Tag：Original code
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Why do computers use complement codes to store data? Because its love will disappear~
✍ original code I believe many people have learned many ways to convert a decimal number into a binary number in junior high school. For example, we can quickly know that the binary of 10 can be expressed as 1010. But what the junior middle school teacher didn’t tell us is: – 10 how to […]
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[azure Devops series] multi-stage construction of azure Devops
In fact, it is particularly useful for stage pipeline. We can divide construction, test, or deployment into multiple stages for processing. Deploy your application to multiple environments and gradually transition from one environment to another. For example, you can automatically deploy to the dev environment after running unit tests in CI, then deploy to the […]
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7.8k Star！ A powerful JS code obfuscation tool
[introduction]: an open source code obfuscator, which can confuse JS code into code with low readability. brief introduction JavaScript obfuscator is a powerful free JavaScript obfuscator, which contains a variety of functions. It can confuse the code into code with low readability. It looks like hard to read code. In fact, it has the same […]
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Understanding bit operation
Original code, inverse code, complement code In terms of integers, integer data in PHP occupies 8 bytes of memory, that is, 64 bit bits, and each bit is either 0 or 1;We use the first bit on the left as the sign bit, 0 is positive and 1 is negative; Original code: binary converted from […]
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Binary, bit operation, displacement operation
Basic concepts of binary Binary is the carry system of every 2 carry, and 0 and 1 are the basic operators. Modern electronic computer technology uses binary, because it only uses two digital symbols: 0 and 1, which is very simple and convenient and easy to be realized electronically. The information processed inside the computer […]
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Hey! Don’t forget this C language knowledge~ 0 = = – 1 (problem)
Today, I’ll take you to review a forgotten C language knowledge point, the storage of negative numbers and a typical investigation form. Let’s look at a topic first #include int main() { int a,b,c,d; // perhaps int a,b,c,d; a=0x8; b=a>>1; c=~(~0<<1); d=b&c; printf(“c is %d\n”,c); printf(“d is %d\n”,d); } Resolution: Suppose the computer is storing eight […]
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Architecture and operating system
Architecture and operating system Part 1. Architecture foundation 1. Von Neumann architecture All data and instructions processed by computer are represented by binary numbers Sequential execution program In the process of computer operation, the program to be executed and the data to be processed are first stored in the main memory (memory). When the computer […]
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Learn Apollo client Series in 21 minutes: simple construction
Learning Apollo client in 21 minutes is a series, simple violence, package learning and package meeting. Build Apollo client and integrate ReduxUsing Apollo client to get dataModify local Apollo store dataProvide customized solutions Request interception Encapsulation and modification of client APIApollo store storage details Failure analysis and solution of writing to store Adding Apollo to […]
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Error reported by selenium loading Cookie: selenium.common.exceptions.invalidcookie domain exception: Message: invalid cookie domain
In the process of automatic login using selenium, after the cookie has been obtained, an error is still reported: selenium. Common. Exceptions. Invalidcookie domain exception: Message: invalid cookie domain The original code for obtaining and adding a cookie is as follows: #Get cookie dr = webdriver.Chrome(“D:\softwarePro\BrowserDriver\chromedriver.exe”) dr.maximize_window() dr.get(url) c = dr.get_cookie(‘JSESSIONID’) print(c) #Add cookie dr […]
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Original code, inverse code and complement code
1、 Concept explanation Number of machines: The binary representation of a number in a computer is called the machine number of the number. Machine number is signed, in the computer with a number of the highest place to store symbols, 0 represents a positive number, 1 represents a negative number. For example, + 2 binary […]
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Bitcoin data set on kaggle – using Google big query API to process bitcoin data (1)
About kaggle Kaggle is a data contest platform, which was founded in 2010 and acquired by Google in 2017. The platform provides a large number of open data sets and free computing resources. You only need to register an account to write code and analyze data online. Big query bitcoin dataset Dataset home page https://www.kaggle.com/bigque… […]
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Why is int8 in the range of [- 128127]
A series of articles： Why is int8 in the range of [- 128127] Do you really understand sync.Once Is that right Today’s article is very basic. I saw it the other daygoA topic is actually different fromgoIt doesn’t matter much in itself. func main() { What is the value of B? If 128 is said […]