二维数组的总和 [英] Sum of two dimensional array

问题描述

数组[时间，价值]; 我需要来自这个二维数组的总值/总和值？

the array[time, value]; I need to total/sum of value from this two dimensional array?

var array =[ 
    [1361824790262, 90.48603343963623],
    [1361828390262, 500.18687307834625],
    [1361831990262, 296.05108177661896], 
    [1361835590262, 423.1198309659958], 
    [1361839190262, 11.86623752117157], 
    [1361842790262, 296.38282561302185], 
    [1361846390262, 424.31847417354584], 
    [1361849990262, 100.07041704654694], 
    [1361853590262, 434.8605388402939],
    [1361857190262, 434.8220944404602],
    [1361860790262, 183.61854946613312]
];
var sum = 0;
//console.log(array.length);
for (var i = 0; i < array.length; i++) {
    //console.log(array[i]);
    for (var j = 0; j < array[i].length; j++) {
        console.log(array[j][i]);
        sum += array[j][i];
    }
}
console.log(sum);

JsFiddle的链接

推荐答案

你的问题标题意味着你要总结一个二维数组 - 这就是你的意思这样做：

Your question title implies you want to sum a two dimensional array—here's how you would do that:

array.reduce(function(a,b) { return a.concat(b) }) // flatten array
     .reduce(function(a,b) { return a + b });      // sum

只需在编辑中清楚显示值部分即可更加简单：

To sum only the value portions as you made clear in your edit is even easier:

array.map(function(v) { return v[1] })         // second value of each
     .reduce(function(a,b) { return a + b });  // sum

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