Function类可以表示开发者定义的任何函数

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第一篇:Function类可以表示开发者定义的任何函数

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定义

Function类可以表示开发者定义的任何函数,用Function类直接创建函数的语法如下:

var function_name=new Function(agrument1,agrument2,...,argumentN,function_body);每个argument都是一个参数,最后一个参数是函数主体(要执行的代码)。

示例:

复制代码 代码如下:

function sayHi(sName,sMessage){

alert(“Hello ”+sName+“,”+sMessage);

}

还可以如下定义它:

var sayHi=new Function(“sName”,“sMessage”,“alert(”Hello“+sName+”,“+sMessage);”);

注:尽管可用Function构造函数创建函数,但最好不要使用它,因为用它定义函数比用传统方式要慢得多。不过,所有函数都应看作是Function类的实例。

属性和方法

因为函数是引用类型,所以它们也有属性和方法,ECMAScript定义的属性length声明了函数期望的参数个数,例如:

复制代码 代码如下:

function doAdd(iNum){

alert(iNum+10);

}

function sayHi(){

alert(“Hi”);

}

alert(doAdd.length);//outpus 1

alert(sayHi.length);//outpus 0

Function对象也有与所有对象共享的标准valueOf()方法和toString()方法,这两个方法返回的都是函数的源代码,在调试时尤其有用。

例如:

复制代码 代码如下:

function doAdd(iNum){

alert(iNum+10);

}

alert(doAdd.toString());

这段代码输出了doAdd()函数的文本。

闭包

定义

所谓闭包,是指词法表示包括不必计算的变量的函数,也就是说,该函数能使用函数外定义的变量。在ECMAScript中使用全局变量是一个简单的闭包实例。

示例:

复制代码 代码如下:

var sMessage=“Hello World”;

function sayHelloWold(){

alert(sMessage);

}

sayHelloWorld();

在一个函数中定义另一个函数会使闭包变得更复杂,如:

复制代码 代码如下:

var iBaseNum=10;

function addNumbers(iNum1,iNum2){

function doAddtion(){

return iNum1+iNum2+iBaseNum;

}

return doAddtion();

}

这里函数addNumbers()包括函数doAddtion()(闭包)。内部函数是个闭包,因为它将获取外部函数的参数iNum1和iNum2以及全局变量iBaseNum的值。addNumbers()的最后一步调用了内部函数,把两个参数和全局变量相加,并返回它们的和。这里要掌握的重要概念是doAddtion()函数根本不接受参数,它使用的是从执行环境中获取的。

可以看到,闭包是ECMAScript中非常强大多用的一部分,可以用于执行复杂的计算。就像使用任何高级函数一样,在使用闭包时要当心,因为它们可能会变得非常复杂。本文示例代码

复制代码 代码如下:

《JavaScript高级程序设计》读书笔记之八:Function类及闭包

Length:

valueOf()/toString():

闭包:

基础体温 女性随时了解自身健康的法宝 2012年09月08日 | 作者: songhoubo | 分类:|

简介:每个月的天是女性,而不是担心一天后,有时提前延迟,疼痛痛经冷汗泪水流在一起。

尤其是在冬天,裙子,裤子,等等,妇女往往因为爱美,而忽略了温暖,导致痛经加剧,还是有很多女性月经将被推迟,等。

温度不规则的月经周期紊乱,痛经闭经

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月经不动,周期紊乱,痛经,闭经等,其实是子宫出现一些不健康的因素,反映了外部。当这些不健康的因素表现为一些症状,表明他们已经开始对健康产生 了一定的影响。女人都希望尽快知道自己如果没有健康的因素,以避免对健康的影响,最简单的方法是测量基础体温。准妈妈们不知道基础体温可以帮助找到最好的 GET怀孕,但它也可以反映女性功能的变化,有利于发现,女性的健康问题。女人不应该只是希望当宝宝测量基础体温,应坚持很长一段时间的测量,让自己有一 个健康快乐的生活。

