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Remove files from Git commit
...ft HEAD^
or
git reset --soft HEAD~1
Then reset the unwanted files in order to leave them out from the commit:
git reset HEAD path/to/unwanted_file
Now commit again, you can even re-use the same commit message:
git commit -c ORIG_HEAD
...
What's the point of 'const' in the Haskell Prelude?
...
It's useful for passing to higher-order functions when you don't need all their flexibility. For example, the monadic sequence operator >> can be defined in terms of the monadic bind operator as
x >> y = x >>= const y
It's somewhat neater...
Apply pandas function to column to create multiple new columns?
... updating the row directly like this ended up being surprisingly slow - an order of magnitude slower than the apply with 'expand' + pd.concat solutions
– Dmytro Bugayev
Jun 30 at 17:33
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How to Compare Flags in C#?
...al times and got ~500ms for HasFlags and ~32ms for bitwise. While still an order of magnitude faster with bitwise, HasFlags was an order of magnitude down from your test. (Ran the test on a 2.5GHz Core i3 and .NET 4.5)
– MarioVW
Jun 26 '13 at 17:13
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
...s for the presentation, JPA 2.0 for the persistence, Dependency Injection, etc. For a new development, this is IMO a serious option, Java EE 6 is a great stack.
See also
Choosing a Java Web Framework now?
Java - JDBC alternatives
JEE6 vs. Spring 3 stack
What to learn for making Java web applicati...
C read file line by line
...har * line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/etc/motd", "r");
if (fp == NULL)
exit(EXIT_FAILURE);
while ((read = getline(&line, &len, fp)) != -1) {
printf("Retrieved line of length %zu:\n", read);
printf("%s", line);
}
f...
How can I group data with an Angular filter?
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you can use order-by with group-by @erfling, PTAL on: github.com/a8m/angular-filter/wiki/…
– a8m
Jan 14 '16 at 15:55
...
Python: most idiomatic way to convert None to empty string?
... Uses the fact that python treats None, an empty list, an empty string, 0, etc as false. Also uses the fact that the or statement returns the first element that is true or the last element given to the or (or groups of ors). Also this uses lambda functions. I would give you +10 but obviously it ...
Linux下追踪程序退出(崩溃)思路 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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历史命令默认会保存1000条，如果觉得太少，可以修改/etc/profile中HISTSIZE=1000，改成你想要的值。
注意：history只针对登录用户下执行有效，即使root用户也无法得到其它用户histotry历史。当然，还是有办法记录所有登陆用户的...
基于内网外隔离的微信推送解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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端口转发配置
安装rinetd 请自行百度
编辑配置vi /etc/rinetd.conf
启动程序
pkill rinetd ##关闭进程
rinetd -c /etc/rinetd.conf ##启动转发
把这条命令加到/etc/rc.local里面就可以开机自动运行
查看状态
netstat -antup
tomca...