random

问题 I'm coding an arithmetic game where the user is asked a series of addition questions. I want to however randomly assign an operator for each question so that the question could be either: Question 1: num1 + num2 = or Question 2: num1 - num2 = I have been using the Math.random() method to randomise num1 and num2 the last thing I am struggling on is randomly generating '+' and '-'. Is it something to do with the ASCII values of these two characters and then I can randomly pick between them?

问题 This question already has answers here : Generating random results by weight in PHP? (12 answers) Closed 7 years ago . I want to select a number randomly, but based on probability from a group of numbers; for example (2-6). I'd like the following distribution: 6's probability should be 10% 5's probability should be 40% 4's probability should be 35% 3's probability should be 5% 2's probability should be 5% 回答1: The best you can do is generate a number between 0 and 100, and see in what range

问题 This question already has answers here : Generating random results by weight in PHP? (12 answers) Closed 7 years ago . I want to select a number randomly, but based on probability from a group of numbers; for example (2-6). I'd like the following distribution: 6's probability should be 10% 5's probability should be 40% 4's probability should be 35% 3's probability should be 5% 2's probability should be 5% 回答1: The best you can do is generate a number between 0 and 100, and see in what range

问题 I need to make a big test file for a sorting algorithm. For that I need to generate 10 million random strings. How do I do that? I tried using cat on /dev/urandom but it keeps going for minutes and when I look in the file, there are only around 8 pages of strings. How do I generate 10 million strings in bash? Strings should be 10 characters long. 回答1: This will not guarantee uniquness, but gives you 10 million random lines in a file. Not too fast, but ran in under 30 sec on my machine: cat

问题 I have a div in the middle of a simple webpage. When I hover this div, I want my cursor to change randomly to a customized image. I know how to set my own cursor image with css. But how to use javascript to make this cursor image different each time we refresh the page? This website shows exactly what I want to achieve. When we hover an image, the cursor becomes a little icon that is different each time we refresh the page. https://glossier.com/#!/ Thanks in advance. 回答1: You need an array of

问题 Looking for a help / solution here. a = [1,2,3] b = [1,2,3] c = [1,2,3] d = [a,b,c] random.choice(random.choice(d)) this gives me 1,2 or 3. But how to find which list variable this random function used out of a , b , c ? how can I use or what is the syntax of the index function for this ? for my program I have to pop the element the random choice returns. 回答1: If you want to remove something from the randomly chosen list, you don't need to have the variable name. The list object itself will

问题 Looking for a help / solution here. a = [1,2,3] b = [1,2,3] c = [1,2,3] d = [a,b,c] random.choice(random.choice(d)) this gives me 1,2 or 3. But how to find which list variable this random function used out of a , b , c ? how can I use or what is the syntax of the index function for this ? for my program I have to pop the element the random choice returns. 回答1: If you want to remove something from the randomly chosen list, you don't need to have the variable name. The list object itself will

问题 I am using data from this site to get random numbers. They come in as a buffer, which I convert to binary, then into integer. I would like to finally convert those random numbers into decimal values between 0 and 1 like Math.random() produces. For example, if I have the integer 151 , what do I need to do to make it look more like this float 0.0151234252525372 . Here is my code: const bent = require('bent') const getBuffer = bent('buffer') let array = [] async function random(){ try{ let

问题 I was wondering which of shuffle() and choice() was more efficient. For example, I have a N element list long_list and need a random item from the list, is it quicker to do: shuffle(long_list) return long_list[0] or return choice(long_list) 回答1: random.choice() will always be faster as it does lookups in constant time O(1) random.shuffle() requires iterating over the full sequence to execute the shuffle and this would be O(n), and then your lookup which is constant time O(1) The source code

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . Improve this question I swear, this seems to be changing every time I check the MSDN documentation. When I coded my executable Microsoft was suggesting to use RtlGenRandom API to generate cryptographically strong random numbers. Now when I'm checking documentation for RtlGenRandom