测量基础体温,容易提高健康宝宝

测量基础体温可以帮助准妈妈们找到自己的最佳GET怀孕,容易提高健康的宝宝。妇女基础体温在月经周期目前高温期和低温阶段两个阶段的变化。基础体 温高温相变温度的低温阶段之前和之后,在3-4天的准妈妈是怀孕的最佳时期。如果基础体温不高低温两相变化,说没有排卵,如果缺乏高温期是12天,黄体元 素分泌不足,更困难的概念。这些将导致雌性不育。同时,怀孕后基础体温持续高温,如果突然下降,可能是前兆流产。未准妈妈们发现,这些条件必须及时就医。

对比基础体温,发现健康问题,尽快

妇女应该坚持很长一段时间测量基础体温,相比以前的基础体温曲线,及时发现基础体温的异常变化,早在可能的健康问题。女性如果低温期或http:///基础体温是不 是稳定的高温期,日平均气温变化大,这可能是因为工作繁忙,疲劳,成都发票,心情不好的原因。这时候多休息,学会缓解压力,保持愉快的心情。如果比以往任 何时候整个身体温度下降,可能是因为子宫寒。子宫寒多的原因,可能是因为冬天穿的够温暖,夏天久坐空调房,吃生冷食物过多或过冷的食品,快速减肥是不是当 地的药物,这一次,及时关注生活,调整饮食,服装,等等。

观察基础体温快乐的单身汉迟早也会结婚,幸福地度过更年期

更年期妇女的基础体温测量也是非常重要的,观察基础体温的变化可以帮助女性过了更年期的幸福。更年期妇女绝经前绝经后一个较长的时间,每个女性更年 期开始时间是不同的,持续时间也不同。陷入衰退的卵巢功能强劲,妇女进入更年期后,雌激素分泌减少,卵泡成熟发生障碍,甚至不再排卵。在基础体温,可用于 高温期间的表现更短的时间,高低温温度差异较小的,即使没有高低温两相变化等观察基础体温变化,就可以知道,无论是作为尽快进入绝经期,尽快调整心态,准 备好让一个女性,以满足新的人生阶段。

测量基础体温,一定要使用女性专用体温计。女性专用体温计和普通的家用温度计的最大区别是,它可以显示2位小数,因为基础体温的温度变化差异较小,只能显示2位小数的温度计可以准确的测量。同时,它是一种测量口腔温度的温度计,因为口腔的温度更接近真正的人体温度,因此安全性也很重要,最好选择电子 体温计。今天,女性特殊的体温计不再是传统的“笔型”,也出现了一些人性化更方便女性专用体温计。如欧姆龙女性专用体温计MC – 440,形状如小化妆盒,它的大屏幕上自动生成基础体温变化曲线,让身体温度变化一目了然,超强的记忆功能,更方便的比较,60秒预测模型,大大缩短测量 时间,各种人性化的功能,更适合现代忙碌的女性。

健康资讯,女性健康,健康知识,罗兰院长健康知识网,养生之道,白领健康知识,健康,母婴知识,性生活

The basal body temperature of women to keep abreast of a magic weapon of their own health

September 8, 2012 | Author: songhoubo | Category: white-collar health |

Description: The day of the month is a woman, and not to worry about the day, sometimes ahead of time delay, dysmenorrhea pain cold sweat tears flow together.Especially in winter, skirts, pants, and so women often because of beauty, while ignoring the warm, resulting in dysmenorrhea intensifies, there are still a lot of female menstruation will be postponed, etc..Temperature irregular menstrual cycle disorders, dysmenorrhea, amenorrhea

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Menstruation does not move, cycle disorders, dysmenorrhea, amenorrhea, in fact some unhealthy factors uterus, reflects the external.When these unhealthy factors showed some of the symptoms, and that they have certain health.Women want to know as soon as possible of their own if there is no health factors, in order to avoid the impact of health, the easiest way is to measure basal body temperature.Mothers who do not know the basal body temperature can help find the best GET pregnant, but it can also reflect the changes in the function of the female, is conducive to the discovery, women's health issues.The woman should not just hope that when the baby basal body temperature measurement, should adhere to a long period of time measurement, so that they have a healthy and happy life.Measurement of basal body temperature, easy to improve the health of the baby

