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Convert base class to derived class [duplicate]

...onstructor for my derived classes that accept a base class object as a parameter and copy over the property values. I don't really like this idea, so I'd like to avoid it if possible. ...
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Use of 'use utf8;' gives me 'Wide character in print'

...map { ord } split //, "鸡\n";' 40481:10 By default, Perl's IO layer assumes that it is working with single-byte characters. So when you try to print a multi-byte character, Perl thinks that something is wrong and gives you a warning. As ever, you can get more explanation for this error by includi...
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Updating and committing only a file's permissions using git version control

Just turned an some.sh file into an executable ( chmod 755 ... ), the permissions were updated but not the content. Is there a way to commit the file into git, so that the executable bit will be restored/set on clone / checkout / pull ? ...
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Removing white space around a saved image in matplotlib

I need to take an image and save it after some process. The figure looks fine when I display it, but after saving the figure, I got some white space around the saved image. I have tried the 'tight' option for savefig method, did not work either. The code: ...
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OwinStartup not firing

...exactly what I did to get it to stop working and am having a really hard time figuring it out. 21 Answers ...
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Mac SQLite editor [closed]

... Unless I'm missing something, it doesn't allow you to alter existing tables. – mahdaeng Dec 12 '11 at 20:54 1 ...
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Fluent and Query Expression — Is there any benefit(s) of one over other?

LINQ is one of the greatest improvements to .NET since generics and it saves me tons of time, and lines of code. However, the fluent syntax seems to come much more natural to me than the query expression syntax. ...
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How do I remove packages installed with Python's easy_install?

Python's easy_install makes installing new packages extremely convenient. However, as far as I can tell, it doesn't implement the other common features of a dependency manager - listing and removing installed packages. ...
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NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream

...uest, so it responds with an error. Just include and increase proxy_read_timeout in location config block. Same thing happened to me and I used 1 hour timeout for an internal app at work: proxy_read_timeout 3600; With this, NGINX will wait for an hour (3600s) for its upstream to return something....
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How to draw a line in android

... if i want add a line in some other activity like R.layout.main How can i add? – mohan Sep 1 '10 at 13:42 1 ...