garyvv / node-sharp

module.exports = {

    isEmpty: async function(value) {

        return (Array.isArray(value) && value.length === 0) ||

            (Object.prototype.isPrototypeOf(value) && Object.keys(value).length === 0)

    },

    /**

     * 二进制转十进制

     */

    bindec: async function(binNum) {

        let result = 0

        let total = binNum.length

        for (let index = 1; index <= total; index++) {

            let tmp = binNum.slice(total - index, total - index + 1)

            let tmpAdd = parseInt(tmp) * parseInt(Math.pow(2, index - 1))

            result += tmpAdd

        }

        return result

    },

    /**

     * 

     */

    today: async function(symbol = '') {

        let date = new Date()

        return date.getFullYear() + symbol + (date.getMonth() < 10 ? '0' + (date.getMonth() + 1) : (date.getMonth() + 1)) + symbol + (date.getDate() < 10 ? '0' + date.getDate() : date.getDate())

    },

    versionCompare: function(v1, v2) {

        let version1pre = parseFloat(v1)

        let version2pre = parseFloat(v2)

        let version1next = v1.replace(version1pre + ".", "")

        let version2next = v2.replace(version2pre + ".", "")

        if (version1pre > version2pre) {

            return true;

        } else if (version1pre < version2pre) {

            return false;

        } else {

            if (version1next >= version2next) {

                return true;

                return false;

            }

        }

    },

    checkObject: function(object, fields, tips) {

        let result = {}

            object = JSON.parse(object)

        }

        fields.forEach(element => {

            }

            result[element] = object[element]

        })

        return result

    },

}