我试图找出分割具有超过800个点的许多键值对的对象的最佳方法(它们是X和Y坐标)
我想将X分成它自己的数组,将Y分成一个单独的数组,这样我就可以单独访问X而单独使用Y.
这是积分的结构和我尝试的内容
var path = {
0: [41, -73],
1: [41, -74],
2: [42, -75],
3: [43, -76]
};
for (var key in path) {
console.log("key " + key + " has value " + path[key]);
}
这将记录
key 0 has value 41,-73
key 1 has value 42,-74
key 2 has value 43,-75
key 3 has value 44,-76
我需要将第一个值存储在自己的数组中,将第二个值存储到另一个数组中。
例如,我想访问所有的X和Y,
var x = [41, 42, 43, 44]
var y = [-73,-74,-75,-76]
JS FIDDLE HERE http://jsfiddle.net/b3j4w9bv/14/
谢谢!
答案 0 :(得分:2)
你可以沿着这些方向做点什么:
var path = {
0: [41, -73],
1: [41, -74],
2: [42, -75],
3: [43, -76]
};
var x_path = [];
var y_path = [];
for(var key in path)
{
//console.log("key " + key + " has value " + path[key]);
//create a split on , for x & y
var split_path = path[key];
//grab the value of the split:
var x = split_path[0];
var y = split_path[1];
//add the coords to their arrays.
x_path.push(x);
y_path.push(y);
//output result:
console.log(x_path);
console.log(y_path);
}
我没有在性能方面对此进行测试..这可能不是最有效的