JavaScript has two number types: Number and BigInt. The most frequently-used number type, Number, is a 64-bit floating point IEEE 754 number. The largest exact integral value of this type is Number.MAX_SAFE_INTEGER, which is: 253-1, or +/- 9,007,199,254,740,991, or nine quadrillion seven trillion one hundred ninety-nine billion two hundred fifty-four million seven hundred forty thousand … Read more
This link might be helpful to you, as it details the use of the Haversine formula to calculate the distance. Excerpt: This script [in Javascript] calculates great-circle distances between the two points – that is, the shortest distance over the earth’s surface – using the ‘Haversine’ formula. function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) { var R = 6371; // … Read more
For some number y and some divisor x compute the quotient (quotient)[1] and remainder (remainder) as: const quotient = Math.floor(y/x); const remainder = y % x; Example: const quotient = Math.floor(13/3); // => 4 => the times 3 fits into 13 const remainder = 13 % 3; // => 1 [1] The integer number resulting … Read more
Here’s a summary of Dimitris Andreou’s link. Remember sum of i-th powers, where i=1,2,..,k. This reduces the problem to solving the system of equations a1 + a2 + … + ak = b1 a12 + a22 + … + ak2 = b2 … a1k + a2k + … + akk = bk Using Newton’s identities, … Read more
Use math.isnan: >>> import math >>> x = float(‘nan’) >>> math.isnan(x) True
(StartA <= EndB) and (EndA >= StartB) Proof: Let ConditionA Mean that DateRange A Completely After DateRange B _ |—- DateRange A ——| |—Date Range B —–| _ (True if StartA > EndB) Let ConditionB Mean that DateRange A is Completely Before DateRange B |—- DateRange A —–| _ _ |—Date Range B —-| (True … Read more
I figured out a method that works ~35% faster than your 6bits+Carmack+sqrt code, at least with my CPU (x86) and programming language (C/C++). Your results may vary, especially because I don’t know how the Java factor will play out. My approach is threefold: First, filter out obvious answers. This includes negative numbers and looking at … Read more
Binary floating point math is like this. In most programming languages, it is based on the IEEE 754 standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power … Read more