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Rails DB Migration - How To Drop a Table?
... This worked for me too. But on full migrations (installing from scratch) the table will now be first created and later on dropped again. Is it safe to remove the create and drop migrations down the road?
– berkes
Jan 17 '11 at 20:04
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Software keyboard resizes background image on Android
...ground image doesn't contain relevant information. The problem I encounter from time to time is that my background will contain something like a logo, and setting the window background to the image hides the logo behind the ActionBar. For certain screens this isn't an issue, but sometimes I am requi...
How to convert Set to String[]?
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From Java 7 we can use String[] GPXFILES1 = myset.toArray(new String[0]) and that's recommended. Update the answer. "Since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array versi...
Setting default value for TypeScript object passed as argument
...ob' });
The trick is to first put in brackets what keys you want to pick from the argument object, with key=value for any defaults. Follow that with the : and a type declaration.
This is a little different than what you were trying to do, because instead of having an intact params object, you hav...
How to play a notification sound on websites?
... @Stefan That's correct but may be confusing. I'll remove that from my answer. Thanks for the hint.
– Timo
Apr 11 '12 at 16:09
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What does “static” mean in C?
...f we crank up the optimization with -O3, the si symbol is removed entirely from the symbol table: it cannot be used from outside anyways. TODO why keep static variables on the symbol table at all when there is no optimization? Can they be used for anything? Maybe for debugging.
See also
analogous...
Why main does not return 0 here?
...printf which in this case is 9 which then gets "promoted" as the exit code from main somehow when using certain gcc versions.
– A.H.
Dec 30 '11 at 9:47
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Difference between == and ===
...er two object references both refer to the same object instance.
Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/us/jEUH0.l
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How do you see the entire command history in interactive Python?
...int readline.get_history_item(i + 1)
Note: get_history_item() is indexed from 1 to n.
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Does a finally block run even if you throw a new Exception?
... for must-run logic. If it must-run do it before the try-catch block, away from something that could throw an exception, as your intention is almost certainly functionally the same.
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