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Mongo: find items that don't have a certain field
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However, somebody reading the code might interpret it as the field has to be equal to null and not missing. This is actually unexpected behavior, because you wouldn't be able to do the same for 0 (which is also false), so null is kind of the e...
How to skip “are you sure Y/N” when deleting files in batch files
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Use del /F /Q to force deletion of read-only files (/F) and directories and not ask to confirm (/Q) when deleting via wildcard.
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How to set default font family for entire Android app
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I had the same issue with embedding a new font and finally got it to work with extending the TextView and set the typefont inside.
public class YourTextView extends TextView {
public YourTextView(Con...
Insert picture/table in R Markdown [closed]
...cheat sheets or HOWTOs for tables and images. Top on my list are:
Pandoc readme, specifically tables
RStudio's RMarkdown, more details in basics (including tables) and a rewrite of pandoc's markdown.
Pictures are very simple to use but do not offer the ability to adjust the image to fit the page...
Determine if a function exists in bash
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Unless I misread, using type will have to perform an admittedly minimal access, to check if there is a matching file. @Lloeki, you're quite correct, but it is the option that produces minimal output, and you can still use the errorlevel...
Python timedelta in years
.../28. If you'd rather return 3/1, just change the last return statement to read::
return from_date.replace(month=3, day=1,
year=from_date.year-years)
Your question originally said you wanted to know how many years it's been since some date. Assuming you want an i...
UIActivityViewController crashing on iOS 8 iPads
... but caused crashes when simulating iPads.
I just want to add to this thread of answers here that, at least in Swift 2.0, you don't need an if statement. You can just make the popoverPresentationController optional.
As a quick aside, the accepted answer appears to be saying that you could have...
svn: replace trunk with branch
... @nilbus: Did you try it? IIRC, SVN shows that the files were deleted and readded but internally, it will know that the files have been moved.
– Aaron Digulla
Sep 27 '10 at 7:12
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Exact time measurement for performance testing [duplicate]
...tool for this. There can be few improvements made to it though, see this thread specifically: Benchmarking small code samples in C#, can this implementation be improved?.
I have seen some useful tips by Thomas Maierhofer here
Basically his code looks like:
//prevent the JIT Compiler from optimiz...
How is Racket different from Scheme?
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delimited continuations (more general than call/cc)
continuation marks
threads
places
ffi
The module and macro system are much more general than the RnRS specification.
Together with #lang reader/language specification makes it possible to define custom languages (with custom syntax) and use the...