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Day 19 884 unusual words in two sentences A sentence is a string of words separated by spaces. Each word consists of only lowercase letters. If a word happens to appear once in one sentence but does not appear in the other sentence, the word is not common. Give you two sentences s1 and s2 and return a list of all the infrequently used words ...

This article is a summary of the author's notes in the process of learning C language. It will briefly describe the basic knowledge of C language. The content is clear and easy to understand. I believe you can easily learn the basic knowledge of C language. At the same time, I hope this article will help you. I believe you will succeed. Now let ...

Author: Attention 🐴 Github: Github Nuggets: Go in and have a look 🐴 Hobbies: Americano More Ice! An inside volume note about Typescript Typescript brief introductioninstallWrite the first demoBasics Raw data type Boolean valuenumerical valuecharacter stringNull value Arbitrary valuetype inference Union typeObject type - In ...

Chapter 7 C language functions 7.1 what is a function? concept We encapsulate (package) the commonly used code into an independent module in a fixed format. As long as we know the name of this module, we can reuse it. This module is called Function. Explain the encapsulation of the function and some precautions with the function of comp ...

1. Design background Recently, some users have put forward the need to implement a set of video learning module and online examination module in the original website. Here, I will first introduce the design idea of the following online examination module. To realize an online examination system with basic functions, the following elements are ...

Have you distinguished Iterable, iterator and generator? What are they, what is the relationship between them, what are their uses and how to create them? This article explains in detail one by one Iteratable Any object that can be iterated is iterable. In short, the objects that can be used in for loop are, for example: All sequence types a ...

Basic concepts of pointer What is the address Address in life: Memory address: Address and data in memory unit are two completely different concepts The address is like the room number. According to this number, we can find the corresponding roomMemory units are like rooms, which are dedicated to storing data Variable address: The ...

Recently, I used Python and wrote several crawlers to practice. There are many online tutorials, but some can't climb. The main reason is that the website is often changed, but crawlers still have a common idea, that is, downloading data, parsing data and saving data. Let's talk about it. 1. Download data First, open the website to be craw ...

Design mode summary significance The essence of design pattern is the practical application of object-oriented design principles. It is a full understanding of the encapsulation, inheritance and polymorphism of classes, as well as the association and composition of classes Basic elements name Question: the application environment of th ...

Close reading of the source code is the column of appreciating the source code under the horse soldier education. The purpose of our appreciation of the source code is not to show off our skills, but to understand the author's design ideas and extract the essence, so as to write more excellent code. On the other hand, you can also give extra po ...