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How does Java Garbage Collection work with Circular References?
... if they aren't reachable through a chain starting at a garbage collection root, so these objects will be collected. Even though objects may point to each other to form a cycle, they're still garbage if they're cut off from the root.
See the section on unreachable objects in Appendix A: The Truth ...
Android Debug Bridge (adb) device - no permissions [duplicate]
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Giving adb root access by default bothers me, especially since all devices do not need adb to as root. To make things easier you can create a bash script and run that with sudo
– Leon
May 10 '13 at...
Having links relative to root?
Is there a way to have all links on a page be relative to the root directory?
6 Answers
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Is there a way for non-root processes to bind to “privileged” ports on Linux?
...recent kernel, it is indeed possible to use this to start a service as non-root but bind low ports. The short answer is that you do:
setcap 'cap_net_bind_service=+ep' /path/to/program
And then anytime program is executed thereafter it will have the CAP_NET_BIND_SERVICE capability. setcap is in th...
Django CharField vs TextField
...nce among these three types", but AFAIK there are some differences in e.g. MySQL, so this is something to keep in mind.
A good rule of thumb is that you use CharField when you need to limit the maximum length, TextField otherwise.
This is not really Django-specific, also.
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Batch file to delete files older than N days
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I used this syntax on Win Server 2008: forfiles /P "C:\Mysql_backup" /S /M *.sql /D -30 /C "cmd /c del @PATH"
– jman
Apr 18 '11 at 8:42
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
I am using Apache/PHP/MySQL stack.
Using as framework CakePHP.
3 Answers
3
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Add a column to existing table and uniquely number them on MS SQL Server
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It would help if you posted what SQL database you're using. For MySQL you probably want auto_increment:
ALTER TABLE tableName ADD id MEDIUMINT NOT NULL AUTO_INCREMENT KEY
Not sure if this applies the values retroactively though. If it doesn't you should just be able to iterate over you...
How to normalize a path in PowerShell?
...-) FWIW, even the built-in Test-Path <path> -IsValid fails on paths rooted in drives that don't exist.
– Keith Hill
Feb 13 '11 at 3:42
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Combine --user with --prefix error with setup.py install
...ote that keeping this file like this will make Python think that / is your root python library directory, leading to confusing issues if you try to install other new packages.
– rogueleaderr
Feb 11 '14 at 20:45
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