What is the data type of the $result.rows.item(x) variable in Javascript?

Question

What is the data type of the $result.rows.item(x) variable in Javascript?

I have a function that reads and displays the contents of a SELECT query from WEBSQL in HTML5. I need to reuse this function, but I am facing an issue because it returns an Array of JSON objects and I want to convert it to rows.item(). Does anyone know how to achieve this?

For example, consider this JSON Array:

"retdic":[{"row_index":0,"lname":"Mato","age":26,"gender":"M","pic":"cyborg.jpg","fname":"Shibiru"},
          {"row_index":1,"lname":"Taro","age":30,"gender":"M","pic":"folder_wrench.png","fname":"Ichigo"},
          {"row_index":2,"lname":"Joni","age":27,"gender":"M","pic":"naruto.jpg","fname":"Perez"},
          {"row_index":3,"lname":"Sakura","age":24,"gender":"F","pic":"folder_table.png","fname":"Haruka"},              
          {"row_index":4,"lname":"Naruto","age":20,"gender":"M","pic":"naruto.jpg","fname":"Uzumaki"}]

Is there a way to convert it to something like $result.rows.item()? Since item() is not an array (as it should be item[] if it were), how can this conversion be done?

UPDATE

With Jeff's assistance and ideas, I was able to find a solution. Check out the live example

javascript json web-sql

Answer 1

Answer №1

Let's start by comparing your array with the item() function. One is an array while the other is a function (assuming you use item() like "$result.rows.item(3)" to retrieve the 4th row). The solution is quite straightforward. Simply create a function that accepts a parameter 'i' and returns the item at index 'i' in the array. Here's how:

var myItemFunction = function(i) {
     return retdic[i]
}

Answer 2

Let's start by comparing your array with the item() function. One is an array while the other is a function (assuming you use item() like "$result.rows.item(3)" to retrieve the 4th row). The solution is quite straightforward. Simply create a function that accepts a parameter 'i' and returns the item at index 'i' in the array. Here's how:

var myItemFunction = function(i) {
     return retdic[i]
}

Answer 3

Answer №2

To access the data in this object, you can use the following method:

$result.retdic[0].lname // 0 - index of the row

Alternatively, you can iterate through the object using a loop:

var i,item;
for (i in $result.retdic) {
  item = $result.retdic[i];
  console.log(item.fname)
}

By the way, if desired, you have the option to change the key 'retdic' to 'rows'

$res = {"rows":[
  {"name": "a"},
  {"name": "b"},
  {"name": "c"}
]};


var someKey = 'name',
valueOfSomeKey = $res.rows[rowNumberHere][someKey];

Answer 4

To access the data in this object, you can use the following method:

$result.retdic[0].lname // 0 - index of the row

Alternatively, you can iterate through the object using a loop:

var i,item;
for (i in $result.retdic) {
  item = $result.retdic[i];
  console.log(item.fname)
}

By the way, if desired, you have the option to change the key 'retdic' to 'rows'

$res = {"rows":[
  {"name": "a"},
  {"name": "b"},
  {"name": "c"}
]};


var someKey = 'name',
valueOfSomeKey = $res.rows[rowNumberHere][someKey];

What is the data type of the $result.rows.item(x) variable in Javascript?

Answer №1

Answer №2

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