更新嵌套对象

  let data = [
     {title: 'food', category: 'food', value: 10},
     {title: 'good', category: 'hood', value: 40},
     {title: 'sood', category: 'lending', value: 20},
  ];

/**
* By this function you can update any array of objects and return the * updated array.
*
* @param    array    data         The data array to update.
* @param    string   findKey      The key to select the object to update.
* @param    string   findValue    The value which has to match for object selection.
* @param    string   replaceKey   Which key to update.
* @param    string   replaceValue replaceKey updated by which value.
*
* @return   array    The updated array.
*/
function update(data, findKey, findValue, replaceKey, replaceValue) {
  return data.map(value => {
    
    if (value[findKey] === findValue) {
      value[replaceKey] = replaceValue;
    }
    
    return value;
  });
}

// Here I update the data array by finding the object which has the 'title' value is 'food' and replace the 'value' field by 50
const updatedData = update(data, 'title', 'food', 'value', 50);

console.log(updatedData);