math

问题 I need to filter this object array by minimum value of 'rest' attribute. This is an one way to do it. Is there any other ways ? 'data' variable is a result of chained function. Is there any other way to do this without calling 'data' variable again inside Math.min() function. let data = [ { size: 5, qty: 2, rest: 0 }, { size: 2, qty: 5, rest: 0 }, { size: 1, qty: 10, rest: 0 }, { size: 3, qty: 3, rest: 1 }, { size: 4, qty: 2, rest: 2 } ] let result = data.filter(e=> e.rest === Math.min(..

问题 I'm developing a simulation where player should be able to move around inside a 2D circle (referred to as sphere in my code). The players movement must be relative to the center of the circle. My first step was to make sure the player always faces the center. I got the working fine. However when I tried to do the relative movement it doesn't give my quite the result I'm looking for. When I move the player close to the center of circle and move sideways (which is relative to the player's

问题 I am trying to split a Math Expression. String number = "100+500"; String[] split = new String[3]; I want to make split[0] = "100" split[1] = "+" split[2] = "500" I tried this but I don't know what to write for splitting. split = number.split(????); 回答1: You want to split between digits and non-digits without consuming any input... you need look arounds: String[] split = number.split("(?<=\\d)(?=\\D)|(?<=\\D)(?=\\d)"); What the heck is that train wreck of a regex? It's expressing the initial

问题 I was tasked to find a digit of kth position after the decimal point of a fraction(a/b). Yesterday I found out this algorithm. To get any digit after the decimal point, I generate a variable called rem and make a loop for (int i = 1; i <= k+1; i++) { rem = a%b; a = rem*10; } cout << a/b; the loop will return a value being the kth digit after the decimal point. However the task require me to calculate with a,b,k being very large number ( less or equal to 10e18), so it's sure that the code will

问题 I'm working with the image segmentation. I need to compute image gradient in the point, so I was trying to understand by myself (because I know how to calculate gradient when having an ordinary equation) but I failed. I was googling... and googling but to find wright answer I couldn't. Can anyone say or give some information how to compute image gradient in the point step by step? 回答1: The gradient at each pixel of an image I(x, y) is simply the 2D vector (dI/dx,dI/dy)(x, y) . Approximate dI

问题 (I apologize that previous versions of this question displayed the wrong function that I need to fix, this has been remedied and I hope the question makes a little more sense now.) I have a list of objects with scores, and I'm attempting to assign rank to them based on those scores. Below is basically how I output my data. sorted_scores = [ ('Apolo Ohno', 0), ('Shanie Davis', -1), ('Bodie Miller', -2), ('Lindsay Vohn', -3), ('Shawn White', -3), ('Bryan Veloso', -4) ] I have a tie. Now, the

问题 For a text analysis program, I would like to analyze the co-occurrence of certain words in a text. For example, I would like to see that e.g. the words "Barack" and "Obama" appear more often together (i.e. have a positive correlation) than others. This does not seem to be that difficult. However, to be honest, I only know how to calculate the correlation between two numbers, but not between two words in a text. How can I best approach this problem? How can I calculate the correlation between

问题 I'm developing a 3D space game, which is using alot of math formulas, navigation, ease effects, rotations, huge distances between planets, objects mass, and so on... My Question is what would be the best way in doing so using math. Should I calculate everything as integers and obtain really large integers(over 20 digits), or use small numbers with decimals. In my experience, math when using digits with decimals is not accurate, causing strange behavior when using large numbers with decimals.

问题 I'm developing a 3D space game, which is using alot of math formulas, navigation, ease effects, rotations, huge distances between planets, objects mass, and so on... My Question is what would be the best way in doing so using math. Should I calculate everything as integers and obtain really large integers(over 20 digits), or use small numbers with decimals. In my experience, math when using digits with decimals is not accurate, causing strange behavior when using large numbers with decimals.

问题 I'm developing a 3D space game, which is using alot of math formulas, navigation, ease effects, rotations, huge distances between planets, objects mass, and so on... My Question is what would be the best way in doing so using math. Should I calculate everything as integers and obtain really large integers(over 20 digits), or use small numbers with decimals. In my experience, math when using digits with decimals is not accurate, causing strange behavior when using large numbers with decimals.