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Insert a line at specific line number with sed or awk
...pt file which I need to modify with another script to insert a text at the 8th line.
9 Answers
...
Split a vector into chunks in R
...gt; d
[1] 3 1 11 4 1 2 3 2 4 10 10 2 7 4 6 6 2 1 1 2 3 8 3 10 7 4
[27] 3 4 4 1 1 7 2 4 6 0 5 7 4 6 8 4 7 12 4 6 8 4 2 7 6 5
[53] 4 5 4 5 5 8 7 7 7 6 2 4 3 3 8 11 6 6 1 8 4
> max <- 20
> x <- seq_along(d)
> d1 <- sp...
Remove all the elements that occur in one list from another
...
Trilarion
8,77699 gold badges5050 silver badges8888 bronze badges
answered Nov 18 '10 at 2:48
DonutDonut
...
Transpose list of lists
...
How about
map(list, zip(*l))
--> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
For python 3.x users can use
list(map(list, zip(*l)))
Explanation:
There are two things we need to know to understand what's going on:
The signature of zip: zip(*iterables) This means zip expects an arb...
How do I make a matrix from a list of vectors in R?
...
[6,] 6 1 2 3 4 5
[7,] 7 1 2 3 4 5
[8,] 8 1 2 3 4 5
[9,] 9 1 2 3 4 5
[10,] 10 1 2 3 4 5
share
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improve ...
Why does [5,6,8,7][1,2] = 8 in JavaScript?
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388
[1,2,3,4,5,6][1,2,3];
^ ^
| |
array + — array subscript...
Getting key with maximum value in dictionary?
... |
edited Feb 22 '18 at 17:51
Priyanka Chaudhary
63044 silver badges1111 bronze badges
answered N...
Version of SQLite used in Android?
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482
UPDATE OCT 2016: Here is a link to the updated official docs which includes the main points in ...
Replace values in list using Python [duplicate]
...want, but it doesn't actually save time:
items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for index, item in enumerate(items):
if not (item % 2):
items[index] = None
Here are (Python 3.6.3) timings demonstrating the non-timesave:
In [1]: %%timeit
...: items = [0, 1, 2, 3, 4, 5, 6, 7, 8,...
莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
...、文件系统、管道 133
第五部分 面向字符的特殊文件 181
下篇 莱昂氏UNIX源代码分析
前言 207
第1章 绪论 209
1.1 UNIX操作系统 209
1.2 公用程序 209
1.3 其他文档 210
1.4 UNIX程序员手册 210
1.5 UNIX文档 211
1.6 UNIX操作系...