View Category
Find the distance between two points
fantom
px1 := 34.0f; py1 := 78.0f; px2 := 67.0f; py2 := -45.0f
distance := |Float x1, Float y1, Float x2, Float y2 -> Float|
{ ((x2-x1).pow(2.0f) + (y2-y1).pow(2.0f)).sqrt }
distance(px1, py1, px2, py2)
distance := |Float x1, Float y1, Float x2, Float y2 -> Float|
{ ((x2-x1).pow(2.0f) + (y2-y1).pow(2.0f)).sqrt }
distance(px1, py1, px2, py2)
csharp
System.Drawing.Point p = new System.Drawing.Point(13, 14),
p1 = new System.Drawing.Point(10, 10);
double distance = Math.Sqrt(Math.Pow(p1.X - p.X, 2) + Math.Pow(p1.Y - p.Y, 2)));
p1 = new System.Drawing.Point(10, 10);
double distance = Math.Sqrt(Math.Pow(p1.X - p.X, 2) + Math.Pow(p1.Y - p.Y, 2)));
Zero pad a number
Given the number 42, pad it to 8 characters like 00000042
fantom
formatted := 42.toStr.padl(8, '0')
formatted := 42.toLocale("00000000")
csharp
string.Format("{0,8:D8}", 42);
Right Space pad a number
Given the number 1024 right pad it to 6 characters
"1024 "
fantom
formatted := 1024.toStr.padr(6)
csharp
public class NumberRightPadding {
public static void Main() {
string withStringDotFormat = string.Format("{0,-6}", 1024);
string withToStringDotPadRight = 1024.ToString().PadRight(6);
}
}
public static void Main() {
string withStringDotFormat = string.Format("{0,-6}", 1024);
string withToStringDotPadRight = 1024.ToString().PadRight(6);
}
}
Format a decimal number
Format the number 7/8 as a decimal with 2 places: 0.88
fantom
formatted := (7.0/8.0).toLocale("0.00")
csharp
public class FormatDecimal {
public static void Main() {
decimal result = decimal.Round( 7 / 8m, 2);
System.Console.WriteLine(result);
}
}
public static void Main() {
decimal result = decimal.Round( 7 / 8m, 2);
System.Console.WriteLine(result);
}
}
Left Space pad a number
Given the number 73 left pad it to 10 characters
" 73"
fantom
formatted := 73.toStr.padl(10)
csharp
public class NumberLeftPadding {
public static void Main() {
string withStringDotFormat = string.Format("{0,10}", 73);
string withToStringDotPadLeft = 73.ToString().PadLeft(10);
}
}
public static void Main() {
string withStringDotFormat = string.Format("{0,10}", 73);
string withToStringDotPadLeft = 73.ToString().PadLeft(10);
}
}
Generate a random integer in a given range
Produce a random integer between 100 and 200 inclusive
fantom
r := Int.random(100..200)
csharp
System.Random r = new System.Random();
int random = r.Next(100,201);
int random = r.Next(100,201);
Generate a repeatable random number sequence
Initialise a random number generator with a seed and generate five decimal values. Reset the seed and produce the same values.
fantom
rand := Random.makeSeeded(12345)
first := Int[,].fill(0,5).map { rand.next(100..200) }
rand2 := Random.makeSeeded(12345)
second := Int[,].fill(0,5).map { rand2.next(100..200) }
first := Int[,].fill(0,5).map { rand.next(100..200) }
rand2 := Random.makeSeeded(12345)
second := Int[,].fill(0,5).map { rand2.next(100..200) }
csharp
using System;
public class RepeatableRandom {
public static void Main() {
var r = new Random(12); // seed is 12
for (int i = 0; i < 5; i++)
Console.WriteLine(r.Next());
r = new Random(12);
for (int i = 0; i < 5; i++)
Console.WriteLine(r.Next());
}
}
public class RepeatableRandom {
public static void Main() {
var r = new Random(12); // seed is 12
for (int i = 0; i < 5; i++)
Console.WriteLine(r.Next());
r = new Random(12);
for (int i = 0; i < 5; i++)
Console.WriteLine(r.Next());
}
}
