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How to determine if a list of polygon points are in clockwise order?
...ave to link the last point to the first one. If you have N points numbered from 0 to N-1, then you must calculate: Sum( (x[(i+1) mod N] - x[i]) * (y[i] + y[(i+1) mod N]) ) for i = 0 to N-1. I.e., must must take the index Modulo N (N ≡ 0) The formula works only for closed polygons. Polygons have no...
Generating a Random Number between 1 and 10 Java [duplicate]
...and the specified value (exclusive)". This means that you will get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number.
Generally speaking, if you need to generate numbers from min to max (including both), you write
random.nextInt(max - min + 1) + min...
How to get past the login page with Wget?
...te-after to the first retrieval so you don't end up saving the result page from logging in.
– Jim Hunziker
Jan 2 '13 at 15:41
2
...
List all the modules that are part of a python package?
...rt pkgutil
# this is the package we are inspecting -- for example 'email' from stdlib
import email
package = email
for importer, modname, ispkg in pkgutil.iter_modules(package.__path__):
print "Found submodule %s (is a package: %s)" % (modname, ispkg)
How to import them too? You can just use...
What is the purpose of willSet and didSet in Swift?
... = 0 {
didSet {
print("The value of myProperty changed from \(oldValue) to \(myProperty)")
}
}
}
myProperty prints its old and new value every time it is modified. With just getters and setters, I would need this instead:
class Foo {
var myPropertyValue: Int = ...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
... Depends I guess, on more reasons than I can list and it has to be decided from case to case.
– Some programmer dude
Aug 11 '17 at 15:48
3
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What is the difference between ELF files and bin files?
...the kernel and automatically, all symbols used, are adjusted to the offset from that memory address where it was loaded into. Usually ELF files have a number of sections, such as 'data', 'text', 'bss', to name but a few...it is within those sections where the run-time can calculate where to adjust ...
How to get key names from JSON using jq
..., so your last filter should be eg.:
cat input.json | jq -r 'keys'
From jq help:
-r output raw strings, not JSON texts;
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follo...
memcpy() vs memmove()
...t) manner. Simplistically, it just loops over the data (in order), copying from one location to the other. This can result in the source being overwritten while it's being read.
Memmove does more work to ensure it handles the overlap correctly.
EDIT:
(Unfortunately, I can't find decent examples, ...
Should Github be used as a CDN for javascript libraries? [closed]
Serving javascript libraries from a CDN instead of your own server comes with tremendous advantages. Less work for your server, possibility for the CDN to have a copy closer to the user than your server, but most importantly a good chance that your user's browser already has it cached from that URL...