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Most tricky/useful commands for gdb debugger [closed]
... through frames
watch: Suspend the process when a certain condition is met
set print pretty on: Prints out prettily formatted C source code
set logging on: Log debugging session to show to others for support
set print array on: Pretty array printing
finish: Continue till end of function
enable and d...
Sample random rows in dataframe
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Remember to set your seed (e.g. set.seed(42) ) every time you want to reproduce that specific sample.
– CousinCocaine
Apr 10 '14 at 8:47
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Simple way to transpose columns and rows in SQL?
...TH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query
= 'select name, '+@colsPivot+'
from
(
select color, name, value
from yourtable
unpivot
(
value for name in ('+@colsUnpivot+')
) unpiv
) src
...
Git - Difference Between 'assume-unchanged' and 'skip-worktree'
...ng the application on a server, but I want to build locally with different settings. Naturally, the file always shows up when i do 'git status' as something to be staged. I would like to hide this particular change and not commit it. I won't make any other changes to the file.
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How to set commands output as a variable in a batch file
Is it possible to set a statement's output of a batch file to a variable, for example:
7 Answers
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How can I make my flexbox layout take 100% vertical space?
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You should set height of html, body, .wrapper to 100% (in order to inherit full height) and then just set a flex value greater than 1 to .row3 and not on the others.
.wrapper, html, body {
height: 100%;
margin: 0;
}
.wrapper...
How to use XPath contains() here?
...n the and condition will fail. So and condition returns false on the empty set, is it correct?
– Konstantin Milyutin
Jan 27 '14 at 14:27
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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...程如下所示：
（1）使用copy_from_user从用户空间拷贝fd_set到内核空间
（2）注册回调函数__pollwait
（3）遍历所有fd，调用其对应的poll方法（对于socket，这个poll方法是sock_poll，sock_poll根据情况会调用到tcp_poll,udp_poll或者datagram_poll...
Maximum concurrent Socket.IO connections
...-1800 connections? I am having the identical issue, and my file limits are set to 100,000, so I know that is not the issue. Any help would be greatly appreciated. Thank you.
– Seth
Oct 1 '15 at 14:11
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plot with custom text for x axis points
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You can manually set xticks (and yticks) using pyplot.xticks:
import matplotlib.pyplot as plt
import numpy as np
x = np.array([0,1,2,3])
y = np.array([20,21,22,23])
my_xticks = ['John','Arnold','Mavis','Matt']
plt.xticks(x, my_xticks)
plt.p...