如何循环一个简单的对象？
这个问题在这里已经有了答案：
它看起来像你试图获得一个对象的长度，你不能这样做。 以下应该给你你想要的。
var links = {
"0": {
"fromOperator": "operator2",
"fromConnector": "output_0",
"fromSubConnector": 0,
"toOperator": "operator1",
"toConnector": "input_0",
"toSubConnector": 0
},
"1": {
"fromOperator": "operator2",
"fromConnector": "output_0",
"fromSubConnector": 0,
"toOperator": "operator0",
"toConnector": "input_0",
"toSubConnector": 0
}
}
for(var i = 0; i < Object.keys(links).length; i++) {
var fromConnector = links[i].fromConnector;
var toConnector = links[i].toConnector;
console.log("FROM: " + fromConnector + " ..... TO: " + toConnector);
}
请注意，我将for循环中的限制更新为Object.keys(links).length 。
用一个带有键的对象，从frm零开始并继续键，你可以创建一个数组ald迭代它。
var links = { 0: { fromOperator: "operator2", fromConnector: "output_0", fromSubConnector: 0, toOperator: "operator1", toConnector: "input_0", toSubConnector: 0 }, 1: { fromOperator: "operator2", fromConnector: "output_0", fromSubConnector: 0, toOperator: "operator0", toConnector: "input_0", toSubConnector: 0 } };
Object
.assign([], links)
.forEach(({ fromConnector , toConnector }) =>
console.log("FROM: " + fromConnector + " ..... TO: " + toConnector));