massCode
Number
Is Number
This snippet can be used to check whether a provided value is a number.
js
const isNumber = n => !isNaN(parseFloat(n)) && isFinite(n)
Example
js
isNumber('1') // false
isNumber(1) // true
Is Square
This snippet can be used to check if a number is a square.
js
const isSquare = n => n >= 0 && Math.sqrt(n) % 1 === 0
Example
js
isSquare(36) // true
Round
This snippet can be used to round a number to a specified number of digits.
js
const round = (n, decimals = 0) =>
Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`)
Example
js
round(24.99, 1) // 25