@marchingy/lunar/lib/tool.js

Chinese calendar with the 24 solar terms.

export function toPrecision(value, precision) {
    const p = Math.pow(10, precision);
    return Math.round(value * p) / p;
}
/**
 * Whether the provided value is considered a number.
 * @docs-private
 */
export function isNumberValue(value) {
    // parseFloat(value) handles most of the cases we're interested in (it treats null, empty string,
    // and other non-number values as NaN, where Number just uses 0) but it considers the string
    // '123hello' to be a valid number. Therefore we also check if Number(value) is NaN.
    return !isNaN(parseFloat(value)) && !isNaN(Number(value));
}
export function coerceInteger(value, fallbackValue = 0) {
    return isNumberValue(value) ? (value > 0 ? Math.floor(value) : Math.ceil(value)) : fallbackValue;
}
/**
 * Compares two dates.
 * @param first The first date to compare.
 * @param second The second date to compare.
 * @returns 0 if the dates are equal, a number less than 0 if the first date is earlier,
 *     a number greater than 0 if the first date is later.
 */
export function compareDate(first, second) {
    return (first.getFullYear() - second.getFullYear() ||
        first.getMonth() - second.getMonth() ||
        first.getDate() - second.getDate());
}
/**
 * Checks if two dates are equal.
 * @param first The first date to check.
 * @param second The second date to check.
 * @returns Whether the two dates are equal.
 *     Null dates are considered equal to other null dates.
 */
export function sameDate(first, second) {
    if (first && second) {
        return !compareDate(first, second);
    }
    return first == second;
}
export function printDebug(fun, on) {
    on && console.info(typeof fun === 'function' ? fun() : fun);
}