javascript中的设计模式之策略模式

/**
 * 计算工资方法
 * @param level 等级
 * @returns {number} 工资
 */
function getSalary(level){
    var basicSalary = 3000; // 基本工资
    var allowance = 2000;   // 补助
    var bonus = 10000;  // 分红
    if(level === "P5"){
        return basicSalary;
    }else if(level === "P6"){
        return basicSalary * 1.2;
    }else if(level === "P7"){
        return basicSalary * 1.5 + allowance;
    }else if(level === "P8"){
        return basicSalary * 2 + allowance + bonus;
    }else{
        return basicSalary * 3 + allowance + bonus * 2;
    }
}
getSalary("P6");   // 3600
getSalary("P7");  // 18000;
getSalary("P8");  // 31000;

// 策略类
var salaryStrategy = {
    basicSalary: 3000,
    allowance: 2000,
    bonus: 10000,
    "P5": function () {
        return this.basicSalary;
    },
    "P6": function () {
        return this.basicSalary * 1.2;
    },
    "P7": function () {
        return this. basicSalary * 1.5 + this.allowance;
    },
    "P8": function () {
        return this.basicSalary * 3 + this.allowance + this.bonus * 2;
    }
};

// 执行环境
function getSalary(level){
    return salaryStrategy[level]();
}

getSalary("P5");   // 3000
getSalary("P6");   // 3600
getSalary("P8");   // 31000

export type EasingFunction = (amount: number) => number

/**
 * The Ease class provides a collection of easing functions for use with tween.js.
 */
const Easing = {
    Linear: {
        None: function (amount: number): number {
            return amount
        },
    },
    Back: {
        In: function (amount: number): number {
            const s = 1.70158
            return amount * amount * ((s + 1) * amount - s)
        },
        // ...
    },
    Bounce: {
        In: function (amount: number): number {
            return 1 - Easing.Bounce.Out(1 - amount)
        }
        // ...
    },
}
export default Easing

// 点数据
var pointData = {
    type: "Point",  // 图形类型
    geography: [40,130] // 经纬度
};
// 线数据
var lineData= {
    type: "Line",  // 图形类型
    geography: [[40,130],[40.3,130.4],[43.2,134.3]] // 经纬度
};
// 椭圆数据
var ellipseData = {
    type: 'Ellipse',
    geography: {
        centerPoint: [40,130],  // 椭圆中心点
        xAxis: 300, // 横轴长度
        yAxis:400,  // 纵轴长度
        angel: 45   // 偏转角度
    }
}