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 ...
Posted by simon551 on Fri, 10 May 2019 17:34:41 +0200
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 ...
Posted by fredi_bieging on Fri, 10 May 2019 13:50:02 +0200
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 ...
Posted by phpnewbie1979 on Thu, 09 May 2019 17:40:05 +0200
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 ...
Posted by blues on Wed, 08 May 2019 20:24:04 +0200
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 ...
Posted by jonnypixel on Wed, 08 May 2019 19:21:05 +0200
redis is an advanced key:value storage system where value supports five data types:
2. lists of strings
3. String sets
4. Ordered string sets
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 ...
Posted by Skawn on Wed, 08 May 2019 18:48:04 +0200
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 ...
Posted by jrobles on Wed, 08 May 2019 14:45:03 +0200
Content of this article
Use of Elves
Use of Rect Class
Realize the movement and rotation of a tank
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 ...
Posted by darkfreaks on Wed, 08 May 2019 13:15:03 +0200
Common methods: Lists, tuples, dictionaries and strings can be used together.
Python built-in functions
Listing of built-in functions
Calculate the number of elements in the container
del has two methods
Returns the maximum value of the element in the container
Posted by flashbot on Wed, 08 May 2019 11:30:03 +0200
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 ...
Posted by Richter on Wed, 08 May 2019 07:25:04 +0200