pythagorean

问题 I have written a method pythagoreanTriplets in scala using nested loops. As a newbie in scala, I am struggling with how can we do the same thing using recursion and use Lazy Evaluation for the returning list(List of tuples). Any help will be highly appreciated. P.S: The following method is working perfectly fine. // This method returns the list of all pythagorean triples whose components are // at most a given limit. Formula a^2 + b^2 = c^2 def pythagoreanTriplets(limit: Int): List[(Int, Int,

问题 I have written a method pythagoreanTriplets in scala using nested loops. As a newbie in scala, I am struggling with how can we do the same thing using recursion and use Lazy Evaluation for the returning list(List of tuples). Any help will be highly appreciated. P.S: The following method is working perfectly fine. // This method returns the list of all pythagorean triples whose components are // at most a given limit. Formula a^2 + b^2 = c^2 def pythagoreanTriplets(limit: Int): List[(Int, Int,

问题 I got an unexpected result while solving Problem 75 in Project Euler. My code does find the correct solution, but it behaves strangely. My solution consists of traversing a Pythagorean tree (Barning's matrices) until the perimeter limit is reached, counting the numbers of times the perimeter assumed each value, and, lastly, counting the perimeter lengths that occurred only once. My admittedly untidy but functioning code is: (defparameter *barning-matrixes* '(#(1 -2 2) #(2 -1 2) #(2 -2 3) #(1

问题 I got an unexpected result while solving Problem 75 in Project Euler. My code does find the correct solution, but it behaves strangely. My solution consists of traversing a Pythagorean tree (Barning's matrices) until the perimeter limit is reached, counting the numbers of times the perimeter assumed each value, and, lastly, counting the perimeter lengths that occurred only once. My admittedly untidy but functioning code is: (defparameter *barning-matrixes* '(#(1 -2 2) #(2 -1 2) #(2 -2 3) #(1

问题 I have looked at other questions that have been answered however, I am still unsure on how to; Get UK postcode data including Longitude, Latitude, Grid-N and Grid-E into my database If I use an API how do I go about it? Where do I start from? Would I need to use Pythagorus Theorem to calculate the distance between the two postcodes? I have got a table in my database for when a user adds a property. Maybe, there is a way when someone adds a property, it can add that postcode along with the

问题 I am trying to create a program that prints the mapping data for found pythagorean triples in C. So far, I have coded the program to be able to find the triples. #include <stdio.h> #include <math.h> int main (int argc, char * argv[]) { int a, b, c; int a2, b2, c2; int limit = 60; for (a = 1; a <= limit; a++) { a2 = a * a; for (b = 1; b <= limit; b++) { b2 = b * b; for (c = 0; c <= ((int)sqrt(a2+b2)); c++) { c2 = c * c; if (a < b && (c2 == (a2 + b2))) { printf("triple: %d %d %d\n", a, b, c); }

问题 I am trying to find not just the closest point, but the 3 closest points in an array of 5 object points. I have tried several experiments using just a distance( d ) variable for each point. But I cannot figure out how to iterate through each point, compare it to the other points using the Pythagorean Theorem/Distance formula, and then find the closest 3. If the array has 5 points, I am guessing I need to store the results of each iteration in an array with a distance ( d ) value, sort by the

问题 So I got a circle in a Windows Forms Application and have to place 20 random points in this circle. My idea was to split the circle into 4 parts to make it more balanced. My problem is that the points are all generated around the middle and I have no idea how to fix this... Graphics g; Pen p; Random r = new Random(); int[] KegelX = new int[20]; int[] KegelY = new int[20]; private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) {

问题 I've just started learning haskell(literally, tonight!) and I'm having a little trouble understanding the logic of list comprehensions, more specifically the <- operator. A little example on Learn You Some Haskell Finds all tuples that have a length less than 10: ghci> let triangles = [ (a,b,c) | c <- [1..10], b <- [1..10], a <- [1..10] ] my initial understanding was that these would all increment together, but after seeing the output I really dont understanding the incrementing method for

问题 I am building a road editor where one can drag predefined road segments together and combine them to a connected road. One of those segments is a right curve. The curve is drawn as SVG (using D3 arc path function) and has two handles to change the radius and the length directly within the SVG (small black circle changes length and small black square changes the radius). I use a d3 drag handler on the handles. To calculate the new central angle I do as follows: get YOffset from center point of