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Ruby Arrays: select(), collect(), and map()
...following:
details.select{ |item| item[:qty] != "" }
That will give you all items where the :qty key isn't an empty string.
official select documentation
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Cython: “fatal error: numpy/arrayobject.h: No such file or directory”
...... you don't need to even open a command line if you use IPython ... it's all very convenient. In your case, try running these commands in IPython or in a normal Python script:
import numpy
import pyximport
pyximport.install(setup_args={"script_args":["--compiler=mingw32"],
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Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
I am developing a small application that lists all the applications present/ installed on the android device. But I'm getting the below error while i'm trying to run the code.
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When to prefer JSON over XML?
...erate with environments that don't support JSON
Favor JSON over XML when all of these are true:
Messages don't need to be validated, or validating their deserialization is simple
You're not transforming messages, or transforming their deserialization is simple
Your messages are mostly data, not ...
What do @, - and + do as prefixes to recipe lines in Make?
...cuted.
- means ignore the exit status of the command that is executed (normally, a non-zero exit status would stop that part of the build).
+ means 'execute this command under make -n' (or 'make -t' or 'make -q') when commands are not normally executed. See also the POSIX specification for make and ...
How do I correctly detect orientation change using Phonegap on iOS?
...then 90 would mean it's in portrait mode. As a work around to this, I initially check the height vs width of the window to store the orientation, and use orientationchange to update this if there's a change.
– benallansmith
Feb 21 '16 at 23:59
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Throw keyword in function's signature
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No, it is not considered good practice. On the contrary, it is generally considered a bad idea.
http://www.gotw.ca/publications/mill22.htm goes into a lot more detail about why, but the problem is partly that the compiler is unable to enforce this, so it has to be checked at runtime, which i...
Change directory command in Docker?
... && \
rm -f treeio.zip && cd treeio && pip install -r requirements.pip
Because of the use of '&&', it will only get to the final 'pip install' command if all the previous commands have succeeded.
In fact, since every RUN creates a new commit & (currently) a...
Catch multiple exceptions in one line (except block)
...t be in a tuple for catching to work as expected.
– BallpointBen
Mar 22 '18 at 16:02
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Why would ...
How can I change the default width of a Twitter Bootstrap modal box?
...sier. .modal .modal-dialog { width: 800px; } The left position is automatically calculated.
– Gavin
Sep 9 '13 at 8:14
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