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Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
...
Get underlying NSData from UIImage
...ct with init(data: originalData), that originalData will be converted into raw data in some kind of internal format. These data can be retrieved later with
let rawData = myImage.cgImage?.dataProvider?.data as Data?
However because the rawData is raw, it is going to be even larger than when using ...
Accessing an array out of bounds gives no error, why?
...guous addresses. There is no bounds checking because it is simply exposing raw memory. Implementing a robust bounds-checking mechanism would have been almost impossible in C.
In C++, bounds-checking is possible on class types. But an array is still the plain old C-compatible one. It is not a class. ...
What is time_t ultimately a typedef to?
...e did for Y2K. Some of us will make a bucketload of money from being Y2k38 consultants, Leonard Nimoy will bring out another hilarious book about how we should all go and hide in the forest...
– paxdiablo
Jan 23 '09 at 0:40
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jQuery remove all list items from an unordered list
...
raw js (no jQuery) solution: stackoverflow.com/questions/10750137/remove-all-li-from-ul
– Eido95
Feb 17 '16 at 20:34
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What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...ical) extension, __FUNCSIG__.
For the nonstandard macros, you will want to consult your compiler's documentation. The Visual C++ extensions are included in the MSDN documentation of the C++ compiler's "Predefined Macros". The gcc documentation extensions are described in the gcc documentation page...
Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...nts to these functions,
meaning that many people (including me!) have to consult the
documentation every time.
How to use it (using the data from @Aaron):
pivot_wider(data = tmp, names_from = y, values_from = z)
x a b c
<fct> <dbl> <dbl> <dbl>
1 x ...
How to download an entire directory and subdirectories using wget?
...t -r --no-parent http://abc.tamu.edu/projects/tzivi/repository/revisions/2/raw/tzivi/
The Parameters are:
-r //recursive Download
and
--no-parent // Don´t download something from the parent directory
If you don't want to download the entire content, you may use:
-l1 just download t...
Fastest way to convert Image to Byte array
...about CPU resources, pick a format which doesn't bother compressing - just raw ARGB pixels, for example. But of course that will lead to a larger byte array.
Note that if you pick a format which does include compression, there's no point in then compressing the byte array afterwards - it's almost c...
Bash: Syntax error: redirection unexpected
...lem from my Dockerfile as I had:
RUN bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer)
However, according to this issue, it was solved:
The exec form makes it possible to avoid shell string munging, and
to RUN commands using a base ...