Restructure the Array of objects

Question

I have an array of objects which I need to restructure. The input array of objects is as follows:

[
 [
  {
    "lat": 51.00445965809624,
    "lng": 5.505536355741434
  },
  {
    "lat": 51.00431971638806,
    "lng": 5.505461423372382
  },
  {
    "lat": 51.00417977463196,
    "lng": 5.505386491455417
  },
  {
    "lat": 51.00403983282792,
    "lng": 5.505311559990534
  },
  {
    "lat": 51.00389989097598,
    "lng": 5.505236628977724
  },
  {
    "lat": 51.00375994907609,
    "lng": 5.505161698416986
  },
  {
    "lat": 51.00362000712828,
    "lng": 5.505086768308312
  }
],
[
  {
    "lat": 51.00440846173839,
    "lng": 5.505785160705168
  },
  {
    "lat": 51.00426821144456,
    "lng": 5.505709911534925
  },
  {
    "lat": 51.00412796110243,
    "lng": 5.50563466281968
  },
  {
    "lat": 51.00398771071194,
    "lng": 5.5055594145594275
  },
  {
    "lat": 51.00384746027312,
    "lng": 5.505484166754162
  },
  {
    "lat": 51.00370720978598,
    "lng": 5.5054089194038776
  },
  {
    "lat": 51.0035669592505,
    "lng": 5.50533367250857
  }
],
[
  {
    "lat": 51.004357264852146,
    "lng": 5.506033965119733
  },
  {
    "lat": 51.00421670597403,
    "lng": 5.505958399145694
  },
  {
    "lat": 51.004076147047186,
    "lng": 5.505882833629572
  }, 
  {
    "lat": 51.003935588071585,
    "lng": 5.505807268571363
  },
  {
    "lat": 51.00379502904726,
    "lng": 5.505731703971063
  },
  {
    "lat": 51.003654469974194,
    "lng": 5.5056561398286625
  },
  {
    "lat": 51.00351391085237,
    "lng": 5.505580576144162
  }
],
[
  {
    "lat": 51.00430606743754,
    "lng": 5.506282768985127
  },
  {
    "lat": 51.00416519997647,
    "lng": 5.506206886204688
  },
  {
    "lat": 51.00402433246626,
    "lng": 5.506131003885096
  },
  {
    "lat": 51.00388346490688,
    "lng": 5.506055122026344
  },
  {
    "lat": 51.00374259729837,
    "lng": 5.505979240628427
  },
  {
    "lat": 51.00360172964068,
    "lng": 5.505903359691342
  },
  {
    "lat": 51.003460861933874,
    "lng": 5.505827479215082
  }
]
]

In actuality these are the coordinates of pitch blocks here as below:

If you see there are four row lines ( each block has two up and down ) and seven column lines ( each block has two, left and right line). so array has four main array and seven objects under that.

Can I get the structure of array so that it should be like the coordinates of each block in array? e.g.

[
  [


[
   { lat: 51.00445965809624, lng: 5.505536355741434 },
   { lat: 51.00431971638806, lng: 5.505461423372382 },
   { lat: 51.00426821144456, lng: 5.505709911534925 },
   { lat: 51.00440846173839, lng: 5.505785160705168 },
   { lat: 51.00445965809624, lng: 5.505536355741434 }
  ],[
    ....
  ]
] ,[
    ....
  ]
]

Below array structure, if for bottom left block number 54.

[
    [


 [
   { lat: 51.00445965809624, lng: 5.505536355741434 },
   { lat: 51.00431971638806, lng: 5.505461423372382 },
   { lat: 51.00426821144456, lng: 5.505709911534925 },
   { lat: 51.00440846173839, lng: 5.505785160705168 },
   { lat: 51.00445965809624, lng: 5.505536355741434 }
  ],[
    ....
  ]
] ,[
        {},{}..
    ]
]

trincot · Accepted Answer · 2022-10-21 13:22:50Z

1

You'll have to iterate the original array and make the "box" combinations. There are many ways to do that. Here is how you can use flatMap and map to perform the nested iteration along row/column dimensions:

const points = [[{"lat": 51.00445965809624,"lng": 5.505536355741434},{"lat": 51.00431971638806,"lng": 5.505461423372382},{"lat": 51.00417977463196,"lng": 5.505386491455417},{"lat": 51.00403983282792,"lng": 5.505311559990534},{"lat": 51.00389989097598,"lng": 5.505236628977724},{"lat": 51.00375994907609,"lng": 5.505161698416986},{"lat": 51.00362000712828,"lng": 5.505086768308312}],[{"lat": 51.00440846173839,"lng": 5.505785160705168},{"lat": 51.00426821144456,"lng": 5.505709911534925},{"lat": 51.00412796110243,"lng": 5.50563466281968},{"lat": 51.00398771071194,"lng": 5.5055594145594275},{"lat": 51.00384746027312,"lng": 5.505484166754162},{"lat": 51.00370720978598,"lng": 5.5054089194038776},{"lat": 51.0035669592505,"lng": 5.50533367250857}],[{"lat": 51.004357264852146,"lng": 5.506033965119733},{"lat": 51.00421670597403,"lng": 5.505958399145694},{"lat": 51.004076147047186,"lng": 5.505882833629572}, {"lat": 51.003935588071585,"lng": 5.505807268571363},{"lat": 51.00379502904726,"lng": 5.505731703971063},{"lat": 51.003654469974194,"lng": 5.5056561398286625},{"lat": 51.00351391085237,"lng": 5.505580576144162}],[{"lat": 51.00430606743754,"lng": 5.506282768985127},{"lat": 51.00416519997647,"lng": 5.506206886204688},{"lat": 51.00402433246626,"lng": 5.506131003885096},{"lat": 51.00388346490688,"lng": 5.506055122026344},{"lat": 51.00374259729837,"lng": 5.505979240628427},{"lat": 51.00360172964068,"lng": 5.505903359691342},{"lat": 51.003460861933874,"lng": 5.505827479215082}]];

const boxes = points.slice(1).flatMap((row, y) => 
    row.slice(1).map((_, x) => [
        ...points[y].slice(x, x + 2),
        ...row.slice(x, x + 2)
    ])
);

console.log(boxes);

Note that the same object will be used multiple times in the output, as an object represents a point that can be shared by up to four neighboring boxes. In the above stack snippet output, this reuse of the same objects is marked with /*id*/ and /*ref*/ comments.

answered Oct 21, 2022 at 13:22

trincot

357k38 gold badges282 silver badges338 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Deep Kakkar Over a year ago

Hello @trincot, there is a change in the question, I have updated the required structure. Can you please look into it? the third element should be on the fourth position. Actually I am looking to make it a square block.

trincot Over a year ago

Sorry, but I don't like to work on a moving target. If I spend more time on this you might decide to change the question again and again. Sorry, but I don't like questions that change after answers have been posted.

Deep Kakkar Over a year ago

should I accept this answer and post a new question ? but this is the final requirement.

Deep Kakkar Over a year ago

I have accepted the answer and will ask a new question

Deep Kakkar Over a year ago

I have added question here on stackoverflow.com/questions/74262967

|

Collectives™ on Stack Overflow

Restructure the Array of objects

1 Answer 1

7 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

7 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related