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Concatenate strings in Less
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Use Variable Interpolation:
@url: "@{root}@{file}";
Full code:
@root: "../img/";
@file: "test.css";
@url: "@{root}@{file}";
.px{ background-image: url(@url); }
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What is the difference between a directory and a folder?
...ditor I could found two sub-keys, Folder and Directory, under HKEY_CLASSES_ROOT.
I didn't know the difference until I created some values manually in registry and observed the differences of context menu items. If I create a node under HKEY_CLASSES_ROOT\Folder\shell only, I found that it appears in...
How to reset a single table in rails?
...ipes all data and resets the autoincrement counters in the table. Works in MySQL and Postgres, does not work in Sqlite.
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...eb服务器也是会出现大量的TIME_WAIT的情况的。
现在来说如何来解决这个问题，解决思路很简单，就是让服务器能够快速回收和重用那些TIME_WAIT的资源。
下面来看一下我们网管对/etc/sysctl.conf文件的修改：
#对于一个新建连...
Rollback to an old Git commit in a public repo
...nges to the whole tree. You should execute this command in the git project root. If you are in any sub directory, then this command only changes the files in the current directory. Then commit and you should be good.
You can undo this by
git reset --hard
that will delete all modifications from ...
What's the difference between the data structure Tree and Graph?
...recursive pointer-based structure. The representation is not unique for unrooted trees, but that is immaterial.
– j_random_hacker
Jul 7 '14 at 9:42
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PostgreSQL query to list all table names?
...hema.tables
WHERE table_type='BASE TABLE'
AND table_schema='public';
For MySQL you would need table_schema='dbName' and for MSSQL remove that condition.
Notice that "only those tables and views are shown that the current user has access to". Also, if you have access to many databases and want to ...
Is there an S3 policy for limiting access to only see/access one bucket?
...ckets permission is that the recipient of this policy can see all of your (root's) buckets. There is no data disclosure directly, but there might be sensitivity/confusion around bucket names. It is feasible to remove this particular permission and things should still work (although "s3cmd ls" etc wi...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...but not least the sample code from media fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm as root):
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~...
How can I get the current network interface throughput statistics on Linux/UNIX? [closed]
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This assumes root access is available
– Lionel
Nov 7 '11 at 4:18
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