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Static classes and methods in coffeescript
...Box2DUtility.drawWorld()
Demo: http://jsfiddle.net/ambiguous/5yPh7/
And if you want your drawWorld to act like a constructor then you can say new @ like this:
class Box2DUtility
constructor: (s) -> @s = s
m: () -> alert "instance method called: #{@s}"
@drawWorld: (s) -> new @ s
B...
Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
...st took the source code from b93 and put it in a "util" class. I had to modify it slightly to work with the current API.
For reference here's the working code (take it at your own risk...):
public static<A, B, C> Stream<C> zip(Stream<? extends A> a,
...
Adding HTML entities using CSS content
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@Adam, no, if you want to append an image, use "background-image" and display:inline-block; and width:123px; height:123px; (use exact width/height)
– Nathan J.B.
Oct 10 '13 at 4:42
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Matplotlib: draw grid lines behind other graph elements
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(I am currently installing matplotlib for the first time, so have no idea if that's correct - I just found it by googling "matplotlib z order grid" - "z order" is typically used to describe this kind of thing (z being the axis "out of the page"))
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How can I filter lines on load in Pandas read_csv function?
...ther load the file and then filter using df[df['field'] > constant], or if you have a very large file and you are worried about memory running out, then use an iterator and apply the filter as you concatenate chunks of your file e.g.:
import pandas as pd
iter_csv = pd.read_csv('file.csv', iterat...
Why do we need argc while there is always a null at the end of argv?
...==NULL is guaranteed. See C11 5.1.2.2.1 Program startup (my emphasis)
If they are declared, the parameters to the main function shall obey
the following constraints:
The value of argc shall be nonnegative.
argv[argc] shall be a null
pointer.
Providing argc therefore isn't vital but...
Reasons that the passed Intent would be NULL in onStartCommand
...incoming flags. I'm going to monitor this in the logs with the following:
if (null == intent || null == intent.getAction ()) {
String source = null == intent ? "intent" : "action";
Log.e (TAG, source + " was null, flags=" + flags + " bits=" + Integer.toBinaryString (flags));
...
Delete all lines beginning with a # from a file
...llowed by # might also be treated as a comment:
grep -v '^ *#' filename
if whitespace is only spaces, or
grep -v '^[ ]#' filename
where the two spaces are actually a space followed by a literal tab character (type "control-v tab").
For all these commands, omit the filename argument to read f...
The command rbenv install is missing
...stall ruby-build
# Building ruby-build form Ports will install rbenv only if the RBENV option is set
cd /usr/ports/devel/ruby-build
make install
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Applying function with multiple arguments to create a new pandas column
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This is a useful solution. If the size of input arguments to the function x and y are not equal, you get an error. In that case, the @RomanPekar solution works without any problem. I didn't compare the performance.
– Ehsan Sadr
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