How to reposition JSON structure key and value?

Question

I have a json like this:

[
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 1
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 0
    }
]

I want to reposition the structure of json in case hasil = 1 into last position, and keep the seq value,

I've reasearch before asking here, unfortunately I don't know the right keyword of this issue.

purpose:

[
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 1
    }
]

there's a way to make it possible?

This question seemingly has nothing to do with JSON at all... — Brad
– Brad, Commented Jan 16, 2018 at 7:12
Try to check this one : stackoverflow.com/questions/17684921/… — Willas
– Willas, Commented Jan 16, 2018 at 7:13

Justinas · Accepted Answer · 2018-01-16 07:14:00Z

1

Simply sort your array with user function

var array = [
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 1
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 0
    }
];

array.sort(function (a, b) {
  return a.hasil - b.hasil;
});

for (var i = 0; i < array.length; i++) {
  array[i].seq = i+1;
}

console.log(array);

edited Jan 16, 2018 at 7:14

answered Jan 16, 2018 at 7:10

Justinas

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5 Comments

gurvinder372 Over a year ago

OP is looking to retain the seq value at the same index.

flix Over a year ago

the problem is about seq, i need to keep seq in the same position as first json,

Justinas Over a year ago

@flix Check update. After sort re-iterate your array and re-assign seq

gurvinder372 Over a year ago

@flix Can you verify if your original seq value will always be in order and not loose any value (like 1,2,4,5,7) in between?

flix Over a year ago

@gurvinder372 for real, i have 6 index of json, and this seq is like a ranking, though the answer is right, ill try it first

Hassan Imam · Accepted Answer · 2018-01-16 07:15:22Z

You can create an array of hasil values and sort it and using array#map and object#assign create your new array.

var input = [{ "tipe": "foo1", "color": "red", "size": 92, "seq": 1, "hasil": 0 }, { "tipe": "foo2", "color": "red", "size": 92, "seq": 2, "hasil": 1 }, { "tipe": "foo3", "color": "red", "size": 92, "seq": 3, "hasil": 0 }],
    sortedHasil = input.map(({hasil}) => hasil).sort(),
    result = input.map((o, i) => Object.assign(o, {'hasil': sortedHasil[i]}));
console.log(result);

Faly · Accepted Answer · 2018-01-16 07:30:18Z

1

Sort your array by hasil then loop through it to reassign seq:

var arr = [
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 1
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 0
    }
];
   
var seqs = arr.map(e => e.seq);
arr.sort((a, b) => a.hasil - b.hasil).forEach((e, i) => e.seq = seqs[i]);
console.log(arr);

edited Jan 16, 2018 at 7:30

answered Jan 16, 2018 at 7:11

Faly

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1 Comment

gurvinder372 Over a year ago

OP is looking to retain the seq value at the same index

Nozar Safari · Accepted Answer · 2018-01-16 07:11:22Z

try sort function if u dont want to sort u can do it with if else

var input =[
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 1
    }
]

input.sort(function (a,b){

    return a.hasil - b.hasil


})

Aswin Ramesh · Accepted Answer · 2018-01-16 07:20:43Z

you can have a sort and then a map function to handle this, like

var json = [
    {
        "tipe": "foo1",
        "color": "red",
        "size": 92,
        "seq": 1,
        "hasil": 0
    },
    {
        "tipe": "foo2",
        "color": "red",
        "size": 92,
        "seq": 2,
        "hasil": 1
    },
    {
        "tipe": "foo3",
        "color": "red",
        "size": 92,
        "seq": 3,
        "hasil": 0
    }
]


var newArr = json.sort(function(a, b){
  if(a.hasil === b.hasil)
      return a.seq  - b.seq;

  return a.hasil - b.hasil
}).map(function(a, i) {
  return {
    ...a,
    seq: i+1
  }
})

console.log(newArr)

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