JavaScript: Generating Random Text with Letters and Numbers

Without further ado, I typed this coding on something. Here goes, a function named generateSomething:

/** * Generates random sequence of letters * (lowercase and uppercase) and numbers. * * @param {number} [a=6] - Length of the generated sequence. * Must be a positive integer. * @returns {string} A random string of the specified length. * */ function generateSomething(a) { let letters = "abcdefghijklmnopqrstuvwxyz"; let numbers = "0123456789"; let upperCase = letters.toUpperCase(); let length = 6; const result = []; if ( a?.constructor === Number && a > 0 && a % 1 === 0 ) length = a; const splitt = (a) => a.split(""); const randomise = (a) => { const l = a.length; const ix = Math.floor(Math.random() * l); return a[ix]; }; letters = splitt(letters); numbers = splitt(numbers); upperCase = splitt(upperCase); const combination = [letters, numbers, upperCase]; const charPicker = () => { const whichOne = randomise(combination); const whatCharacter = randomise(whichOne); return whatCharacter; }; for (let i = 0; i < length; i += 1) { result.push(charPicker()); } return result.join(""); }

I suppose you could examine the flow in the typing above.

The function generateSomething will generate something.

It can receive an argument input, which must be an integer from 1 to unlimited. If the input isn't an integer or it's below 1, the argument will be ignored.

The default length for the generated something (output) is 6.

---

How to Use

function generateSomething(a) { ... // the function block above } // Try it on browser console, to see the output. generateSomething(8);

---

What is That For?

To generate something of course. Ah... 🤔