Programmer Think

We introduced the binary search tree and two higher-level data structures, set and mapping, which are implemented by the binary search tree. Tree data structure plays an important role in the field of computer. It is important because trees can produce many extensions, change or restrict the nature of tree data structure slightly i ...

Class inheritance As for the definition of inheritance of classes, we can understand it more or less as the relationship between father and son. Sons will inherit the attributes and methods of father. The father is the father and the son is the child. Their relationship is the inheritance relationship. Xiaobian here is a Jav ...

Previously, through the investigation of various textbooks, papers and blogs, we finally have a macro-understanding of visual SLAM, extracting and summarizing a number of feature extraction and tracking algorithms, and finally the preliminary scheme decided to study ORB-SLAM. Take the time to remediate C++, configure the OpenCV3 ...

I. Mass insertion of data MyISAM table insertion optimization, insertion before closing index updates. alter table xxx DISABLE KEYS; -- Turn off index updates ... -- insert data alter table xxx ENABLE KEYS; Insertion optimization of InnoDB tables: 1) The imported data is arranged according to the p ...

0x000 overview Recently, we have started to learn the basic aspects of computer, such as the principles of computer composition, network, compilation and so on. At present, we are just learning the principles of compilation and are beginning to be interested in it. However, the study of theory is a bit dull and boring. We have decided to change ...

redis is an advanced key:value storage system where value supports five data types: 1. strings 2. lists of strings 3. String sets 4. Ordered string sets 5. hashes There are a few points to remind you about key: 1. Keys should not be too long, try not to exceed 1024 bytes, which not only consumes memory, but also redu ...

Three-step installation of kubernetes cluster What is a batch task? In deep learning, there are many tasks of multi-machine and multi-card, that is to say, colleagues will have multiple pods, but these pods belong to the same task. So there's a problem. A task starts with 100 pods, each pod needs a card, a total of 100 GPU cards, while there ar ...

Content of this article Use of Elves Use of Rect Class Realize the movement and rotation of a tank Effect demonstration Add a static tank We already know how to create a game window, set up background pictures, and let the game program respond to keyboards and mice. Then we need to add an elf to the game. Elves are a co ...

Common methods: Lists, tuples, dictionaries and strings can be used together. Python built-in functions Listing of built-in functions function describe Remarks len(item) Calculate the number of elements in the container del(item) Delete variables del has two methods max(item) Returns the maximum value of the element in the container I ...

From Method to Lambda Then the last Predicate, let's go ahead and see if we continue to simplify the code. It's useful to pass methods as values, but it's a bit annoying if there are a lot of things like isHeavyApple and isGreenApple that might define a bunch of methods only once or twice. To solve this problem, Java 8 introduces a new notation ...