random-object/src/util.js

Generates a js object of random depth and width for testing purposes

// Depth: number of nested object in a given object
const objDepth = (obj, acc = 0) => {
    // Filter object by keys containing child objects
    const objectValues = Object.keys(obj).filter(key => { return typeof obj[key] === 'object' })
    // if no child objects are found return the current object depth
    if (objectValues.length === 0)
	return acc

    // else recursively call objDepth increasing the current object depth
    // compile these depths into an array of each key's final discovered child object depth
    // finally return the maximum depth discovered
    return objectValues.reduce((keyDepths,key) => { 
	                 const ret = keyDepths.concat(objDepth(obj[key], ++acc))
                         acc = 0
                         return ret }, [])
                       .reduce((a,b) => (Math.max(a,b)))
}

// Width: number of keys in a given object
const objWidth = (obj) => {
    return Object.keys(obj).length
}

const randomMax = (max) => {
    return Math.floor(Math.random() * max) + 1
}

const random1To10 = () => {
    return Math.floor(Math.random() * 10) + 1
}

const alphaNumerics = () => {
    return ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','0','1','2','3','4','5','6','7','8','9']
}

const randomAlphaNumeric = (length = 5) => {
    const ret = [];
    for (let i = 0; i < length; i++) {
	const rando = Math.floor(Math.random() * 36)
	ret.push(alphaNumerics()[rando])
    }
    return ret.join('')
}

module.exports = {
    objDepth,
    objWidth,
    random1To10,
    randomMax,
    randomAlphaNumeric,
}