src/to/toNumber.ts
import isObject from '~/is/isObject'
import isSymbol from '~/is/isSymbol'
import { reIsBadHex, reIsBinary, reIsOctal, reTrim } from '~/core/vars'
/**
* Converts `value` to a number.
* @example
*
* toNumber(3.2);
* // => 3.2
*
* toNumber(Number.MIN_VALUE);
* // => 5e-324
*
* toNumber(Infinity);
* // => Infinity
*
* toNumber('3.2');
* // => 3.2
*/
export default function toNumber(value: any): number {
if (typeof value === 'number') {
return value
}
if (isSymbol(value)) {
return NaN
}
if (isObject(value)) {
const other = typeof value.valueOf === 'function' ? value.valueOf() : value
value = isObject(other) ? other + '' : other
}
if (typeof value !== 'string') {
return value === 0 ? value : +value
}
return stringToNumber(value)
}
export function stringToNumber(value: string): number {
value = value.replace(reTrim, '')
const isBinary = reIsBinary.test(value)
return isBinary || reIsOctal.test(value)
? parseInt(value.slice(2), isBinary ? 2 : 8)
: reIsBadHex.test(value)
? NaN
: +value
}
export function booleanToNumber(value: boolean): number {
return +value
}