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What's an easy way to read random line from a file in Unix command line?
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sort -R <<< $'1\n1\n2' | head -1 is as likely to return 1 and 2, because sort -R sorts duplicate lines together. The same applies to sort -Ru, because it removes duplicate lines.
– Lri
Sep 15 '12 at 11:...
NumPy array initialization (fill with identical values)
... all take about the same time on my machine (with no caching: %timeit -r1 -n1 …) (NumPy 1.11.2).
– Eric O Lebigot
Oct 8 '16 at 9:40
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Moving decimal places over in a double
...in general what numbers can be exactly represented in a base.
For base=p1^n1*p2^n2... you can represent any N where N=n*p1^m1*p2^m2.
Let base=14=2^1*7^1... you can represent 1/7 1/14 1/28 1/49 but not 1/3
I know about financial software -- I converted Ticketmaster's financial reports from VAX asm...
What does %~d0 mean in a Windows batch file?
...xpands %1 to a drive letter only
%~p1 - expands %1 to a path only
%~n1 - expands %1 to a file name only
%~x1 - expands %1 to a file extension only
%~s1 - expanded path contains short names only
%~a1 - expands %1 to file attributes
%~t1 - expands %1 to date/t...
Can I use break to exit multiple nested 'for' loops?
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Just to add an explicit answer using lambdas:
for (int i = 0; i < n1; ++i) {
[&] {
for (int j = 0; j < n2; ++j) {
for (int k = 0; k < n3; ++k) {
return; // yay we're breaking out of 2 loops here
}
}
}();
}
Of course this pattern ha...
Include headers when using SELECT INTO OUTFILE?
...nd paste that into your UNION statement instead of manually typing in column1, column2, etc when using Joe's method (the accepted answer) so you can get the list of columns quicker!
– Andrew T
Oct 5 '15 at 1:10
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App Inventor 2 数据可视化教程 - 折线图/曲线图/实时数据绘图 · App Inventor 2 中文网
... Q1：Chart 组件的最低版本要求？
Q2：折线图可以显示多少个数据点？
Q3：如何实现折线图的 X 轴显示时间？
Q4：如何保存图表数据？
Q5：折线图和面积图的区别？
Q6：如何实现动态切换图表类型？
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What Process is using all of my disk IO
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For small writes all I saw was [jdb2/nvme0n1p1] in iotop, but I got lucky with enabling /proc/sys/vm/block_dump and comparing the output to a healthy/stable system lxadm.com/Simple_filesystem_read/write_tracing_with_/proc/sys/… It helped find a docker container tha...
How to change facet labels?
...sion (on CRAN!) I don't seem to have the function.
– n1k31t4
Jan 25 '16 at 5:40
6
This is cool. W...
Activate a virtualenv via fabric as deploy user
... still the best and most clean answer here
– n1_
Nov 26 '16 at 13:53
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