JAVASCRIPT随记-使用偏函数判断对象类型

//生成偏函数的函数
var isType = function(type){
return function(obj){
return toString.call(obj)=='[object '+type+']';
}
};
//生成偏函数
var isArray= isType('Array');
var isBoolean = isType('Boolean');
var isFunction = isType('Function');
var isNumber = isType('Number');

//使用偏函数
var isArray_ = isArray(['a','d']);
var isBoolean_ = isBoolean(true);
var isFunction_ = isFunction(isType);
var isNumber_ = isNumber(888);

alert("['a','d'] is an Array?"+isArray_);
alert("true is a Boolean? "+isBoolean_);
alert('isType is a Function?'+isFunction_);
alert('888 is a Number?'+isNumber_);