How to Get Random Permutation of Integers in Golang?
Go language provides inbuilt support for generating random numbers of the specified type with the help of a math/rand package. This package implements pseudo-random number generators. These random numbers are generated by a source and this source produces a deterministic sequence of values whenever the program run. And if you want to random numbers for security-sensitive work, then use the crypto/rand package.
You are allowed to generate a slice of n ints which contains a non-negative pseudo-random permutation of the integers [0, n) from the default source with the help of the Perm() Function provided by the math/rand package. So, you need to add a math/rand package in your program with the help of the import keyword to access the Perm() function.
func Perm(n int) int
Let us discuss this concept with the help of the given examples:
Slice 1 Element: 0 Slice 1 Element: 1 Slice 1 Element: 2 Slice 1 Element: 3 Slice 2 Element: 1 Slice 2 Element: 2 Slice 2 Element: 0
Slice 1: [0 4 2 3 1] Length of Slice 1: 5 Capacity of Slice 1: 5 Slice 2: [4 1 5 0 3 2 6] Length of Slice 2: 7 Capacity of Slice 2: 7