向后计算Javascript数组 [英] Calculate backwards in a Javascript array

问题描述

这里是我目前正在工作的JsFiddle .

我有2个产品1 and 2

然后我必须为用户选择3种样式的产品:s1,s2 and s3

Then I have 3 STYLES for those products a user MUST select : s1,s2 and s3

然后，我有了一个价格表，该价格表会随着人们选择的数量和样式而变化.见下文

Then I have table of prices that changes with the quantity and style people choose. See below

这是我的数组.

数量

Quantity : [ 50, 100, 150, 200, 250]

所有3种样式的商品1的价格

p1s1 : [2.00, 1.80, 1.60, 1.40, 1.20] p1s2 : [2.10, 2.00, 1.80, 1.60, 1.40] p1s3 : [2.25, 2.15, 2.05, 1.95, 1.75]

p1s1 : [2.00, 1.80, 1.60, 1.40, 1.20] p1s2 : [2.10, 2.00, 1.80, 1.60, 1.40] p1s3 : [2.25, 2.15, 2.05, 1.95, 1.75]

所有3种样式的产品2价格

p2s1 : [3.00, 2.80, 2.60, 2.40, 2.20] p2s2 : [3.10, 3.00, 2.80, 2.60, 2.40] p2s3 : [3.50, 3.30, 3.00, 2.80, 2.50]

p2s1 : [3.00, 2.80, 2.60, 2.40, 2.20] p2s2 : [3.10, 3.00, 2.80, 2.60, 2.40] p2s3 : [3.50, 3.30, 3.00, 2.80, 2.50]

这里是我目前正在使用JsFiddle的.

我的问题

我想创建一个可以向后工作的新计算器.也就是说，当某人输入手中的金额时，例如250美元，计算器应显示某人可以用这些钱购买多少个(数量)产品1s和2s.因此它应该显示如下.

I want to create a new calculator that works backwards. That is, when someone inputs the amount of money they have in hand, let's say $250, the calculator should display how many (quantity) Product 1s and 2s someone can purchase with that money. So it should display like below.

产品1，样式1-数量150 = $ 240

产品1，样式2-数量138 = $ 248.40

产品1，样式3-数量121 = $ 248.05

让我知道我是否不清楚.提前非常感谢.

Let me know if Im not clear. Thanks so much in advance.

推荐答案

function getAffordibiltyObject(OB, money)
{
    var afford = {};
    for (var code in OB){
        if(/p\ds\d/.test(code)){
            for (var i=0; i<OB[code].length; i++){
                if(money < OB[code][i]*OB.qtty[i] || i==OB[code].length-1){
                    var price = OB[code][i];
                    var quantity = Math.floor(money/price);
                    var total = quantity*price;
                    afford[code] = [quantity, total];
                }
            }
        }
    }

    return afford;
}


var OB = {
    wrap : 0.05,
    // quantities
    qtty : [  50,  100,  150,  200,  250],
    // product 1
    p1s1 : [2.00, 1.80, 1.60, 1.40, 1.20],
    p1s2 : [2.10, 2.00, 1.80, 1.60, 1.40],
    p1s3 : [2.25, 2.15, 2.05, 1.95, 1.75],
    // product 2
    p2s1 : [3.00, 2.80, 2.60, 2.40, 2.20],
    p2s2 : [3.10, 3.00, 2.80, 2.60, 2.40],
    p2s3 : [3.50, 3.30, 3.00, 2.80, 2.50]
};

var money = 250;


var affordibilityOB = getAffordibiltyObject(OB, money);

这就是您要寻找的affordabilityabilityOB将是一个具有p1s1，p2s2等键的对象，并且值将是一个长度为两个的数组，第一个元素为结果数量，第二个为结果总计.

This is what you are looking for affordibilityOB will be an object with keys like p1s1 , p2s2 ... and the values will be an array of length two first element being result quantity and second being result total.

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