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What blocks Ruby, Python to get Javascript V8 speed? [closed]

...mple, for certain operations, Rubinius's Hash class is faster than YARV's. Now, this doesn't sound terribly exciting until you realize that Rubinius's Hash class is implemented in 100% pure Ruby, while YARV's is implemented in 100% hand-optimized C. So, at least in some cases, Rubinius can generate...
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What's the @ in front of a string in C#?

... Oh my, that sounds annoying... even more glad I'm using C# now :p – Svish Feb 17 '09 at 11:15 You cann...
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The following untracked working tree files would be overwritten by merge, but I don't care

...ith the following: -x ignored files are also removed as well as files unknown to Git. -d remove untracked directories in addition to untracked files. -f is required to force it to run. Here is the link that can be helpful as well. ...
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Why dict.get(key) instead of dict[key]?

...ents anywhere? As mentioned here, It seems that all three approaches now exhibit similar performance (within about 10% of each other), more or less independent of the properties of the list of words. Earlier get was considerably slower, However now the speed is almost comparable along with t...
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What is the reason not to use select *?

...tle differently. Brittle is normally defined as 'breaks easily'. Having unknown or hard-to-find dependencies because each piece of code will use different columns means I can't easily change anything at the data level without full regression .. which seems brittle. – Robert Pau...
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WARNING: UNPROTECTED PRIVATE KEY FILE! when trying to SSH into Amazon EC2 Instance

... no problem using SSH to interact with my own personal instance, but right now I'm not being allowed permission into Panda's EC2 instance. Getting Started with Panda ...
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How will I know when to create an interface?

...robably implement IWalkable, the latter two don't walk, so they wouldn't. Now you ask "why not just have another superclass, WalkingAnimal, that Dog and Cow derive from?". The answer is when you have something completely outside the inheritance tree that also can walk, such as a robot. Robot woul...
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Python, Unicode, and the Windows console

...e and system console is not necessarily the best combination, but I don't know enough about this, so if you need a definite answer, post a question here on SO about it. – Lasse V. Karlsen Jul 13 '14 at 12:05 ...
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An App ID with Identifier '' is not available. Please enter a different string

... update As of Xcode 8, iOS Team Provision Profile Managed by Xcode are now updated by Xcode automatically and correctly. They are not even listed at the Developer Portal, but generated on-the-flight. However, the solution proposed below will still work. I've switched to using the automatic pro...
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Excel: last character/string match in a string

...ink how to apply without lengthy recursive algorithm. And this solution now seems obsolete. 12 Answers ...