Tag：character
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Time：2020-7-13
[TOC] Front end and algorithm leetcode 8. String conversion integer (ATOI) Title Description Please implement an ATOI function to convert a string to an integer. First, the function discards the useless beginning space character as needed until the first non space character is found. When the first non empty character we find is a positive […]
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Time：2020-7-13
Source: javaobj Maven deploy Today, when using Maven to publish jar package, the publishing function is normal, and it has been successfully uploaded to the warehouse, that is, the project is running more and more, and the garbled code appears in Chinese { “code”: “SUCCESS”, “success”: true, “Message”: the operation was successful. “, “data”: [ […]
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Time：2020-7-11
Lua is a powerful, lightweight embedded scripting language that can be used by any program you need. Lua does not have the concept of “main” program: it can only be embedded in a host program. The host program can call functions to execute a small section of lua code, read and write Lua variables, and […]
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Time：2020-7-11
Whether the matching string contains a character.For example, it contains the C charactercbde var k =c； var str =”cbde”; var reg =/^c+.*/; var new =reg.test(str) console.log(new) Results: CBDE Now I want to replace c with variable K; Try to use the construction method var kew =’new’ var re =new RegExp(“^key+.*”) var re =new RegExp(“^”+key+”+.*”) console.log(re) […]
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Time：2020-7-11
Topic requirements Consider the string s to be the infinite wraparound string of “abcdefghijklmnopqrstuvwxyz”, so s will look like this: “…zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd….”. Now we have another string p. Your job is to find out how many unique non-empty substrings of p are present in s. In particular, your input is the string p and you need […]
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Time：2020-7-9
Solution of proxy method call in IOS system In the project development, I encountered a very strange problem. Under the Jiugongge keyboard of IOS system,UITextViewControl’s- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)textThe proxy method is called multiple times 1. Demand background What the project needs to achieve [email protected], when the input single character is [email protected] you select […]
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Time：2020-7-9
Basics The full name of heredoc isHere DocumentIn Chinese, it can be calledembed document。 In fact, there are many names for it, such as here document, hereis, here string and so on. Embedded documents are an alternative to shell I / O redirection. We already know that shell I / O redirection is a transfer […]
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Time：2020-7-9
JavaScript regular expression Character matching Metacharacters for common matching characters: .Matches any character except newline. \wMatch letters or numbers or underscores or Chinese characters. \sMatches any whitespace. \dMatch numbers. \WMatch any character that is not a letter, number, underline, or Chinese character. \SMatches any character that is not whitespace. \DMatches any non numeric character. [0-9]and[^abc]They […]
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Time：2020-7-8
At present, automobile ferry is a kind of ferry specially used for transporting cars. Vehicles need to buy “boarding tickets” for vehicles before boarding. However, some owners always evade tickets in order to save money. The traditional way to check tickets is to manually register the license plate number of vehicles, and then check them […]
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Time：2020-7-8
1. Download MySQL 5.7 image docker pull mysql:5.7 2. Create the MySQL container and start it docker run -d -p 3306:3306 -e MYSQL_USER=”ppx” -e MYSQL_PASSWORD=”123456″ -e MYSQL_ROOT_PASSWORD=”123456″ –name mysqltest1 mysql:5.7 –character-set-server=utf8 –collation-server=utf8_general_ci The above parameters are explained -e MYSQL_ User =: set user name -e MYSQL_ Password =: set the password of this user -e […]
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Time：2020-7-8
Ask a question: given a string, please find out the length of the longest substring without repeating characters. Example: “abbcc” — > “ab” or “BC”, “abcadef” — > “ADEF” Solution: using brute force algorithm is easy to implement, but the time complexity is O (n ^ 2). This problem can be completed through a traversal, […]
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Time：2020-7-4
Windows 10 installation and configuration vim8.2 Installing 64 bit VIM When Python installs 64 bit, you must download and install 64 bit VIM, because some plug-ins will use Python DLL. Otherwise, problems may occur. Now everyone’s computer should be 64 bit, we suggest that we unify 64 bit. 64 bit VIM windows download path https://github.com/vim/vim-win32-installer/releaseschoicegvim_8.2***_x64.exe […]
