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What is the difference between Ruby 1.8 and Ruby 1.9

... Sam's slides. The slideshow is less overwhelming to review, but having it all laid out in a list like this is also helpful. Ruby 1.9 - Major Features Performance Threads/Fibers Encoding/Unicode gems is (mostly) built-in now if statements do not introduce scope in Ruby. What's changed? Single ...
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How do I install from a local cache with pip?

I install a lot of the same packages in different virtualenv environments. Is there a way that I can download a package once and then have pip install from a local cache? ...
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How can I convert an RGB image into grayscale in Python?

... SciPy's image I/O is literally PIL/Pillow. Hence, testing SciPy is effectively retesting PIL/Pillow with negligible overhead introduced by SciPy's wrapper functions. It would have been much more useful to substitute OpenCV (which does not leverage PIL...
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PHP global in functions

...ngletons, registries, constants). You do not want to use them. A function call should not have to rely on anything outside, e.g. function fn() { global $foo; // never ever use that $a = SOME_CONSTANT // do not use that $b = Foo::SOME_CONSTANT; // do not use that unl...
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How do I capture the output into a variable from an external process in PowerShell?

...nd cannot get it to work. Is "Shell" a powershell keyword? So we don't actually use the Start-Process cmdlet? Can you please give a concrete example please (i.e. replace "Shell" and/or "command" with a real example). – deadlydog Feb 22 '13 at 23:45 ...
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Close and Dispose - which to call?

...and Dispose in the case of SqlConnectionObject is: An application can call Close more than one time. No exception is generated. If you called Dispose method SqlConnection object state will be reset. If you try to call any method on disposed SqlConnection object, you will receive...
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How do you check whether a number is divisible by another number (Python)?

... @Chris_Rands Put that into an answer, people who do code-golf (like me) would be very happy. In fact, I came here looking for a golfed answer like that. – MilkyWay90 Nov 11 '18 at 22:29 ...
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How to colorize diff on the command line?

...n for (I want grep --color-like diff output). – i336_ Jul 15 '17 at 4:36 @i336_ no updates unfortunately, if I get an...
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How to spyOn a value property (rather than a method) with Jasmine

...ue as needed. const spy = spyOnProperty(myObj, 'myGetterName', 'get').and.callThrough(); // Call the real thing. Here's the line in the github source code where this method is available if you are interested. https://github.com/jasmine/jasmine/blob/7f8f2b5e7a7af70d7f6b629331eb6fe0a7cb9279/src/cor...
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Error starting jboss server

...tion. Did you change your JRE version when you reinstalled, say from 1.6.0_17 to _18? Anyway, the workaround is described in the JIRA issue, and also here. You need to change the content of conf/bootstrap/profile.xml. Look for the definition of the AttachmentStore, and change the constructor line ...