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This article lists some of the less common Web API s, which contain a lot of content, so the content of compatibility will not appear in this article, you can consult them by yourself. The following cases can match the motion map as much as I can, in order to avoid the content is dry and tedious, but if the content is wrong, please spray or cor ...

Tree problems can usually be solved by recursion. The essence of recursion process is stack, so recursion can also be solved by cyclic stacking (or queue) in theory. On Recursion Recursion is very easy to confuse people's thinking. It's very useful ...

1. Project Background I need to receive the location information of the GPS device through UDP. The data package structure defined by the manufacturer is roughly as follows: Packet header: describe Number of bytes Command flag 2 version num ...

I. The concept and structure of heap If there is a set of key codes K = k0, k1, k2,... kn-1} stores all its elements in a one-dimensional array in the order of a complete binary tree, and satisfies: Ki <= K2i+1 and Ki <= K2i+2 (Ki >= K2i+ ...

Introduction: The so-called child window is a window in a parent window, which is also called the main window. Sub-window is also a window, it has its own callback function, its own window class, its own creation. It is located in an area of the main ...

1. @KafkaListener message listening springboot Kafka uses the @KafkaListener annotation to listen for consumer messages. Message listening can be divided into two types: single data consumption and batch consumption. The difference is the number of ...

If you need to reproduce it, please indicate the source: Flutter Learning Notes (21) --TextField Text Box Component and Card Card Component Today, let's learn about the TextField text box and Card card components. As long as the application is interactive, almost all applications will have username, password input box, search box and so on. W ...

Index and Slice of Array Index of multidimensional arrays 1 import numpy as np 2 arr=np.arange(1,25).reshape(2,3,4) 3 arr 4 # output array([[[ 1, 2, 3, 4], 5 [ 5, 6, 7, 8], 6 [ 9, 10, 11, 12]], 7 8 [[13, 14, 15, 16], 9 [17, 18, 19, 20], 10 [21, 22 ...

I. 01 knapsack problem Concept: Every item can be taken only once Solution: See if the last item can go into the backpackMaximum type problem n items, known the weight of each item, backpack can bear the weight w, to find the maximum weight can be lo ...

FTL Basic Grammar 1. Character output 2. Date Output 3. Digital Output (Take Digital 20 as an Example) 4. Declarative variables 5. COMPARISON OPERATOR 6. Arithmetic Operators 7. Logical Operators 8. Operator priorities in FreeMarker are as follows ...