Hello. Today I am going to share with you this very interesting and simple package to be implemented the “Random-Number.
https://www.npmjs.com/package/random-number
If you are unable to implement it in your project, leave your doubts in the comments that I will answer as soon as possible.
install
npm install random-number
usage
var rn = require('random-number');rn(); // sample output → 0.704848874360323 # yes, this is just Math.random(), but it has some options
default options
the exported function takes an option object with 3 meaningful properties
- min : smallest possible value to return. defaults to 0 or max – 1 if max is defined
- max : largest possible value to return. defaults to 1 or min + 1 if min is defined
- integer : do you want whole numbers to be returned, or not.
defaults to false
Examples
all three
// this is the functionality i like the mostvar rn = require('random-number');var options = { min: -1000, max: 1000, integer: true}rn(options) // example outputs → -187, 636
If you need the same (or almost the same settings many time) you can create a generator instead of passing the options over and over again
var rn = require('random-number');var gen = rn.generator({ min: -1000, max: 1000, integer: true})gen() // example outputs → -350
What is neat about generators, that you can overwrite any of the settings
generator( min, max, integer) – all arguments are optional:
var rn = require('random-number');var gen = rn.generator({ min: -1000, max: 1000, integer: true})gen(500) // example outputs → 735gen(500, null, false) // example outputs → 828.6001032683998
only min
var rn = require('random-number');var options = { min: 9874316514 // example input}rn(options) // example output → 9874316514.958157
only max
var rn = require('random-number');var options = { max: -9874316514 // example input , yes negative values do work}rn(options) // example output → -9874316514.075052
only integer
var rn = require('random-number');var options = { integer: true}// this is basically a true/false random generator, with 50% chance to return truern(options) // example output → 1
min and max
var rn = require('random-number');var options = { // example input , yes negative values do work min: -10, max: -1}rn(options) // example output → -2.47377512534149
min and integer or max and integer
// completely pointless, but whatevervar rn = require('random-number');var options = { min: 1000, integer: true}rn(options) // example output → 1001options = { max: 1000, integer: true}rn(options) // example output → 999
Top comments (2)
Why would you need a package for this scenario if you could do:
A package less, and only 1 line of code :)
In my opinion, it's not good to use packages which are doing very obvious things, you can easily implement these and you have more control if you want to change it later. (but that's my opinion)
Or if you want to use it to create fake data for a DB seed, you could use faker which has the same functionality.
A pseudo-random number generator that you cannot seed is not very useful.
I'd recommend looking for one for which you can supply a seed value -- perhaps 'prando'.