Javascript JSON未知行为

我试图设置JSON对象属性的值,但是当我运行 Object.property = value 整个JSON对象将替换为字符串 229,

for(var i=0; i<config["profiles"].length; i++){
    profile = config["profiles"][i];
    out = {
      "name":profile["name"],
      "version":profile["version"].replace(/_/g, "."),
      "mods":null,
      "saves":null
    }
    console.log(out)
    out.mods = getMods(profile);
    console.log(out)
    console.log(getSaves(profile))
    out.saves = getSaves(profile);
    console.log(out)
    profiles.push(out);
}
return profiles;

前2名 console.log(out) 调用按预期返回正确的JSON对象。

console.log(getSaves(profile)) 打印以下内容:

[ { name: 'Hard Career ',
    mode: 'CAREER',
    funds: '275,520',
    science: '229',
    reputation: '721',
    flights: '20' },
  { name: 'Sandbox ',
    mode: 'SANDBOX',
    funds: 0,
    science: 0,
    reputation: 0,
    flights: '12' } ]

但是,打印后 out.saves = getSaves(profile) 打印以下内容: 229, .

更复杂的是,这只发生在 config["profiles"] 数组。

提前谢谢!