Question

我无法找到一种在objectMap中循环对象的方法，以便给出它收集的果实的最高价值。我的问题是，如何使用{{1}获得最高值的循环}循环。我在下面添加了我的代码。我已经停止了for in循环

var fruitString = 'Banana,Banana,Pear,Orange,Apple,Melon,Grape,Apple,Banana,Grape,Melon,Grape,Melon,Apple,Grape,Banana,Orange,Melon,Orange,Banana,Banana,Orange,Pear,Grape,Orange,Orange,Apple,Apple,Banana'

  var fruitList = fruitString.split(',')
  var fruitMap = {};

  function soldfruits(){ 

    for (var i = 0; i < fruitList.length; i++) {
        var currentFruit = fruitList[i]
    if (fruitMap[currentFruit] === undefined) {// cehck if fruit is not available
         fruitMap[currentFruit]= 0;
        }
        fruitMap[currentFruit] = fruitMap[currentFruit] +1
    }
    console.log(fruitMap);
  }

  soldfruits(fruitMap); // calling function for check.

  for (var fruits in fruitMap) {
    if ( ) {

       }
  }

Answer 1

试试这个：

var fruitString = 'Banana,Banana,Pear,Orange,Apple,Melon,Grape,Apple,Banana,Grape,Melon,Grape,Melon,Apple,Grape,Banana,Orange,Melon,Orange,Banana,Banana,Orange,Pear,Grape,Orange,Orange,Apple,Apple,Banana'

var fruitList = fruitString.split(',')
var fruitMap = {};

function soldfruits(){
for (var i = 0; i < fruitList.length; i++) {
    var currentFruit = fruitList[i]
if (fruitMap[currentFruit] === undefined) {
     fruitMap[currentFruit]= 0;
    }
    fruitMap[currentFruit] = fruitMap[currentFruit] +1
}
console.log(fruitMap);
return fruitMap
}


var fmap = soldfruits(fruitMap);

var high = 0
var high_name = ''
for(var x in fmap)
{
    if(fmap[x] > high)
    {
         high = fmap[x]
         high_name = x
    }
}
console.log(high + ' ' + high_name)

Answer 2

如果if(csvData[i][j] == null){ csvData[i][j]= ''; }的值为fruitList，则可以使用Array#forEach进行循环并检查。如果不取零，否则取值为propery并加一个。然后分配给该属性。

＆＃13;

fruit

＆＃13;

var fruitString = 'Banana,Banana,Pear,Orange,Apple,Melon,Grape,Apple,Banana,Grape,Melon,Grape,Melon,Apple,Grape,Banana,Orange,Melon,Orange,Banana,Banana,Orange,Pear,Grape,Orange,Orange,Apple,Apple,Banana',
    fruitList = fruitString.split(','),
    fruitMap = {},
    highest = 0;

fruitList.forEach(function (fruit) {
    fruitMap[fruit] = (fruitMap[fruit] || 0) + 1;
    if (fruitMap[fruit] > highest) {
        highest = fruitMap[fruit];
    }
});

console.log(fruitMap);
console.log(highest);

＆＃13;

Answer 3

像这样：

var highest = {fruit:"", num:0}
for (var fruit in fruitMap) {
  var num = fruitMap[fruit];
  if (num > highest.num) { // if the current number of fruits is greater than the saved
    highest.fruit=fruit; // save the fruit
    highest.num=num;     // save the number
  }
}
console.log(highest);

或者使用对象排序对数组进行排序并弹出最后一个

＆＃13;

var fruitString = 'Banana,Banana,Pear,Orange,Apple,Melon,Grape,Apple,Banana,Grape,Melon,Grape,Melon,Apple,Grape,Banana,Orange,Melon,Orange,Banana,Banana,Orange,Pear,Grape,Orange,Orange,Apple,Apple,Banana'

var fruitList = fruitString.split(',')
var fruitMap = {};

function soldfruits() {
  for (var i = 0; i < fruitList.length; i++) {
    var currentFruit = fruitList[i]
    if (fruitMap[currentFruit] === undefined) {
      fruitMap[currentFruit] = 0;
    }
    fruitMap[currentFruit] = fruitMap[currentFruit] + 1
  }
  console.log(fruitMap);
}


soldfruits(fruitMap);

var highest = {fruit:"", num:0}
for (var fruit in fruitMap) {
  var num = fruitMap[fruit];
  if (num > highest.num) {
    highest.fruit=fruit;
    highest.num=num;
  }
}
console.log(highest);

＆＃13;

Answer 4

此代码将返回销售的水果数量最多以及这些水果的名称。

var mostSold = 0;
var mostFruits = [];
for (var fruits in fruitMap) {
  if (fruitMap[fruits] > mostSold) {
    // store the number of fruit sold
    mostSold = fruitMap[fruits];
    // initialise the list with the fruit name
    mostFruits = [fruits];
  }
  else if (fruitMap[fruits] == mostSold) {
    // add the fruit name to the list
    mostFruits.push(fruits);
  }
}
console.log( mostSold + ' : ' + mostFruits );

麻烦通过for循环计算出最高值

4 个答案: