根据值从JSON对象中删除元素

var jsonData = {
    "2018-1-15 22:35:22": {
        "entry": "1234",
        "ticket": "32432432432523",
        "name": "test"
    },

    "2018-1-15 23:35:22": {
        "entry": "5678",
        "ticket": "2485181851981",
        "name": "test2"
    }

}

function _isContains(json, value) {
    let contains = false;
    Object.keys(json).some(key => {
        contains = typeof json[key] === 'object' ? _isContains(json[key], value) : json[key] === value;
        return contains = key;
    });
    return contains;
}

var entryToDelete = 1234
var contains = _isContains(jsonData, entryToDelete)

if ( contains !== false) {
    delete jsonData[contains]
    console.log(jsonData)
}

const jsondata = {
    "2018-1-15 22:35:22": {
        "entry": "1234",
        "ticket": "32432432432523",
        "name": "test"
    },

    "2018-1-15 23:35:22": {
        "entry": "5678",
        "ticket": "2485181851981",
        "name": "test2"
    }

}

function getKeyFromValue(json, value) {
    let output = null; // assume we don't find the entry
    Object.keys(json).some(key => {
      // if entry is equal to value, then set output to key
      if ( json[key].entry === value ) output=key;
      // return output. As long as it is null, it will continue to with next entry.
      return output;
    });
    return output; // returns the key
}

var entryToDelete = "1234"
var key = getKeyFromValue(jsondata, entryToDelete);
console.log('key', key);
// if the key is set (no need to test for not null)
if (key) delete jsondata[key];
console.log(jsondata);