I am currently creating an application that allows users to input a weight and select their preferred unit, between kg and lbs. As of now, the database is written in Django and stores each user weight entry for a particular…
I have placed 4 smaller circles on a big circle at 0, 90, 180, 270 degree angle. I expect javascript to return exact same y for red and blue circle (as the shift is horizontal, y is the same but…
For example, as I know, a float point x, which x/n^2 may not be equal to x/n/n, because in x/n/n, which would create an intermediate x/n first. For example: document.write(1.23456789/49 == 1.23456789/7/7); However, is x/4 == x/2/2 an exception, if…
I have a string which I need to convert to number. The thing is, I have 20 decimals and JS lose precision after 15 or 17 decimals, when trying to use parseFloat. Example: const number = "0.0000012726726461401083" const parseNumber =…
Because of Floating point arithmetic in Javascript, i understand 0.2 + 0.1 = 0.30000000000000004 will be in Javascript, but i don't understand why only multiply the figures by 10 i.e. let x = (0.2 * 10 + 0.1 * 10)…
I'm having problems with the case statement in PostgreSQL. Here I want to change the output of the month (number) to text, like January, February, etc. select date_part('month', tanggal) bulan, case when date_part('month', tanggal)= 1 then 'January' when date_part('month', tanggal)…
Big numbers with fraction support: I want to perform math operation with no precision loss. How can I do it using JavaScript? First I tried decimal.js, but it does not preserve precision as you see in next example: import {Decimal}…
So I have a JSON with many fields and I am looping through it as suggested by How effectively to change JSON keys to delete some of the keys I don't need. But after deletion, the original values of the…
What is the simplest way to estimate the nearest rounding, where we know the rounding is always e.g. 100, 10, 1, 0.1 etc. We don't necessarily know the original number. 8 => 1 // we have rounded to the nearest…
I was viewing some code and found some parts use num/2, while others use num * 0.5. That inspired me a question : within the range of MIN_VALUE and MAX_VALUE, are num/2 and num*0.5 interchangeable? I was not only interested…