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Launching Google Maps Directions via an intent on Android
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Navigation intents seem to be officially supported now: developers.google.com/maps/documentation/android/…
– Sanketh Katta
Feb 15 '15 at 1:59
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Designing function f(f(n)) == -n
...turn n - 1
else:
return -1 * (n + 1)
Python automatically promotes integers to arbitrary length longs. In other languages the largest positive integer will overflow, so it will work for all integers except that one.
To make it work for real numbers you need to replace the n ...
Node.js get file extension
... Try 'filename.css.gz'.split('.').slice(1).join('.') to get all extensions
– Trevor
Jul 31 '17 at 21:53
11
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Suppress Scientific Notation in Numpy When Creating Array From Nested List
...-printing-in-numpy.html
For SciPy.org numpy documentation, which includes all function parameters (suppress isn't detailed in the above link), see here: https://docs.scipy.org/doc/numpy/reference/generated/numpy.set_printoptions.html
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Difference between “git checkout ” and “git checkout -- ”
...his is not Git-specific, it's a general Unix command line convention. Normally you use it to clarify that an argument is a file name rather than an option, e.g.
rm -f # does nothing
rm -- -f # deletes a file named "-f"
git checkout1 also takes -- to mean that subsequent arguments are not ...
What is __future__ in Python used for and how/when to use it, and how it works
__future__ frequently appears in Python modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc .
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How do I shutdown, restart, or log off Windows via a bat file?
... -l — Logs off.
shutdown -h — Hibernates.
Note: There is a common pitfall wherein users think -h means "help" (which it does for every other command-line program... except shutdown.exe, where it means "hibernate"). They then run shutdown -h and accidentally turn off their computers. Watch out f...
Get the name of an object's type
...nstance (2).constructor.name is "Number".
But here are various hacks that all fall down in one way or another:
Here is a hack that will do what you need - be aware that it modifies the Object's prototype, something people frown upon (usually for good reason)
Object.prototype.getName = function() { ...
How to find out the number of CPUs using python
...sing Python. The result should be user/real as output by time(1) when called with an optimally scaling userspace-only program.
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Rearrange columns using cut
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This is very often inefficient. Typically, you will find that the corresponding Awk script is a lot faster, for example. You should also be careful to quote the values "$col2" and "$col1" -- there could be shell metacharacters or other shenanigans in the data.
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