javascript - If else key split JSON

Question

我有这个功能:

let input = {
  "Apples": {
    "Apples": 501.82,
    "Apples_pos2": 502.61,
    "Apples_pos3": 502.61,
    "Apples": 502.16,
  }
};

let output = Object.keys(input).reduce((acc, outerKey) => {
  for (let [key, value] of Object.entries(input[outerKey])) {
    acc.push([outerKey, value, key.split('_')[1]]);
  }
  return acc;
}, []);

console.log(output);

我需要帮助编辑它。我想要的是，如果 key 包含“_pos”，则执行 key.split，如果 key 不包含“_pos”，则保持原样。

我想要的输出是

[
 ["Apples", 501.82, "Apples"], 
 ["Apples", 502.61, "pos2"], 
 ["Apples", 502.61, "pos3"], 
 ["Apples", 502.16, "Apples"]
]

Answer 1

您可以使用 || 处理未定义的。

let input = {
  "Apples": {
    "Apples": 501.82,
    "Apples_pos2": 502.61,
    "Apples_pos3": 502.61,
    "Apples": 502.16,
  }
};

let output = Object.keys(input).reduce((acc, outerKey) => {
  for (let [key, value] of Object.entries(input[outerKey])) {
    acc.push([outerKey, value, key.split('_')[1] || key]);
  }
  return acc;
}, []);

console.log(output);