iterative design
over traditional “big design up front” development. Although the methodology is just a few years
old, its conceptssuch as “minimum viable product” and “pivoting”have quickly taken root in the
start-up world, and business schools have already begun adapting their curricula to teach them.
The lean start-up movement hasn’t gone totally mainstream, however, and we have
iterative design over traditional “ big design up
front” development. Although the methodology is just a few years
old, its concepts such as “ minimum viable product” and
“ pivoting” have quickly taken root in the start- up world, and
business schools have already begun adapting their curricula to
teach them.
The lean start- up movement
hasn’t gone totally mainstream,
however, and
iterator
+ a lot more good things
1. Ruby란 무엇인가?
*
Ruby는 일본에서 유키히로 마츠모토에 의해 만들어졌으며 1995년부터 일본에서 빠른 속도로 대중적인 언어로 사용됨
Yukihiro Matsumoto
=> 컴퓨터를 알게된 후, 프로그래밍 언어에 흥미를 가지게 됨.
스크립트 언어의 힘과 가능성을 믿고, 객체지향 프로그래밍이
public Patron patron;
public Book(){}
public boolean equals(Object node){
return title.equals(((Book)node).title);
}
public String toString(){
return " *"+title+(patron != null? "\n"+"-->"+patron.name+" //checked out to "+patron.name : "")+"\n";
}
}
class BookList extends LinkedList{
public BookList(){
super();
}
public void display(){
for(int i = 0; i
6.1 It will be useful to keep the following representation of the N tracks of a disk in mind:
a. Let us use the notation Ps [j/t] = Pr [seek of length j when head is currently positioned over track t]. Recognize that each of the N tracks is equally likely to be requested. Therefore the unconditional probability of selecting any particular track is 1/N. We can then state:
In the former case,