如何在地图中获取第一个数组索引的迭代？

In the following code curveData is a 2 dimensional array. How can I get the iteration of the first array index in a map?

在下面的代码中,curveData是一个二维数组。如何在地图中获取第一个数组索引的迭代?

curveData.map(function(d) { 
    return d.map(function(count, j) { 
        console.log('d:'+d+', j:'+j+', count:'+count);
        return {x:j, y:count, y0:0};
    });
});

In the code above j is the secondary index.

在上面的代码中,j是二级索引。

For example:

curveData[i][j]

I am getting the j iteration but how can I access the i iteration?

我正在进行j迭代但是如何访问i迭代?

1 个解决方案

#1

To get the outer index, you just need to include the index parameter in your top level map:

要获取外部索引,只需在*映射中包含index参数:

curveData.map(function(d, i) { 
    return d.map(function(count, j) { 
        console.log(curveData[i][j]);
        console.log('d:'+d+', j:'+j+', count:'+count);
        return {x:j, y:count, y0:0};
    });
});