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ALTER DATABASE failed because a lock could not be placed on database
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10 Answers
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How to get all files under a specific directory in MATLAB?
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130
Update: Given that this post is quite old, and I've modified this utility a lot for my own use d...
Command line for looking at specific port
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305
Here is the easy solution of port finding...
In cmd:
netstat -na | find "8080"
In bash:
ne...
How do I read any request header in PHP
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360
IF: you only need a single header, instead of all headers, the quickest method is:
<?php
// ...
Changing the child element's CSS when the parent is hovered
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edited Mar 20 '14 at 20:24
Jeff B
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离线版启动超时，有报错日志 - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
...ntor\AppInventor2\resources\app.asar.unpacked, --disable_update_check, -a, 0.0.0.0, -p, 8088, D:\appinventor\AppInventor2\resources\app.asar.unpacked\Web]
Picked up JAVA_TOOL_OPTIONS: "-Dfile.encoding=UTF-8"
May 08, 2025 9:40:04 AM com.google.appengine.init.AppEngineWebXmlInitialParse <...
socket.shutdown vs socket.close
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40
Here's one explanation:
Once a socket is no longer required,
the calling program can disca...
Converting a Pandas GroupBy output from Series to DataFrame
...dex, though:
In [19]: type(g1)
Out[19]: pandas.core.frame.DataFrame
In [20]: g1.index
Out[20]:
MultiIndex([('Alice', 'Seattle'), ('Bob', 'Seattle'), ('Mallory', 'Portland'),
('Mallory', 'Seattle')], dtype=object)
Perhaps you want something like this?
In [21]: g1.add_suffix('_Count').res...
.gitignore all the .DS_Store files in every folder and subfolder
...ore from the current directory. You can use
find . -name .DS_Store -print0 | xargs -0 git rm --ignore-unmatch
to remove all .DS_Stores from the repository.
Felt tip: Since you probably never want to include .DS_Store files, make a global rule. First, make a global .gitignore file somewhere, e....