Faker. Js Random Number Between 2 Values
This One Is Driving Me a Little Mad, I'm Sure It's Simple but It Doesn't Seem to Be Documented Anywhere. Im Using Faker. Js and the Following to Generate My...
This one is driving me a little mad, I'm sure it's simple but it doesn't seem to be documented anywhere.
Im using Faker.js and the following to generate my random number:
faker.random.number();
Works great, now if I want to do it between 2 numbers, how would I go about this?
I tried the following:
faker.random.number(10, 50);
However, that just gives me numbers from 0 to 10. No idea what the 50 is doing.
Can anyone give me some directions to this please.
5 Answers
Update 2023 for v8
Now moved to , they changed it again:
faker.number.int(options: number | {
max: number,
min: number
} = {}): number
faker.number.int() // 2900970162509863
faker.number.int(100) // 52
faker.number.int({ min: 1000000 }) // 2900970162509863
faker.number.int({ max: 100 }) // 42
faker.number.int({ min: 10, max: 100 }) // 57
source:
Update 2021
Latest versions changed location of the function from faker.random.number to faker.datatype.number,
Original answer
You need to give an object to the function:
faker.datatype.number({
'min': 10,
'max': 50
});
So if you just pass a number, it will set it as the max value. The min value is 0 by default.
This is the implementation of the number function :
this.number = function (options) {
if (typeof options === "number") {
options = {
max: options
};
}
options = options || {};
if (typeof options.min === "undefined") {
options.min = 0;
}
if (typeof options.max === "undefined") {
options.max = 99999;
}
if (typeof options.precision === "undefined") {
options.precision = 1;
}
// Make the range inclusive of the max value
var max = options.max;
if (max >= 0) {
max += options.precision;
}
var randomNumber = options.precision * Math.floor(
mersenne.rand(max / options.precision, options.min / options.precision));
return randomNumber;
}
From Fakerjs github
Whole Number faker. random.number(min,max) Random number between 0 and "range".
faker.random.number(100); //returns 92
faker.random.number({min:5, max:10}); //returns 9
Decimal number faker. finance.amount(min,max,decimal places) Random number between "min" and "max" including decimals to X digits.
faker.finance.amount(9000,10000,4); //returns 9948.8363
Boolean faker. random.boolean()
faker.random.boolean(); //returns true
Array Element faker. random.arrayElement(array[]) Selects a random element from an array of possible values. This function is useful to create custom lists of possibilities.
faker.random.arrayElement(["one","two","three","four"]); //returns "two"
var phTyp = faker.random.arrayElement(["cell","work","home"]); //returns "work"
Object Element faker. random.objectElement(object{}) Selects a random element from an object, selects the value not the keys. This function is useful to create custom lists of possibilities.
faker.random.objectElement({one: 1, two: 2, three: 3}); //returns 3
I encountered a warning while running the faker.random.number function in my application using [email protected].
Deprecation Warning: faker.random.number is now located in faker.datatype.number
The methods have been moved. A better fix would be to replace it with faker.datatype.number().
faker.datatype.number(100); // return 88
faker.datatype.number({ min: 5, max: 10 }); // return 7
try passing a hash like below
faker.random.number({ min: 10, max: 50})
My solution was to use this library:
and in addition to that, it creates these methods that it needed and that the library does not currently support.
export function getCreditCardBrand(): string {
const brands = [
'Visa',
'MasterCard',
'American Express',
'Discover',
'JCB',
'Diners Club',
];
const randomIndex = Math.floor(Math.random() * brands.length);
return brands[randomIndex];
}
export function getBoolean(): boolean {
const booleans = [true, false];
const randomIndex = Math.floor(Math.random() * booleans.length);
return booleans[randomIndex];
}
export function getRandomElement<T>(items: T[]): T {
return items[Math.floor(Math.random() * items.length)];
}
interface NumberRange {
min: number;
max: number;
}
export function getRandomNumber(range: NumberRange): number {
return Math.floor(Math.random() * (range.max - range.min + 1)) + range.min;
}
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