Javascript delete JSON elements

Question

I have this JSON string in a PHP page:

{
  "elements": [{
    "type": "pie",
    "alpha": 0.3,
    "animate": [{
      "type": "fade"
    }, {
      "type": "bounce",
      "distance": 5
    }],
    "start-angle": 0,
    "tip": "#val# de #total# #percent#",
    "colours": ["#d01f3c", "#356aa0", "#C79810"],
    "values": [{
      "value": 1,
      "label": "procesador amd sempron 140"
    }, {
      "value": 1,
      "label": "procesador sempron le130"
    }, {
      "value": 1,
      "label": "procesador amd a4-3300 x2"
    }, {
      "value": 1,
      "label": "procesador intel celeron g530"
    }]
  }],
  "title": {
    "text": "Procesadores, Reinicio",
    "style": "color: #356aa0; font-size: 20px"
  },
  "bg_colour": "#FFFFFF",
  "x_axis": null
}

I call it like this:

$.getJSON("restart_proce.php", function(json)
{    
console.log(json);

I need to transform it to this:

[{\"value\": 1, \"label\": \"procesador amd sempron 140\" }, { \"value\": 1, \"label\": \"procesador sempron le130\" }, { \"value\": 1, \"label\": \"procesador amd a4-3300 x2\" }, { \"value\": 1, \"label\": \"procesador intel celeron g530\" } ]

I'm trying to delete elements like this:

delete json.elements[3];

but it doesn't delete anything. How can I make it work?

delete will set that array element to undefined, but it will not remove the element. Use splice instead. Ofcourse, in this example there is only 1 element in that elements array, so json.elements[3] is accessing nothing. — Chad
– Chad, Commented Dec 26, 2012 at 18:10
There only seems to be one element in the array contained in the elements property. — user1726343
– user1726343, Commented Dec 26, 2012 at 18:14

Chad · Accepted Answer · 2012-12-26 18:11:29Z

2

Removing an item from an Array:

There are several ways. The splice method is the most versatile:

data.items.splice(3, 1); // Removes three items starting with the 2nd,

splice modifies the original array, and returns an array of the items you removed.

edited Dec 26, 2012 at 18:11

Chad

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answered Dec 26, 2012 at 18:07

laxonline

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Comments

Chad · Accepted Answer · 2012-12-26 18:12:02Z

2

Try this:

json.elements.splice(3, 1);

See: Array.splice

edited Dec 26, 2012 at 18:12

Chad

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answered Dec 26, 2012 at 18:05

karaxuna

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Comments

Shiplu Mokaddim · Accepted Answer · 2012-12-26 18:11:11Z

1

Just modify the values directly before console.log(json)

json= json.elements[0].values

Or in the restart_proce.php php page just echo

echo json_encode($data['elements'][0]['values']); // if associative array is used.

answered Dec 26, 2012 at 18:11

Shiplu Mokaddim

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Comments

Zaheer Ahmed · Accepted Answer · 2012-12-26 18:20:04Z

0

Try this:

var data = {"result":[
  {"FirstName":"Test1","LastName":"User","Email":"[email protected]","City":"ahmedabad","State":"sk","Country":"canada","Status":"False","iUserID":"23"},
  {"FirstName":"user","LastName":"user","Email":"[email protected]","City":"ahmedabad","State":"Gujarat","Country":"India","Status":"True","iUserID":"41"},
  {"FirstName":"Ropbert","LastName":"Jones","Email":"[email protected]","City":"NewYork","State":"gfg","Country":"fgdfgdfg","Status":"True","iUserID":"48"},
  {"FirstName":"hitesh","LastName":"prajapti","Email":"[email protected]","City":"","State":"","Country":"","Status":"True","iUserID":"78"}
  ]
}
alert(data.result);
delete data.result[3];
alert(data.result);

working JSFiddle

or You can use splice to remove elements from an array.

edited Dec 26, 2012 at 18:20

answered Dec 26, 2012 at 18:12

Zaheer Ahmed

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1 Comment

m90 Over a year ago

Won't work as it sets the element to undefined. There are "freak" situations in which this works though, so it shouldn't be trusted.

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