Javascript 在JSON字符串化数组中查找值

我想在JSON stringify数组中找到一个值

[{"id":"432","temperature":"1","humidity":"1","createat":"0000-00-00 00:00:00"},{"id":"433","temperature":"22.00","humidity":"48","createat":"2015-10-11 19:49:57"},{"id":"434","temperature":"22.40","humidity":"48","createat":"2015-10-11 19:52:02"},{"id":"435","temperature":"22.40","humidity":"48","createat":"2015-10-11 19:55:26"},{"id":"436","temperature":"22.00","humidity":"48","createat":"2015-10-11 19:58:50"},{"id":"437","temperature":"22.00","humidity":"48","createat":"2015-10-11 20:02:14"},{"id":"438","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:23:15"},{"id":"439","temperature":"22.50","humidity":"50","createat":"2015-10-11 21:24:37"},{"id":"440","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:26:17"},{"id":"441","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:26:41"}]

我得到这个值的想法是知道我正在添加的内容是否还没有添加

....

var jsonArray = [{"id":"432","temperature":"1","humidity":"1",.....

var isPresent = false;
$.each(jsonArray, function(i,v){
    if(jsonArray[i].id == newObject.id){
        isPresent = true;
    }
});
if(!isPresent){
    jsonArray.push(newObject);
}

....

编辑：这里有一个

propertyExists

函数：

var propertyExists = function(stringifiedJson, id, property) {
  // parse the stringified JSON into a JavaScript object
  parsedJson = JSON.parse(stringifiedJson);
  // check if the property exists for a given ID
  for(var i = 0; i < parsedJson.length; i += 1) {
    if(parseInt(parsedJson[i].id) === parseInt(id)) {
      return (typeof parsedJson[i][property] !== 'undefined')
    }
  }
  return false;
}

// stringified json
var stringifiedJson = '[{"id":"432","temperature":"1","humidity":"1","createat":"0000-00-00 00:00:00"},{"id":"433","temperature":"22.00","humidity":"48","createat":"2015-10-11 19:49:57"},{"id":"434","temperature":"22.40","humidity":"48","createat":"2015-10-11 19:52:02"},{"id":"435","temperature":"22.40","humidity":"48","createat":"2015-10-11 19:55:26"},{"id":"436","temperature":"22.00","humidity":"48","createat":"2015-10-11 19:58:50"},{"id":"437","temperature":"22.00","humidity":"48","createat":"2015-10-11 20:02:14"},{"id":"438","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:23:15"},{"id":"439","temperature":"22.50","humidity":"50","createat":"2015-10-11 21:24:37"},{"id":"440","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:26:17"},{"id":"441","temperature":"22.50","humidity":"51","createat":"2015-10-11 21:26:41"}]';

console.log(propertyExists(stringifiedJson, 432, 'humidity'));

var propertyExists=function（stringifiedJson，id，property）{
//将字符串化的JSON解析为JavaScript对象
parsedJson=JSON.parse（stringifiedJson）；
//检查给定ID的属性是否存在
对于（变量i=0；i

var jsonText='[{“id”：“432”，“温度”：“1”，“湿度”：“1”，“createat”：“0000-00-00:00:00:00”}，{“id”：“433”，“温度”：“22.00”，“湿度”：“48”，“createat”：“2015-10-11 19:49:57”}，{“id”：“434”，“温度”：“22.40”，“湿度”：“48”，“createat”：“2015-10-11 19:52:02”}，{“id”：“435”，“温度”：“22.40”，“湿度”：“48”，“createat”：2015-10-11 19:55:26，{id:“436”，“温度：”“22.00”，“湿度：”“48”，“湿度：”“51”，“温度：”“22.50”，“湿度：”“51”，“温度：”“22.50”，“湿度：”“50”，“湿度：”“51”，“湿度：”“22.50”，“湿度：”“22.50”，“湿度：”“50”，“湿度：”“22.50”2015-10-11 21:24:37“}，{“id”：“440”，“温度”：“22.50”，“湿度”：“51”，“创建时间”：“2015-10-11 21:26:17”}，{“id”：“441”，“温度”：“22.50”，“湿度”：“51”，“创建时间”：“2015-10-11 21:26:41”}
函数hasPropValue（数组、属性、值）{
返回数组.some（函数（obj）{
返回对象hasOwnProperty（prop）&&obj[prop]==值；
});
}
document.write（hasPropValue（JSON.parse（jsonText），'id'，'432'）；

迭代并检查属性。为什么不干脆

JSON.parse（）

？@Guillermo是否要检查

javascript

中的值，并添加任何试图获取值的代码只有我想在数组@mikeBy'word'中找到一个词，你是说“id、温度、湿度……等等”吗？因为这些都是属性，可以使用

hasOwnProperty（）找到它们

用“word”我指的是温度id或湿度@A的值。OThere没有jQuery标记或请求，还有自ES5以来内置的Array.prototype.forEach。更合适的是。code–只有答案不受欢迎，你应该解释为什么你的答案解决了OP的问题。我只想知道在wh中是否存在一个值这个答案告诉你。写着

//检查属性是否存在的部分

。

hasPropValue(JSON.parse(jsonText), 'id', '432');