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Python concatenate text files
...people who learn about fileinput are told that it's a way to turn a simple sys.argv (or what's left as args after optparse/etc.) into a big virtual file for trivial scripts, and don't think to use it for anything else (i.e., when the list isn't command-line args). Or they do learn, but then forget...
How should strace be used?
...d out how a program is interacting with the OS. It does this by monitoring system calls and signals.
Uses
Good for when you don't have source code or don't want to be bothered to really go through it.
Also, useful for your own code if you don't feel like opening up GDB, but are just interested in u...
Convert Bitmap to File
I understand that using BitmapFactory can convert a File to a Bitmap, but is there any way to convert a Bitmap image to a File?
...
How do I run all Python unit tests in a directory?
... You can change the last line to ´res = runner.run(suite); sys.exit(0 if res.wasSuccessful() else 1)´ if you want a correct exit code
– Sadap
Apr 18 at 8:07
a...
Illegal mix of collations MySQL Error
...e CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
MySQL sneaks swedish in there sometimes for no sensible reason.
share
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Converting XDocument to XmlDocument and vice versa
...as a XmlDocument class.
And I have an XmlDocument variable which I need to convert back to XDocument to append more nodes.
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How to convert a Base64 string into a Bitmap image to show it in a ImageView?
...ory.decodeByteArray(b, 0, b.length); bitmap returns null in my case.how to convert base 64 string to bitmap?
– Rajesh
Dec 12 '15 at 8:26
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Passing two command parameters using a WPF binding
...ers at all to your commands.
However, you could also multi-bind and use a converter to create the parameters:
<Button Content="Zoom" Command="{Binding MyViewModel.ZoomCommand">
<Button.CommandParameter>
<MultiBinding Converter="{StaticResource YourConverter}">
...
How to automatically generate N “distinct” colors?
...is Palette by an MIT student.
Lastly, The following links may be useful in converting between different color systems / coordinates (some colors in the articles are not specified in RGB, for instance):
http://chem8.org/uch/space-55036-do-blog-id-5333.html
https://metacpan.org/pod/Color::Library::D...
转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...var/spool/postfix/etc
postfix/postfix-script: starting the Postfix mail system
A:
chgrp postdrop /var/spool/postfix/maildrop
chgrp postdrop /var/spool/postfix/public
QUOTE:
Q：
[root@mail postfix]# /usr/sbin/postfix start
postfix/postfix-script: warning: ...