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Create an index on a huge MySQL production table without table locking

...ating MySQL's Schema without downtime Thusfar, there's only one method I know of to update a MySql schema and not suffer an availability outage. Circular masters: Master A has your MySQL database running on it Bring Master B into service and have it replicate writes from Master A ( B is a slave ...
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How do I interactively unstage a particular hunk in git?

... I should mention the more recent graphical Git clients now -- GitKraken is beautiful, and supports this (though it now comes with a hefty fee for commercial use). GitHub's GitHub Desktop is free, beautiful, and supports easily staging and unstaging hunks. GitKraken and GitHub Des...
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Is it possible to Turn page programmatically in UIPageViewController?

... Now that the NDA is up can this be expanded on a bit more? Maybe a code sample. – SpaceTrucker Nov 1 '11 at 16:58 ...
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T-SQL get SELECTed value of stored procedure

...FROM MyTable WHERE MyPrimaryKeyField = @Param RETURN @ReturnValue GO and now call your procedure like: DECLARE @SelectedValue int ,@Param int SET @Param=1 EXEC @SelectedValue = GetMyInt @Param PRINT @SelectedValue this will only work for INTs, because RETURN can only return a sin...
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Does the APNS device token ever change, once created?

...ferent devices with the exact same APNS token. I see in front of me right now an iPad 2, and an iPhone 3GS that have sent us the same token. Can anyone else confirm this behavior? – DougW Jun 23 '12 at 1:26 ...
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What is the correct way of using C++11's range-based for?

... The above code prints the elements (ints) in the vector: 1 3 5 7 9 Now consider another case, in which the vector elements are not just simple integers, but instances of a more complex class, with custom copy constructor, etc. // A sample test class, with custom copy semantics. class X { pu...
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Cannot pass null argument when using type hinting

...roblem I have with this is that it changes the definition of the function. Now the parameter is optional - which isn't really what the author intended (although, if he is passing it null, it is implicitly optional). – crush Jan 29 '13 at 13:35 ...
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Setting up maven dependency for SQL Server

...encies for it and try to find out SQL Server connector on the same way I know MySql has it. 8 Answers ...
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How does IPython's magic %paste work?

...d any magic command, just paste it Thanks to prompt_toolkit, IPython now supports: Syntax highlighting as you type Real multi-line editing (up and down arrow keys move between lines) Multi-line paste without breaking indentation or immediately executing code Better code completio...
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How to unstage large number of files without deleting the content

...these items before. $ git reset HEAD fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree. Use '--' to separate paths from revisions – sarat Aug 18 '11 at 7:17 ...