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How to calculate the angle between a line and the horizontal axis?
...this function like this, and negative the Y coordinates:
Example in Swift 2.0
func angle_between_two_points(pa:CGPoint,pb:CGPoint)->Double{
let deltaY:Double = (Double(-pb.y) - Double(-pa.y))
let deltaX:Double = (Double(pb.x) - Double(pa.x))
var a = atan2(deltaY,deltaX)
while a ...
How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
...
SWIFT 2.0
simple:
let myString = "full text container"
let substring = myString[myString.startIndex..<myString.startIndex.advancedBy(3)] // prints: ful
SWIFT 3.0
let substring = myString[myString.startIndex..<myString.in...
What is the difference between int, Int16, Int32 and Int64?
...g should give you 0 and not -1
(I've tested this in all framework versions 2.0, 3.0, 3.5, 4.0)
C#:
Array.IndexOf(new Int16[]{1,2,3}, 1) = -1 (not correct)
Array.IndexOf(new Int32[]{1,2,3}, 1) = 0 (correct)
Array.IndexOf(new Int64[]{1,2,3}, 1) = 0 (correct)
VB.NET:
Array.IndexOf(new Int16(){1,2,...
How do I represent a hextile/hex grid in memory?
... answered Jun 1 '13 at 15:59
a paid nerda paid nerd
27.6k2929 gold badges116116 silver badges166166 bronze badges
...
How to do a scatter plot with empty circles in Python?
...
In matplotlib 2.0 there is a parameter called fillstyle
which allows better control on the way markers are filled.
In my case I have used it with errorbars but it works for markers in general
http://matplotlib.org/api/_as_gen/matplotlib.a...
Can I install Python windows packages into virtualenvs?
...he registry back:
# -*- encoding: utf-8 -*-
#
# script to register Python 2.0 or later for use with win32all
# and other extensions that require Python registry settings
#
# Adapted by Ned Batchelder from a script
# written by Joakim Löw for Secret Labs AB / PythonWare
#
# source:
# http://www.pyt...
What's the cleanest way of applying map() to a dictionary in Swift?
...
No need for temp var and reduce is now a method in Swift 2.0: let newDict = oldDict.reduce([String:Int]()) { (var dict, pair) in dict["new\(pair.1)"] = pair.1; return dict }
– Zmey
Jul 23 '15 at 15:48
...
What are .NET Assemblies?
...s often referred to as a "logical" dll.
Note
The .NET Framework (version 2.0) includes 51 assemblies.
There are two types of assemblies: private and shared. A private assembly can be used by only a single application. A shared assembly, on the other hand, can be used by all applications located o...
Why does typeof NaN return 'number'?
...turn true if an Infinity can be produced by different values: 1.0 / 0.0 or 2.0 / 0.0?
– Hashem Qolami
May 22 '16 at 9:15
...
Cassandra port usage - how are the ports used?
...
For Apache Cassandra 2.0 you need to take into account the following TCP ports:
(See EC2 security group configuration and Apache Cassandra FAQ)
Cassandra
7199 JMX monitoring port
1024 - 65355 Random port required by JMX. Starting with Java 7u4...