megautils-js/src/currencyUtils.js

## Project Description

/**
 * @func 金额类工具
 */
const NP = require('number-precision')


module.exports = {
    // MARK - Public
    // ************************************************************************
    /**
     * @func 数组转换成显示金额
     * @param {Int} num
     * @returns
     */
    get_currency(num) {
        let new_num = 0
        if (num > 0) {
            // new_num = Math.floor(num * 100) / 100
            new_num = NP.divide(Math.floor(NP.times(num, 100)), 100)
        } else {
            // new_num = - (Math.floor(-num * 100) / 100)
            new_num = - NP.divide(Math.floor(NP.times(-num, 100)), 100)
        }
        return new_num
    },

    /**
     * @func 展示金额小数点2位
     * @param {Int} num
     */
    display_currency(num) {
        return Number.parseFloat(num).toFixed(2)
    },

    /**
     * @func 展示大额金额
     * @param {Int} num
     */
    display_large_currency(num) {
        if (typeof num !== 'number') {
            num = parseFloat(num) || 0;
        }
        return num.toLocaleString(undefined, {
            minimumFractionDigits: 2,
            maximumFractionDigits: 2
        });
    },


    /**
     * 金额 -> int * 100
     * @param {*} x
     */
    currency_to_int_times_100(x) {
        x *= 100
        x = Math.round(x)
        return x
    },

    /**
     * int -> 金额 / 100
     * @param {*} x
     */
    currency_int_to_currency_divide_100(x) {
        x = Math.round(x)
        x = NP.divide(x, 100)
        return x
    }

}