Measurement of basal body temperature can help mothers who find their own best GET pregnant, easy to improve the health of the baby.Women's basal body temperature changes in the high temperature phase of the menstrual cycle and the low-temperature phase of two phases.Before and after the basal body temperature high-temperature phase transition temperature of the low temperature phase, in the best period of 3-4 days, the expectant mother is pregnant.The basal body temperature is high and low temperature phase change, that there is no ovulation, if the lack of high-temperature period is 12 days, inadequate secretion of luteal elements, the more difficult concepts.These will lead to female infertility.Pregnant basal body temperature sustained high temperatures, if a sudden drop may be a precursor to abortion.Not expectant mothers, these conditions must be timely medical treatment.Contrast basal body temperature found health problems as soon as possible

Women should adhere to a long period of time to measure basal body temperature, compared to the previous basal body temperature curve, to detect abnormal changes in basal body temperature, as early as possible health problems.Women if the period of cold or basal body temperature is not stable high temperature period, the average daily temperature changes, this may be because of busy work, fatigue and mental stress, bad mood reason.This time to rest, learn to relieve stress and maintain a happy mood.Entire body temperature drops, more than ever, it might be cold

because the uterus.Uterine cold winter wear warm enough in summer sedentary air-conditioned rooms, eat too much cold food or cold food, fast weight loss is not a local drug, this time, life concerns in a timely manner, adjusting the diet, clothing, and so on.Observe the basal body temperature and happy man should marry happily through menopause

Menopausal women, basal body temperature measurement is also very important, the observed changes in basal body temperature can help women after menopause happiness.Menopausal women menopause before menopause after a longer time, each female menopause start time, duration.Strong recession ovarian function, women enter menopause, estrogen secretion reduce follicular maturation occurs obstacles, and even longer ovulation.In basal body temperature, can be used for high temperature during the performance of a shorter time, the high cryogenic temperature differences smaller, even in the absence of both high and low temperature phase change observed changes in basal body temperature, you can know whether it is as soon as possible to enter menopause, as soon as possible to adjust mentality, ready for a female, to meet a new stage of life.Measure basal body temperature, be sure to use the women-only thermometer.The women-only thermometer and ordinary household thermometer biggest difference is that it can display two decimal places, because the temperature changes of the basal body temperature differences, can only display two decimal thermometer can accurately measure.The same time, it is a measurement of the oral temperature thermometer, closer to the true body temperature because the temperature of the mouth, so the security is also very important, the best choice electronic thermometer.Today, women's special thermometer is no longer the traditional ”pen type", there have been some humanity more convenient women dedicated thermometer.Such as Omron women dedicated thermometer MC-440, shape, such as a small cosmetic case, it's the big screen on automatic generation of basal body temperature curve, changes in body temperature at a glance, super memory function, more convenient comparison, 60 seconds forecasting model greatly shorten the measurement time, a variety of user-friendly features, more suitable for the busy modern women.Health information, women's health, health knowledge, health knowledge network Roland Dean, good health, and the white-collar health knowledge, health, maternal and child knowledge, sexual life

第二篇:定义一个表示用户的User类

//定义一个表示用户的User类,类中的变量有用户名、口令和记录用户个数的变量,定义类的3个构造方法(无参、为用户名赋值、为用户名和口令赋值)、获取和设置口令的方法和返回类信息的方法 class User { private String name;private String password;private static int count=0;public User(){

count++;} public User(String name){

count++;

this.name=name;} public User(String name,String password){

count++;

this.name=name;

this.password=password;} public String getName(){

return name;} public void setName(String name){

this.name=name;} public String getPassword(){

return password;} public void setPassword(String password){

this.password=password;} public void print(){

System.out.println(“用户个数:”+count);

System.out.println(“用户名:”+this.name+“t”+“密码:”+this.password);} } public class Test05 { public static void main(String args[]){

User user1=new User();

user1.print();

User user2=new User(“二狗”);

user2.print();

User user3=new User(“狗剩”,“asbc”);

user3.print();} }

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