AndAnd expression is bool then the result of the expression is false. If the left operand is true, then the right operand is...

Ngày tải lên: 27/06/2014, 11:20

... components of the language. Then we present complete programs that solve several familiar problems. The solutions illustrate the structure of JR programs and some—but by no means all—of the language s ... time, the one with the highest priority is permitted to do so. Each user process has an inde x i; the lower the index value, the higher the priority of the process. W...

Ngày tải lên: 27/06/2014, 11:20

... and indeed regularly use the entire language. For many years, the definition of C was the reference manual in the first edition of The C Programming Language. In 1983, the American National Standards ... putchar(c); } The while gets a character, assigns it to c, and then tests whether the character was the end-of-file signal. If it was not, the body of the while i...

Ngày tải lên: 14/11/2012, 17:10

... least you know the code on your end is consistent. At the moment there’s a lot more non-generic code out there then there is generic code, and there will inevitably be situations where they have to ... using the latest version of the Java programming language, which supports generics. Alas, in reality this isn’t the case. Millions of lines of code have been written in earlier ver...

Ngày tải lên: 26/10/2013, 18:15

... provide fur- ther support for paradigms. One language is not necessarily better than another because it possesses a feature the other does not. There are many examples to the contrary. The important ... about the subset of the language explicitly used to write a program. The first principle is an appeal to aesthetics and logic. The next two are expressions of the ideal of...

Ngày tải lên: 29/10/2013, 00:48

... guaranteed to solve the problem in question, even if they are not the optimum or the most elegant solution. Use them even if they are the most stupid solution, provided they work and they are not ... is often the case, all the work is done by the assignment statement embedded in the test part of the for. Again, the declarations of the arguments s1 and s2 omit the si...

Ngày tải lên: 17/02/2014, 15:20