abstraction def

Lecture4:decomposition and abstraction through functions;introduction to recursion function decomposition abstraction and recursionFunctions function Block up into modules decomposition into modules Suppress detail ignoring details

6.1 laziness is a virtue Currently, the programs we write are very small. If you want to write a large program, you need to reuse the code. This problem can be solved by creating a function. 6.2 abstraction and Structure Abstraction can save a lot

#面向对象: polymorphism, encapsulation, inheritance#1 polymorphism: It means that even if you don't know what type of object the variable refers to, you can manipulate it, and it will behave differently depending on his type.#多态和方法From randomImport

Privatedef fileshere = (NewJava.io.File (".") . Listfiles () def filesending (query:string)= for(File iffile.getName.endsWith (query)) yield file def filescontaining (query:string)= for(File iffile.getName.contains (query)) yield file def filesregex

First, create a function>>> Import Math>>> x=1>>> y=math.sqrt>>> callable (x) #显示False>>> callable (y) #显示True1, Def, used to create functions>>> def hello (name)>>> return ' Hello, ' +name+ '! '>>> Print (Hello (' World '))Show: Hello, World2. Add

6.4.5 reversal process We have already discussed how to collect parameters as tuples and dictionaries. But in fact, if you use * and *, you can perform the opposite operation. >>> def add(x,y): return x+y>>> params=(1,2)>>> add(*params)3 You can

Fibonacci sequence Fibonacci Sequence, also known as the Golden section of the series, refers to such a series: 0, 1, 1, 2, 3, 5, 8, 13, 、...... Mathematically, the Fibonacci sequence is defined as a recursive method: F (0) =0,f (1) =1,f (n) =f (n-1)

I. Object-oriented and process-oriented1.1 Process-oriented featuresThe advantage is that it greatly reduces the complexity of the writing process, and only needs to stack the code along the steps to be performed.The disadvantage is: a set of

First, what is object-oriented programmingOO programming (Object Oriented programming), or OOP, is a programming idea. OOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data.Process-oriented

# "Functional Programming" """"function is a kind of encapsulation supported by Python, we can decompose complex tasks into simple tasks by splitting large pieces of code into functions through a layer of function calls, which can be called