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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...
What's Go's equivalent of argv[0]?
...guments are exposed in the os package http://golang.org/pkg/os/#Variables
If you're going to do argument handling, the flag package http://golang.org/pkg/flag is the preferred way. Specifically for your case flag.Usage
Update for the example you gave:
func usage() {
fmt.Fprintf(os.Stderr, "us...
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...
raw_input function in Python
...
name = raw_input("What is your name? ")
print "Hello, %s." % name
This differs from input() in that the latter tries to interpret the input given by the user; it is usually best to avoid input() and to stick with raw_input() and custom parsing/conversion code.
Note: This is for Python 2.x
...
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,
...
How to force ViewPager to re-instantiate its items [duplicate]
...hat they are no longer valid or needs to be refreshed? I tried to call notifyDataSetChanged() on its adapter but this does not invoke instantiateItem() method again.
...
Python setup.py develop vs install
...stall (typically third party) packages that you're not going to develop/modify/debug yourself.
For your own stuff, you want to first install your package and then be able to frequently edit the code without having to re-install the package every time — and that is exactly what python setup.py dev...
Adding HTML entities using CSS content
...
@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
...
Matplotlib: draw grid lines behind other graph elements
...
(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"))
...
What does `void 0` mean? [duplicate]
...ndefined
What's the point of that?
It seems pretty useless, doesn't it? If it always returns undefined, what's wrong with just using undefined itself?
In a perfect world we would be able to safely just use undefined: it's much simpler and easier to understand than void 0. But in case you've neve...