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Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...固定的工作线程相结合的工作队列，它使用 wait() 和 notify() 来通知等待线程新的工作已经到达了。该工作队列通常被实现成具有相关监视器对象的某种链表。清单 1 显示了简单的合用工作队列的示例。尽管 Thread API 没有对使用 Ru...
Getting vertical gridlines to appear in line plot in matplotlib
I want to get both horizontal and vertical grid lines on my plot but only the horizontal grid lines are appearing by default. I am using a pandas.DataFrame from an sql query in python to generate a line plot with dates on the x-axis. I'm not sure why they do not appear on the dates and I have trie...
Does uninstalling a package with “pip” also remove the dependent packages?
When you use pip to install a package, all the required packages will also be installed with it (dependencies). Does uninstalling that package also remove the dependent packages?
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Is JavaScript an untyped language?
I've found that some people call JavaScript a "dynamically, weakly typed" language, but some even say "untyped"? Which is it really?
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Constructors in JavaScript objects
Can JavaScript classes/objects have constructors? How are they created?
19 Answers
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Python's equivalent of && (logical-and) in an if-statement
Here's my code:
10 Answers
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How to Rotate a UIImage 90 degrees?
...geOrientationUp (portrait) that I would like to rotate counter-clockwise by 90 degrees (to landscape). I don't want to use a CGAffineTransform . I want the pixels of the UIImage to actually shift position. I am using a block of code (shown below) originally intended to resize a UIImage to do t...
How to disable GCC warnings for a few lines of code
...possible to use #pragma warning (disable: ...) . Also I found that in GCC you can override per file compiler flags . How can I do this for "next line", or with push/pop semantics around areas of code using GCC?
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What is an xs:NCName type and when should it be used?
I ran one of my xml files through a schema generator and everything generated was what was expected, with the exception of one node:
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Center a map in d3 given a geoJSON object
Currently in d3 if you have a geoJSON object that you are going to draw you have to scale it and translate it in order to get it to the size that one wants and translate it in order to center it. This is a very tedious task of trial and error, and I was wondering if anyone knew a better way to obtai...