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How to sort a list/tuple of lists/tuples by the element at a given index?
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10 Answers
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Find indices of elements equal to zero in a NumPy array
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numpy.where() is my favorite.
>>> x = numpy.array([1,0,2,0,3,0,4,5,6,7,8])
>>> numpy.where(x == 0)[0]
array([1, 3, 5])
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Generate random number between two numbers in JavaScript
Is there a way to generate a random number in a specified range (e.g. from 1 to 6: 1, 2, 3, 4, 5, or 6) in JavaScript?
23 A...
What is Weak Head Normal Form?
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These expressions are all in normal form:
42
(2, "hello")
\x -> (x + 1)
These expressions are not in normal form:
1 + 2 -- we could evaluate this to 3
(\x -> x + 1) 2 -- we could apply the function
"he" ++ "llo" -- we could apply the (++)
(1 + 1, 2 + 2) ...
项目管理实践教程一、工欲善其事，必先利其器【Basic Tools】 - 项目管理 -...
...首先安装一些必须的软件，主要有下面的4个，其中软件1和2使用在服务器机上，软件3和4安装在客户端机上。另外，我们还有用到MSBui 今天，我们首先安装一些必须的软件，主要有下面的4个，其中软件1和2使用在服务器机上，...
How do I find a “gap” in running counter with SQL?
...gap" in a counter column in an SQL table. For example, if there are values 1,2,4 and 5 I'd like to find out 3.
20 Answers
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Why do Lua arrays(tables) start at 1 instead of 0?
...ionale behind the decision of this part of Lua. Why does indexing start at 1? I have read (as many others did) this great paper . It seems to me a strange corner of a language that is very pleasant to learn and program. Don't get me wrong, Lua is just great but there has to be an explanation somewh...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...堆排序(HeapSort)，插入排序(InsertSort)，希尔排序(ShellSort) 1、选择排序(SelectSort)
/************************************
* 简单选择排序
* 稳定排序，O{n^2} ~ O{n^2}
* 从首位开始，循环一次找出一个比首位小的值，交换
*
* https://www.tsi...
How can I setup & run PhantomJS on Ubuntu?
...ntomJS and recorded it to video: https://www.dailymotion.com/video/xnizmh_1_webcam
25 Answers
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Dynamically select data frame columns using $ and a character value
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185
You can't do that kind of subsetting with $. In the source code (R/src/main/subset.c) it state...