programing pearls

return a static object as the key value, which is why hashmap allows the null key value. Int hash = hash (k );Int I = indexfor (hash, table. Length ); The two consecutive steps are the best part of hashmap! I feel ashamed after the study. Hash is to hash the object's hashcode through the key, and then obtain the index value in the object table through indexfor. Table ??? Don't be surprised. In fact, hashmap can't go anywhere. It uses tables to put it. The best way is to use hash to correctly re

copyright lawsuit!-- Sorry !)The so-called API is the application programing interface, which is written by the operating system in C language.Function called by the user. Windows API functions consist of many "dynamic connection libraries" or DLL. In 32-bit windows, the core windowsAPI dll has the following:Gdi32.dll -------- graphic display interface APIKernel32.dll ----- API for processing low-level tasks (such as memory and task management)User32

Building skills in Python version 2.5 Python free online eBooks Python Bibliotheca Think Python Data structures and algorithms in Python How to think like a computer scientist: learning with Python Python for fun Invent your own computer games with Python Thinking in Python The Django book Snake wrangling for kids Ruby Programming Ruby Why's (Poignant) Guide to Ruby (mirror via scribd) Mr. neighborly's humble little Ruby book Ruby Best Pra

Microsoft's workflow (WWF), Windows Presentation Foundation (WPF), and Windows comunications Foundation (WCF) are Microsoft's Vista and. NET 3. x strategies. The main function of Windows workflow is to separate the logical control from the form. The logic is created as a specialized workflow file (expressed in C # or XML). The form is the traditional winform, webform, or console. The communication media between them is interfaces ). There are three types of workflow: sequential, State, and data

original ideas, development environment, and application scenarios, There is no distinction between good and bad, and the idea is worth exploring. In this way, you can select a suitable language to achieve twice the result with half the effort. While organizing the computer, accidentally turning to "programing in objective-c" under a "hidden" Directory "; The first page is fascinating. It's really "no crazy, no survival ". A few days

considered a bad thing 30 years ago, as shown in 1. Code is similar, 2. Code and interface are different and have similar functions.There is nothing special about how to remove duplicates.Extract Method (same class ). When there is a difference, the sharing is achieved through parameterization.Pull up method to parent class (same parent class ). When there is a difference, the template mechanism is used for sharing.Class A calls Class B or extract class C (two completely unrelated classes)1.3 n

Functional programing seems to be very popular recently. The program magazine in February also published two-day articles about FP. Funtional programming is a traditional way of thinking about imperative. Through FP learning, we can better analyze the problem from the perspective of [How to Solve the Problem. For my recent understanding, I can lay the following tags for FP:1. fp features and functions are implemented through the high-order function a

Http://www.cnblogs.com/yangy608/archive/2010/11/14/1876839.htmlAOP (aspect-oriented programming, aspect-oriented programming) can be said to complement and improve OOP (object-oriented programing, object-oriented programming). OOP introduces concepts such as encapsulation, inheritance, and polymorphism to create an object hierarchy that simulates a collection of public behavior. When we need to introduce public behavior to scattered objects, oop seems

understanding, it is in the same process or a parent-child process group.) There is a more concise function called tmpfile. The tmpfile function creates and opens a temporary file, and automatically runs the unlink temporary file. The tmpfile function returns a file descriptor. If execution fails, NULL is returned. When the program executes fclose or exits, the resource is released.Mktemp, tmpnam, and tempnam functions are also provided in linux, but they are not recommended for robustness and

press"4"Twice. to type"!", Press"0"Three times. Petr has to apply this simple algorithm to calculate the cost of every slogan he sends. however, Petr is a very busy man (and, as a matter of fact, doesn't bother to learn arithmetics, because he's a philosophy student ). you just have to help Petr, you are his best friend after all.Input The single line of input contains the slogan. slogan consists of words, spaces, commas, full stops and exclamation marks. all the words consist of lowercase Engl

, it will return a static Object as the key value, which is why HashMap allows the null key value. Int hash = hash (k );Int I = indexfor (hash, table. Length ); The two consecutive steps are the best part of HashMap! I feel ashamed after the study. hash is to hash the Object's hashcode through the key, and then obtain the index value in the Object table through indexFor. Table ??? Don't be surprised. In fact, HashMap can't go anywhere. It uses tables to put it. The best way is to

In the past, my company's boss asked everyone to recommend C language teaching materials. After I struggled, I killed all the proposals for purchasing tan haoqiang's books, finally, I bought the C programing language. Tan haoqiang writes books like Kong Yiji's learning. There are several ways to write the word "" of "xiangdou. That is to say, his book is full of useless trivial details. Tan haoqiang's book never tells you why and won't teach you ho

define additional instance variables to extend the class, which is not allowed in the naming class, and the declared method must be implemented in the main implementation area, cannot be implemented in the separation implementation area10. ProtocolList of methods shared by multiple files. Only method names are available and are not implemented. These are implemented in classes that comply with this Protocol. -- Similar interface@ Protocol name@ Optional // select the implementation method@ Requ