How to convert this array to an array of objects?

Question

This is my array:

[
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['F', "_180"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4]
    ['F', "_360"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4],
    ['m', 5]
    ['F', "_480"],
]

This is what I want to achieve:

[{
    profile_180: {
        x: 1,
        y: 2,
        z: 3
    }
}, {
    profile_360: {
        x: 1,
        y: 2,
        z: 3,
        t: 4
    }
}, {
    profile_480: {
        x: 1,
        y: 2,
        z: 3
        t: 4,
        m: 5
    }
}]

How do I get this?

Down vote without a comment is really useless. You have a problem with array questions? :s — scaryguy
– scaryguy, Commented Mar 22, 2016 at 6:13

Amadan · Accepted Answer · 2016-03-22 06:04:13Z

2

data = [
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['F', "_180"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4],
    ['F', "_360"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4],
    ['m', 5],
    ['F', "_480"],
];

var result = {};
var current = {};
data.forEach(function(row) {
  if (row[0] == 'F') {
    result['profile' + row[1]] = current;
    current = {};
  } else {
    current[row[0]] = row[1];
  }
});
console.log(result);

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answered Mar 22, 2016 at 6:04

Amadan

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1 Comment

scaryguy Over a year ago

Err, actually I had updated my question but you were so fast to answer it I guess, you haven't seen the updated version.

Rajaprabhu Aravindasamy · Accepted Answer · 2016-03-22 06:11:36Z

1

You can do it by,

var res = [], tmp = {}, obj = {};
x.forEach(function(itm,i) {
 if(itm[0] !== "F"){
  tmp[itm[0]] = itm[1];
 } else {
   obj["profile_" + itm[1]] = tmp;
   res.push(obj);
   tmp = {}, obj ={};
 }
});

where x is the array that contains the data.

answered Mar 22, 2016 at 6:11

Rajaprabhu Aravindasamy

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2 Comments

scaryguy Over a year ago

This is exactly what I needed. Thank you!

Rajaprabhu Aravindasamy Over a year ago

@scaryguy Glad to help! :)

gurvinder372 · Accepted Answer · 2016-03-22 06:13:32Z

0

try this

var obj = [
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['F', "_180"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4],
    ['F', "_360"],
    ['x', 1],
    ['y', 2],
    ['z', 3],
    ['t', 4],
    ['m', 5],
    ['F', "_480"],
];
var output = [];
var tmpArr = {};
obj.forEach(function(value,index){

   console.log(value);
   if (value[0] != 'F' )
   {
      tmpArr[value[0]] = value[1];
   }
   else
   {
     var profileValue = "Profile_" + value[1];
     var tmpObj = {};
     tmpObj[profileValue] = tmpArr;
      output.push( tmpObj );
      tmpArr = {};
   }
});
document.body.innerHTML += JSON.stringify(output,0,4);

answered Mar 22, 2016 at 6:13

gurvinder372

68.6k11 gold badges78 silver badges98 bronze badges

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