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information schema - How can I find all the tables in MySQL with specific column names in them?

I have 2-3 different column names that I want to look up in the entire database and list out all tables which have those columns. Is there any easy script? Question&Answers:os...

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algorithm - How to determine the longest increasing subsequence using dynamic programming?

I have a set of integers. I want to find the longest increasing subsequence of that set using dynamic programming. Question&Answers:os...

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How do you select a particular option in a SELECT element in jQuery?

If you know the Index, Value or Text. also if you don't have an ID for a direct reference. This, this and this ... ="SEL2">Selection 2</option> </select> </div> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why use @PostConstruct?

In a managed bean, @PostConstruct is called after the regular Java object constructor. Why would I use ... , instead of the regular constructor itself? Question&Answers:os...

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java - How to extract a substring using regex

I have a string that has two single quotes in it, the ' character. In between the single quotes is the data I ... "some string with 'the data i want' inside"; Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to copy Docker images from one host to another without using a repository

How do I transfer a Docker image from one machine to another one without using a repository, no matter private ... commands I can use? Or another solution? Question&Answers:os...

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c# - What is the difference between asynchronous programming and multithreading?

I thought that they were basically the same thing - writing programs that split tasks between processors (on machines ... in the body of the above function.) Question&Answers:os...

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html - How do I disable the resizable property of a textarea?

I want to disable the resizable property of a textarea. Currently, I can resize a textarea by clicking on the ... dragging the mouse. How can I disable this? Question&Answers:os...

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Using boolean values in C

C doesn't have any built-in boolean types. What's the best way to use them in C? Question&Answers:os...

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algorithm - Find a pair of elements from an array whose sum equals a given number

Given array of n integers and given a number X, find all the unique pairs of elements (a,b), whose summation is equal to X. The ... << ")" << endl; j--; } } } Question&Answers:os...

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python - Using pip behind a proxy with CNTLM

I am trying to use pip behind a proxy at work. One of the answers from this post suggested using CNTLM. I ... credentials to put in. The ones from cntlm.ini? Question&Answers:os...

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android - Show Image View from file path?

I need to show an image by using the file name only, not from the resource id. ImageView imgView = new ImageView( ... image from the file. How can I do this? Question&Answers:os...

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Is it possible to use jQuery .on and hover?

I have a <ul> that is populated with javascript after the initial page load. I'm currently using .bind with mouseover ... why I'm using on and not just hover. Question&Answers:os...

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.net - Choosing between MEF and MAF (System.AddIn)

The Managed Extensibility Framework (MEF) and Managed AddIn Framework (MAF, aka System.AddIn) seem to accomplish ... would you choose to use both together? Question&Answers:os...

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sql - How to update only one field using Entity Framework?

Here's the table Users UserId UserName Password EmailAddress and the code.. public void ChangePassword(int userId, string ... //code to update the password.. } Question&Answers:os...

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How do you connect localhost in the Android emulator?

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java - How does a ArrayList's contains() method evaluate objects?

Say I create one object and add it to my ArrayList. If I then create another object with exactly the same ... be implemented to have contains() return true? Question&Answers:os...

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Laravel: Display HTML with Blade

I have a string returned to one of my views, like this: $text = '<p><strong>Lorem</strong> ipsum dolor ... Laravel? PS. PHP echo() displays the HTML correctly. Question&Answers:os...

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http headers - How to prevent Browser cache for php site

I have a php site running in cloud server.When ever i add new files css, js or images the browser is ... the same files cached in browser instead of new one Question&Answers:os...

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sql - NULL in MySQL (Performance & Storage)

What exactly does null do performance and storage (space) wise in MySQL? For example: TINYINT: 1 Byte TINYINT w/NULL 1 byte + somehow stores NULL? Question&Answers:os...

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python - Sum the digits of a number

If I want to find the sum of the digits of a number, i.e.: Input: 932 Output: 14, which is (9 + ... , and are there any other methods which are even faster? Question&Answers:os...

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java - Find a line in a file and remove it

I'm looking for a small code snippet that will find a line in file and remove that line (not content but line) ... get file like this: myFile.txt: aaa ccc ddd Question&Answers:os...

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javascript - Is it spread "syntax" or the spread "operator"?

I've heard ... referred to both as 'spread syntax' and 'the spread operator', with the latter being ... , and why? What about array destructuring assignment? Question&Answers:os...

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rust - How do I require a generic type implement an operation like Add, Sub, Mul, or Div in a generic function?

I'm trying to implement a generic function in Rust where the only requirement for the argument is that the ... wrong trait? How can I resolve this? Question&Answers:os...

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c# - Regex.Match whole words

In C#, I want to use a regular expression to match any of these words: string keywords = "(shoes|shirt|pants ... pants. How do I match only those literal words? Question&Answers:os...

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What do these JavaScript bitwise operators do?

x <<= y (x = x << y) x >>= y (x = x >> y) x >>>= y (x = x >>> y) x &= y (x = x & y) x ^= y (x = x ^ y) x |= y (x = x | y) What do these different operators do? Question&Answers:os...

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macos - WebDriverException: 'geckodriver' executable needs to be in PATH even though it is

Trying to get firefox to run using selenium in spyder. My current code is from selenium import webdriver import ... running High Sierra if that's important. Question&Answers:os...

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html - Grid properties not working on elements inside grid container

I'm trying to position a nested li (ul li ul li) on a CSS Grid created on the top-most ul. No love yet (it's not ... ="orgChartLevel2b"> </li> </ul> </li> </ul> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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