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Summary of common categories (I) Object: java.lang.Object Object:Java All classes in (custom class, class provided by jdk) inherit from object (all root classes) public int hashCode() returns the hash code value of the object (the hash code value of each object in memory is different). It has a relat ...

/mkconfig file analysis: Six important parameters of mkconfig script: Configure in the main makefile file: x210_sd_config : unconfig #$(@:_ config =) for the target_ config is replaced by "" to get x210_sd @$(MKCONFIG) $(@:_config=) arm s5pc11x x210 samsung s5pc110 #Output TEXT_BASE variab ...

Sword finger offer week 5 incomplete 73. Two numbers that only appear once in the array Except for two numbers in an integer array, other numbers appear twice. Please write a program to find out the two numbers that only appear once. You can assume that these two numbers must exist. Example Input: ...

In this tutorial, we will analyze the internal running mechanism of async/.await in detail. We will use the async STD library instead of tokio, because this is the first t rust library that supports async/.await syntax. The tutorial of async/.await principle analysis is divided into two parts, which is the first part. Blockchain development tu ...

1. switch statement 1.1 branch statement switch statement format switch (expression){ case 1: Statement body 1; break; case 2: Statement body 2; break; ... default: Statement body n+1; break; } Execution process: First calculate the value of the expression Secondly, compare wit ...

From: ape world, address: https://juejin.im/post/5ee9a2e7e51d457423261adb Explain the background Thread pool is still used in daily work. When asynchronous and batch processing tasks are needed, we will define a thread pool to handle them. There are some problems in the process of using thread p ...

Article Directory Tuples, Dictionaries and Collections 1. Tuples 1. What is a tuple 1) Empty tuples: () 2) Tuples of a single element: (element) 3) Tuples of multiple elements: 2. Get the elements in the tuple 1) List of ways to get elements tuple support 2) Other ways (the same applies to lists) ...

Author: little potato biubiubiu Blog Park: https://www.cnblogs.com/HouJiao/ Nuggets: https://juejin.im/user/58c61b4361ff4b005d9e894d The official account of WeChat: the idea of a broken potato (scanning the code, attracting a cat, listening to stories together, learning front-end technology) The content of the author's article comes from his ...

Requests and responses Request object The REST framework introduces a Request object, which extends the ordinary HttpRequest and provides more flexible and clear parsing. The core function of the Request object is request.data Property, which corresponds to the request.POST Similar, but more useful ...

Stream stream experience Requirements: complete the creation and traversal of the collection according to the following requirements Create a collection to store the string elements Store all elements in the collection that begin with "Zhang" into a new collection Store the 3-length elements in the set beginning with "Zhang&quo ...