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c++ - Non-const reference bound to temporary, Visual Studio bug?

I ran into this while compiling some portable code in gcc. Basically this strange code compiles in ... will complain. Quite contradictory behavior. Thoughts? Question&Answers:os...

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

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Why does Java have transient fields?

Why does Java have transient fields? Question&Answers:os...

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Can I recover a branch after its deletion in Git?

If I run git branch -d XYZ, is there a way to recover the branch? Is there a way to go back as if I didn't run the delete branch command? Question&Answers:os...

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

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python - What does functools.wraps do?

In a comment on this answer to another question, someone said that they weren't sure what functools.wraps ... reference: what does functools.wraps do, exactly? Question&Answers:os...

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

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python - How to serialize SqlAlchemy result to JSON?

Django has some good automatic serialization of ORM models returned from DB to JSON format. How to serialize SQLAlchemy ... JQGrid http://www.trirand.com/blog/) Question&Answers:os...

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

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regex - Regular expressions in C: examples?

I'm after some simple examples and best practices of how to use regular expressions in ANSI C. man regex.h does not provide that much help. Question&Answers:os...

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c++ - What is a "span" and when should I use one?

Recently I've gotten suggestions to use span<T>'s in my code, or have seen some answers here on the site which use ... good idea to use it if it's non-standard? Question&Answers:os...

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css - Does "display:none" prevent an image from loading?

Every responsive website development tutorial recommends using the display:none CSS property to hide content from ... unnecessary content on mobile browsers? Question&Answers:os...

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mysql - Ordering by the order of values in a SQL IN() clause

I am wondering if there is away (possibly a better way) to order by the order of the values in an IN() ... noted what options there are for other DBs as well. Question&Answers:os...

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What's a good Java, curses-like, library for terminal applications?

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How to update two tables in one statement in SQL Server 2005?

I want to update two tables in one go. How do I do that in SQL Server 2005? UPDATE Table1, Table2 SET Table1.LastName=' ... T1.id = T2.id AND T1.id = '010008' Question&Answers:os...

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python - Convert binary to ASCII and vice versa

Using this code to take a string and convert it to binary: bin(reduce(lambda x, y: 256*x+y, (ord(c ... or some other way. Really looking for something simpler. Question&Answers:os...

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python - What is the difference between images in 'P' and 'L' mode in PIL?

According to https://pillow.readthedocs.io/en/3.1.x/handbook/concepts.html#concept-modes, What are the difference ... are the examples of image for both mode? Question&Answers:os...

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r - How can I remove all duplicates so that NONE are left in a data frame?

There is a similar question for PHP, but I'm working with R and am unable to translate the solution to my problem ... to 100 rows) where this gets a bit tricky. Question&Answers:os...

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r - Expand ranges defined by "from" and "to" columns

I have a data frame containing "name" of U.S. Presidents, the years when they start and end in office, ("from" and " ... (from, to) : 'from' must be of length 1 Question&Answers:os...

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java - Bringing JFileChooser on top of all windows

I seem to have a problem with my very simple implementation of a file chooser dialogue that requires me to minimize ... can set in order to solve the problem? Question&Answers:os...

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javascript - What is console.log?

What is the use of console.log? Please explain how to use it in JavaScript, with a code example. Question&Answers:os...

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mysql - How can i list has same id data with while loop in PHP?

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

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How to run a cron job inside a docker container?

I am trying to run a cronjob inside a docker container that invokes a shell script. Yesterday I have been ... that invokes a shell script at given interval. Question&Answers:os...

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ios - iPhone Data Usage Tracking/Monitoring

I've searched over this topic but found very few details which were helpful. With these details I've ... instead of sockaddr_dl). This crashes the application. Question&Answers:os...

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mysql - 'IF' in 'SELECT' statement - choose output value based on column values

SELECT id, amount FROM report I need amount to be amount if report.type='P' and -amount if report.type='N'. How do I add this to the above query? Question&Answers:os...

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Android toolbar center title and custom font

I'm trying to figure out the right way to use a custom font for the toolbar title, and center it in the ... do that? Using the new Toolbar as my ActionBar. Question&Answers:os...

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CSS text-overflow in a table cell?

I want to use CSS text-overflow in a table cell, such that if the text is too long to fit on one line, it ... multiple lines when it hits the edge of the cell. Question&Answers:os...

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pointers - Arrow operator (->) usage in C

I am reading a book called "Teach Yourself C in 21 Days" (I have already learned Java and C# so I am ... Could I please get an explanation and a code sample? Question&Answers:os...

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php - Multiple returns from a function

Is it possible to have a function with two returns like this: function test($testvar) { // Do something return ... I be able to get each return separately? Question&Answers:os...

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javascript - Trying to detect browser close event

I have tried many methods to detect browser close event through jQuery or JavaScript. But, unfortunately, I ... window close, unload, or beforeunload events? Question&Answers:os...

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Determining Referer in PHP

What is the most reliable and secure way to determine what page either sent, or called (via AJAX), the current ... is being called from a page on my website. Question&Answers:os...

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python - Pip error: Microsoft Visual C++ 14.0 is required

I just ran the following command: pip install -U steem and the installation worked well until it ... Users***N~1AppDataLocalTemppip-build- k6flhu5kp ycrypto Question&Answers:os...

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

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