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Is Ruby pass by reference or by value?
...has a reference to. (Even this isn't bulletproof, though — both of the standard cloning methods do a shallow copy, so the instance variables of the clone still point to the same objects that the originals did. If the objects referenced by the ivars mutate, that will still show up in the copy, sinc...
Is there a way to automate the android sdk installation?
Now I have to download and install the Android SDK and AVD Manager, and then install the APIs, tools through the UI. Is there a way to automate this process?
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Animate change of view controllers without using navigation controller stack, subviews or modal cont
NavigationControllers have ViewController stacks to manage, and limited animation transitions.
6 Answers
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Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
...OS7.
In iOS7, some views can hide the status bar or have it transparent and, in effect, it is overlaid on top of your view. So if you put a UI element at (0.0, 0.0) on iOS6, it will appear below the status bar, but on iOS7 it would appear partially covered underneath the status bar. So in that ...
Net::SMTPAuthenticationError when sending email from Rails app (on staging environment)
...tion)
Solution: Go to http://www.google.com/accounts/DisplayUnlockCaptcha and click continue (this will grant access for 10 minutes for registering new apps).
After this my app in production started sending emails ;)
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What static analysis tools are available for C#? [closed]
...re there available for static analysis against C# code? I know about FxCop and StyleCop. Are there others? I've run across NStatic before but it's been in development for what seems like forever - it's looking pretty slick from what little I've seen of it, so it would be nice if it would ever see th...
How do I check if a string is unicode or ascii?
...pes. A Unicode string may consist of purely characters in the ASCII range, and a bytestring may contain ASCII, encoded Unicode, or even non-textual data.
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How to convert an entire MySQL database characterset and collation to UTF-8?
How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?
19 Answers
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std::next_permutation Implementation Explanation
...tation was implemented so I extracted the the gnu libstdc++ 4.7 version and sanitized the identifiers and formatting to produce the following demo...
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Simple Pivot Table to Count Unique Values
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Insert a 3rd column and in Cell C2 paste this formula
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B2))>1,0,1)
and copy it down. Now create your pivot based on 1st and 3rd column. See snapshot
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