javascript - js 字符串转换为具有两个值的对象

Question

我正在尝试解决一个挑战，但它是致命的。我需要将字符串更改为对象。

像这样:

 { Cape Town : 9,
   George : 7,  
   Johannesburg : -1, 
   Port Elizabeth : 5
  }

但目前它返回给我的是:

 {
    Cape Town 9: undefined,
    George 7: undefined,
    Johannesburg -1: undefined,
    Port Elizabeth 5: undefined
 }

这是我当前的代码:

 var str = "Look at this tomorrow it will be really cold all over the country
 in Cape Town 9, in George 7, in Port Elizabeth 5 and in, Johannesburg -1"


var remove = str.replace("Look at this tomorrow it will be really cold all    over the country:", "")
.replace(" in", "").replace("in ", "").replace("in ", "").replace(" and in",     "")

var properties = remove.split(', ');
var obj = {};
properties.forEach(function(property) {
  var tup = property.split(':');
  obj[tup[0]] = tup[1];
});

console.log(obj)

Answer 1

这是一个较短的解决方案:

var str = "Look at this tomorrow it will be really cold all over the country in Cape Town 9, in George 7, in Port Elizabeth 5 and in, Johannesburg -1",
  cities = str.match(/in[\w, ]+?-?\d/g),
  output = {};

for (var i = 0; i < cities.length; i++) {
  var city = cities[i].replace(/in,? /, ''),   // Remove the `in` from the current city.
      split = city.split(' '),                // Split at [space]
      temp = split.pop();                    // Get the last item from the split string, which is the temperature.
  output[split.join(' ')] = parseInt(temp); // Store the temperature for the city name.
}

console.log(output);

城市 结果:
[“在开普敦 9”、“在乔治 7”、“在伊丽莎白港 5”、“在约翰内斯堡 -1”]

然后 for 循环只是迭代这些并从中获取城市名称和温度，然后将其存储到输出。