As we said earlier Factory Mode and Abstract Factory Mode , let's talk about the builder model.
The builder mode is also a very common creation mode. The two factory modes mentioned earlier hide the properties and construction details of a class, while the builder mode exposes the properties of a class appropriately through the Build ...
Added by g-force2k2 on Sun, 22 Mar 2020 09:04:09 +0200
Definition of high-order function: high-order function refers to the function of operation function; generally, there are two situations in the process o ...
Added by kweathe on Sat, 21 Mar 2020 09:55:53 +0200
1. Each item must be filled in or selected, and cannot be empty;
2. User name: it can only contain English letters and underscores, with a length of 6-18 characters;
3. Password: it must contain English letters in upper and lower case and numbers, and the length cann ...
Added by gilang4 on Fri, 20 Mar 2020 20:47:39 +0200
In the past, when writing multithreading and multiprocessing, because they usually complete their own tasks, each subthread or subprocess does not have much contact before. If I need to communicate, I will use queue or database to complete it. But recently, when I write some codes of multithreading and multiprocessing, I found that if they need ...
Added by Rokboy on Fri, 20 Mar 2020 17:02:01 +0200
Example Github: WSL_FPS
FPS: Short for Frames Per Second, it means the number of frames transmitted per second, which can be understood as what we often call "refresh rate" (in Hz); FPS measures the amount of information used to store and display dynamic videos.The more frames per second, the smoother the p ...
The previous article explained the exclusive lock part of AQS (see: ReentrantLock source code analysis and AQS (1) ), this article will introduce the shared lock of AQS and ReentrantReadWriteLock based on the shared lock to separate the read and write locks. (if the method mentioned before is met, it will not be repeated)
First of all, ...
Added by stpra123 on Tue, 17 Mar 2020 15:55:13 +0200
Note: without special instructions, the versions of Flutter and Dart are as follows:
Flutter version: 1.12.13+hotfix.5
Dart version: 2.7.0
The Flutter does not have the DatePicker control. You need to use the showDatePicker method to pop up the date selection control. The basic usage is as follows:
onPressed: () ...
Added by tbales on Mon, 16 Mar 2020 15:03:39 +0200
Why use the output controller:
We know that the data in the computer is stored in the form of binary, but the code composed of 01 can represent both data and instructions. It's easy to misunderstand if you don't use the output controller to become what you want.
If the 01 code represents data, then different output formats of the same 01 code ...
1. Title Description
The main idea of the topic
2, train of thought
3, AC code
4. Problem solving process
1. Title Description
Sample Input 1:
3 1 2 8 7 5 9 4 6 0
1 2 3 7 8 5 9 4 6 0
Sample Output 1:
1 2 3 ...
Added by batman99 on Fri, 13 Mar 2020 12:48:09 +0200
There are two kinds of comparison algorithms, one is comparison algorithm, the other is non comparison algorithm.
Comparison algorithms are: bubble sort, select sort, insert sort, merge sort, heap sort, fast sort, Hill sort.
Non comparison algorithms are: count sort, cardinality sort, bucket sort.
Added by joecrack on Fri, 13 Mar 2020 09:02:27 +0200