Tag：Difference
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Time：2021-3-3
As we said earlier, t-test is a test method used to compare whether there is a significant difference between two means. This article introduces the types of t-test and the specific Python implementation code. T-test is to compare the difference between two means. The difference of different kinds of t-test is actually the difference of […]
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Time：2021-3-2
Make a note of the interview questions that you have encountered recently. The companies are not big, so they only pick out some technical problems to record. PHP foundation related: How to compile PHP? Do you know anything about opcode? From the perspective of opcode, can you optimize the speed of PHP? How to implement […]
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Time：2021-2-27
This paper analyzes the difference between get and post mode in Ajax. Share with you for your reference. The specific analysis is as follows: If it is a get mode request, the delivery parameters are sent to the server through the URL address; If the request is in post mode, the delivery parameters are sent […]
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Time：2021-2-25
Input text box, you can use the placeholder property The result is that when the content of the text box is empty, the prompt will be displayed, and when the content is entered, the prompt will disappear The difference between the placeholder and the value attribute is that the value attribute is directly set to […]
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Time：2021-2-21
The time prediction methods we introduced in the last article are basically calculated by directly averaging historical data. This article talks about some methods of forecasting with models. 1. AR (P) model Let’s talk about the first AR model. The full name of AR is auto regression, which means autoregression. We should all know that […]
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Time：2021-2-18
1. Understanding of CSS optimization (e.g. code level) 2. Understanding of ES6 (let const variable / arrow function)/ promise.all Modularization and implementation of concurrent / ES6 node.js Differences in modularity) 3. The principle of jQuery chain call / chain programming 4. Secondary encapsulation of element 5. What kinds of JS inheritance 6. What are the […]
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Time：2021-2-16
Hello everyone, I’m a ruffian Heng. I’m a serious technical ruffian. Today, ruffian Heng introduces to youSuper download algorithm development note (1) is implemented in different cm cores。 Continued from the first chapterRt-ufl-a super download algorithm design for full platform i.mxrtThe project of PI Ziheng open source has been officially launched. PI Ziheng said that […]
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Time：2021-2-15
Link to the original text:Difference Between Object and Dynamic Keyword in C#Difference between var and dynamic in C# Chapter 1 (the difference between dynamic and object) We often see that many C # developers can’t distinguish between object and dynamic variables. I recently tried to find related tutorials and articles on the Internet, but I […]
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Time：2021-2-14
We talked about t test and F test before. In this article, we talk about Q test. Q-test, also known as discard quotient method, is mainly used to judge the suspicious value (abnormal value). For example, we have done several experiments and obtained several observation values: 10.14, 10.12, 10.25, 10.16 and 10.20. We can see […]
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Time：2021-2-13
preface Recently, I have received many private letters from fans, including those who have worked for several years and those who are about to graduate. They all came to tell me that the golden nine silver ten is coming soon. They want to go to interview a wave of big factories and ask me if […]
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Time：2021-2-9
C + + is an intermediate language, which was designed and developed by Bjarne Stroustrup in Bell Labs in 1979. C + + is an object-oriented programming language, which further expands and perfects C language. C + + can run on a variety of platforms, such as windows, Mac operating system and various versions of […]
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Time：2021-2-7
Title Requirements: Thinking: Maintain a res to save the result set, and maintain a mymin to save the current minimum value Traverse the array. If the current element minus mymin is greater than the current res, assign the difference to res. if the current element is smaller than mymin, assign the value of the current […]
