javascript - 如何使用 Javascript 从 JSON 获取总计

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我需要获取 JSON 数据中每一列的总计。下面是我的 JSON 数据，我想获取每列的总计。

[
 {"campaign":"MD001","seen":650,"taken":62,"eligible":542,"total":1000,"ind":"E"},
 {"campaign":"MD002","seen":550,"taken":52,"eligible":342,"total":1000,"ind":"E"},
 {"campaign":"MD003","seen":800,"taken":69,"eligible":642,"total":1000,"ind":"W"},
 {"campaign":"MD004","seen":500,"taken":62,"eligible":527,"total":1000,"ind":"E"},
 {"campaign":"MD005","seen":350,"taken":29,"eligible":992,"total":1000,"ind":"w"},
 {"campaign":"MD006","seen":550,"taken":52,"eligible":342,"total":1000,"ind":"W"}
]

上面的意思是“合格”，每个“合格”都有不同的值，所以我需要从上面的数据中获得“合格”的总数。

Answer 1

那么你必须计算一下:

var data = // your json data
var total = 0;
for(var i = 0; i < data.length; i++){
    total += parseInt(data[i].eligible);        
}

这是一个 fiddle http://jsfiddle.net/CVpxR/