判断参数是否不为空

判断参数是否为空, 包括null, undefined, [], '', {}
obj 需判断的对象

export function isNotEmpty(obj) {
    var empty = false;

    if (obj === null || obj === undefined) {    // null and undefined
        empty = true;
    } else if ((isArray(obj) || isString(obj)) && obj.length === 0) {
        empty = true;
    } else if (isObject(obj)) {
        var hasProp = false;
        for (let prop in obj) {
            if (prop) {
                hasProp = true;
                break;
            }
        }
        if (!hasProp) {
            empty = true;
        }
    }
    return !empty;
}

function _getClass (object) {
    return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
}
export function isObject (obj) {
    return _getClass(obj).toLowerCase() === 'object';
}

优化后：

       function isObject(obj){
          return  Object.prototype.toString.call(obj).match(/^\[object\s(.*)\]$/)[1].toLowerCase() === 'object';
        }  

        function isNotEmpty(obj){
            var empty = true;
            if(obj === null || obj===undefined||obj==='null'){
                empty = false;
            }else if(Array.isArray(obj) && obj.length === 0){
                empty = false;
            }else if(isObject(obj)){
                  for(let prop in obj){
                      if(prop){
                        var empty = true;
                      }
                  }
            }
            return empty
        }