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How to change the output color of echo in Linux

I am trying to print a text in the terminal using echo command. 30 Answers 30 ...
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What are copy elision and return value optimization?

...to a copy or move constructor is elided, that constructor must still exist and must be accessible. This ensures that copy elision does not allow copying objects which are not normally copyable, e.g. because they have a private or deleted copy/move constructor. C++17: As of C++17, Copy Elision is gua...
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What's the best way of scraping data from a website? [closed]

...web scraping framework. Later on you may decide that they are too limiting and you can put together your own stack of libraries but without a lot of scraping experience your design will be much worse than pjscrape or scrapy. Note: I use the terms crawling and scraping basically interchangeable here...
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Auto-expanding layout with Qt-Designer

... of your widget/dialog/window (not the QVBoxLayout, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized. ...
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Rails 3.1: Engine vs. Mountable App

Can someone help me understand the differences between a Rails Engine and a Mountable app? In Rails 3.1, you can create either one with the "rails new plugin ___ " command. ...
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What is the python keyword “with” used for? [duplicate]

...ources (like file streams). It is similar to the using statement in VB.NET and C#. It allows you to ensure that a resource is "cleaned up" when the code that uses it finishes running, even if exceptions are thrown. It provides 'syntactic sugar' for try/finally blocks. From Python Docs: The with sta...
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为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...

...数字计算机性能专门设计、单链路单向通信速率超过2.0GB/s的外部互连设备,都在限制范围内。 2011年10月27日,我国第一台完全采用国产CPU处理器的千万亿次超级计算机——神威蓝光,在国家超级计算济南中心投入使用。 【商...
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iphone - how can i get the height and width of uiimage

... It was strange. I took a photo by camera and supposed its height > width. But the points of width was 1280 and height 720. What's problem with them? – Henry Oct 31 '16 at 0:28 ...
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Verify version of rabbitmq

... sudo rabbitmqctl status and look for line that looks like that: {rabbit,"RabbitMQ","2.6.1"}, share | improve this answer | ...
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Mockito matcher and array of primitives

... I agree with Mutanos and Alecio. Further, one can check as many identical method calls as possible (verifying the subsequent calls in the production code, the order of the verify's does not matter). Here is the code: import static org.mockito.Ad...