Question

我对PHP很好，但javascript对我不好，我的英语也不是很好，但我一步一步地解释一切最好和慢慢。我使用javascript计算电信服务的费用。我知道在php中必须使用类似的逻辑然后我卡住了。

  /prices is json from server as see below.
var prices  =   [{"brand":"Airtel (Waridtel) Ug","numbering":"25670","price":"40"},
                 {"brand":"UTL ug","numbering":"25671","price":"30"},
                 {"brand":"Airtel Ug","numbering":"25675","price":"40"},
                 {"brand":"MTN Ug","numbering":"25677","price":"20"},
                 {"brand":"MTN Ug","numbering":"25678","price":"20"},
                 {"brand":"Orange Ug","numbering":"25679","price":"30"},
                 {"brand":"Safaricom Ke","numbering":"25470","price":"30"},
                 {"brand":"Safaricom Ke","numbering":"25471","price":"30"}]

用户以逗号分隔字符串

提供各种电话号码

   //contacts
   cdest = '245772306640,256754306640,25471624525,2567825689754,2563989654285,4588623566', 256782658974;

我们使用品牌前缀来寻找品牌。如果联系人前缀相当于json中的价格编号，那么这就是该品牌所拥有的conctact。我根据用户提供的联系人列表计算每个品牌的联系人数和总费用。

期望输出如下所示。品牌（联系人数量）::总费用示例MTN Ug（3）:: 60，Airtel Ug（1），Safaricom Ke（1）:: 30，

我也想在没有品牌的情况下放置任何没有品牌的数字，这个品牌被称为国际，没有价格分配，如下例所示国际（2）::默认，

这里我非常混淆两个循环，我不明白我怎么可以循环，计数和回声但我很好转移PHP知识到目前为止我创建双循环，但后来我再次混淆。

//explode numbers;
dest =  cdest.split(",");

// loop through brands and numbers. 
//plan is to create create array like (brand1 =>countbrand1,brand2=>countbrand3, etc)

cd = Array();
for( var i=0; i<dest.length; i++ )
{
    $x.each(prices, function(index, m) {
        if(dest[i].indexOf(m.numbering)==0)
        {
            cd[m.brand]+=1; 
        } else
        cd[International]+=1;
        });
}

在php中，我现在只需在cd上循环并获得输出。我尝试使用js，但不知道如何在Javascript中回显数组的键。 javascript整天欺负我。如果你得到了很好的答案，请逐步展示。我非常感谢。

Answer 1

在php数组中用于很多东西，但在javascript数组中没有键。对象呢。你在prices变量中拥有的是一个对象数组。要循环对象，可以使用以下语法：

for (var key in p) {
  // do something
  // the key has the name `key` and to get the value, you
  // can type p[key]
}

这是你的内循环。你得到了正确的外环。这是您使用名称dest：

循环数组的方法

for( var i=0; i<dest.length; i++ ) {
     var member = dest[i];
     // do something with member
}

使用外部循环，我们将获取数组中的每个对象，并将其分配给名为member的变量。（当然，你可能会想到一个更好的名字）所以你的最终代码必须看起来像这样：

for( var i=0; i<dest.length; i++ ) {
    var memeber = dest[i];
    for (var key in member) {
       // do something with the keys and values - print them for example.
    }
}

Answer 2

您可以检查我从您的代码创建的这个小提琴。可以帮到你 http://jsfiddle.net/GSeZ9/

var prices  =   [{"brand":"Airtel (Waridtel) Ug","numbering":"25670","price":"40"},
                 {"brand":"UTL ug","numbering":"25671","price":"30"},
                 {"brand":"Airtel Ug","numbering":"25675","price":"40"},
                 {"brand":"MTN Ug","numbering":"25677","price":"20"},
                 {"brand":"MTN Ug","numbering":"25678","price":"20"},
                 {"brand":"Orange Ug","numbering":"25679","price":"30"},
                 {"brand":"Safaricom Ke","numbering":"25470","price":"30"},
                 {"brand":"Safaricom Ke","numbering":"25471","price":"30"}];

var cdest = '245772306640,256754306640,25471624525,2567825689754,2563989654285,4588623566, 256782658974';

var dest =  cdest.split(",");

// loop through brands and numbers. 
//plan is to create create array like (brand1 =>countbrand1,brand2=>countbrand3, etc)

var cd = {};
for( var i=0; i<dest.length; i++ )
{
    $.each(prices, function(index, m) {
       // if(dest[i].toString().indexOf(m.numbering.toString()) != -1 )
            //alert(dest[i].indexOf(m.numbering));
        if(dest[i].toString().indexOf(m.numbering.toString()) == 0)
        {
            if( cd[m.brand] == undefined)
                   cd[m.brand] = 1;
            else
                cd[m.brand]+=1; 
        } //else
            //cd[International]+=1;
        });
}
for (var key in cd) {
   alert(key + " = " + cd[key]);
}

Javascript在循环中循环逻辑以生成特定输出

2 个答案: