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How does this giant regex work?

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undefined reference to `WinMain@16'

When I try to build a program using Eclipse CDT , I get the following: 6 Answers 6 ...
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Difference between single and double square brackets in Bash

I'm reading bash examples about if but some examples are written with single square brackets: 6 Answers ...
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...全不操作后端的任何数据, 仅仅只是对用户的下单操作log),这种业务,只需要在内存cache中放好可秒杀的数量,还可以把数据分布开来放,100商品,10台服务器一台放10个,无需在当时操作任何数据库。可以订单数够后,停止...
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Collections.emptyMap() vs new HashMap()

What are some of the situations where I can use Collections.emptyMap() ? The Documentation says I can use this method if I want my collection to be immutable. ...
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get dictionary key by value

How do I get a Dictionary key by value in C#? 8 Answers 8 ...
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How do I use vimdiff to resolve a git merge conflict?

...; fix conflicts and then commit the result. Now I ran git mergetool and vimdiff opened with the image below. I don't know how to use vimdiff. What does each panel here mean and how should I proceed to fix the merge conflict? ...
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How to detect if a variable is an array

What is the best de-facto standard cross-browser method to determine if a variable in JavaScript is an array or not? 12 Ans...
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Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?

I have seen few py scripts which use this at the top of the script. In what cases one should use it? 4 Answers ...
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Batch file to copy files from one folder to another folder

I have a storage folder on a network in which all users will store their active data on a server. Now that server is going to be replaced by a new one due to place problem so I need to copy sub folders files from the old server storage folder to new server storage folder. I have below ex: ...