Julia 1.0 Programming Complete Reference Guide

Setting up our modules

Let's start by editing Letters.jl to make it look like this:

module Letters 
 
using Random 
 
export randstring 
 
const MY_NAME = "Letters" 
 
function rand() 
  Random.rand('A':'Z') 
end 
 
function randstring() 
  [rand() for _ in 1:10] |> join 
end 
 
include("module_name.jl") 
 
end 

Here, we have defined a module called Letters. In it, we added a rand function that uses Julia's Random.rand to return a random letter between A and Z in the form of a Char. Next, we added a function called Letters.randstring, which returns a String of 10 random characters. This string is generated using a Char[] array comprehension (the _ variable name is perfectly legal in Julia and, by convention, it designates a variable whose value is not used) which is ...