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Remove the last line from a file in Bash
...$ d' foo.txt
The -i option does not exist in GNU sed versions older than 3.95, so you have to use it as a filter with a temporary file:
cp foo.txt foo.txt.tmp
sed '$ d' foo.txt.tmp > foo.txt
rm -f foo.txt.tmp
Of course, in that case you could also use head -n -1 instead of sed.
MacOS:
On M...
Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
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javascript function leading bang ! syntax
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edited Aug 30 '14 at 7:27
answered Apr 29 '11 at 3:08
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Preserving signatures of decorated functions
...))
return f(*args, **kwargs)
@args_as_ints
def funny_function(x, y, z=3):
"""Computes x*y + 2*z"""
return x*y + 2*z
print funny_function("3", 4.0, z="5")
# 22
help(funny_function)
# Help on function funny_function in module __main__:
#
# funny_function(x, y, z=3)
# Computes x*y + ...
How to list the contents of a package using YUM?
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438
There is a package called yum-utils that builds on YUM and contains a tool called repoquery tha...
Format date and time in a Windows batch script
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33 Answers
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How to match “any character” in regular expression?
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answered May 26 '10 at 12:31
Delan AzabaniDelan Azabani
70.4k2222 gold badges154154 silver badges189189 bronze badges
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...高可用的mongodb集群：
首先确定各个组件的数量，mongos 3个， config server 3个，数据分3片 shard server 3个，每个shard 有一个副本一个仲裁也就是 3 * 2 = 6 个，总共需要部署15个实例。这些实例可以部署在独立机器也可以部署在一台机...
Better way to set distance between flexbox items
... child and between each child and their parent.
Demo
.upper
{
margin:30px;
display:flex;
flex-direction:row;
width:300px;
height:80px;
border:1px red solid;
padding:5px; /* this */
}
.upper > div
{
flex:1 1 auto;
border:1px red solid;
text-align:center;
margin:5px; /...
Postgres - FATAL: database files are incompatible with server
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413
If you recently upgraded to 11 or 12 from 10.x you can run the below command to upgrade your pos...