The de-facto unbiased shuffle algorithm is the Fisher-Yates (aka Knuth) Shuffle. See https://github.com/coolaj86/knuth-shuffle You can see a great visualization here (and the original post linked to this)
To answer this question specifically, two problems: $randstring is not in scope when you echo it. The characters are not getting concatenated together in the loop. Here’s a code snippet with the corrections: Output the random string with the call below: Please note that this generates predictable random strings. If you want to create secure tokens, see … Read more
I think this will work for you:
srand() gives the random function a new seed, a starting point (usually random numbers are calculated by taking the previous number (or the seed) and then do many operations on that number to generate the next). time(0) gives the time in seconds since the Unix epoch, which is a pretty good “unpredictable” seed (you’re guaranteed your seed … Read more
How to generate a random number within a range in Bash?
Use lists unless you want some very specific features that are in the C array libraries. python really has three primitive data structures More on data structures here: http://docs.python.org/tutorial/datastructures.html
There are some examples on the Mozilla Developer Network page: Here’s the logic behind it. It’s a simple rule of three: Math.random() returns a Number between 0 (inclusive) and 1 (exclusive). So we have an interval like this: Now, we’d like a number between min (inclusive) and max (exclusive): We can use the Math.random to get the correspondent in the [min, max) interval. But, first we … Read more
Use random.uniform(a, b):
You can use random.uniform
How do I generate a random int value in a specific range? I have tried the following, but those do not work: Attempt 1: Bug: randomNum can be bigger than maximum. Attempt 2: Bug: randomNum can be smaller than minimum.