how to set array multidimential in javascript-CodePudding

hi can you help me for looping and add array multidimential, because in php it's like easy for create array multi dimention but in javascript i don't know how to make array multidimential but i try like this but error and i don't have any idea

  data_array.forEach((element,i) => {
         
            data1[element.produsen_id][element.category_id] = element.data_value
        })

i try explain for the excel data

this json format what i need

{"main_report": {
"value": {
  "2": {
    "5": "0",
    "7": "0",
    "3": "13",
    "1": "3",
    "10": "0",
    "9": "4",
    "2": "3",
    "8": "0"
  },
  "3": {
    "2": "3",
    "10": "0",
    "1": "2",
    "5": "0",
    "3": "0",
    "9": "0",
    "8": "7"
  },
  "4": {
    "3": "2",
    "10": "0",
    "1": "2",
    "8": "3",
    "2": "2",
    "5": "0",
    "9": "4",
    "7": "1"
  },
  "5": {
    "5": "0",
    "10": "0"
  },
  "7": {
    "3": "0"
  },
  "8": {
    "1": "4",
    "7": "0",
    "8": "0"
  },
  "9": {
    "9": "0",
    "1": "0",
    "3": "0",
    "7": "1",
    "5": "0"
  },
  "10": {
    "3": "0"
  },
  "11": {
    "7": "0",
    "2": "1",
    "3": "11",
    "9": "3",
    "8": "0",
    "1": "1"
  },
  "13": {
    "5": "0",
    "2": "0",
    "8": "0",
    "10": "5",
    "3": "1",
    "1": "0",
    "9": "0"
  },
  "15": {
    "10": "0"
  },
  "16": {
    "10": "0"
  },
  "17": {
    "10": "0"
  },
  "18": {
    "10": "0"
  },
  "19": {
    "10": "0"
  },
  "1": {
    "2": "4",
    "9": "9",
    "3": "8",
    "7": "5",
    "1": "6",
    "4": "2",
    "5": "2"
  },
  "6": {
    "7": "0",
    "3": "3",
    "2": "1",
    "9": "1",
    "1": "1"
  },
  "20": {
    "1": "4",
    "2": "3",
    "9": "5",
    "3": "13",
    "4": "0",
    "7": "1",
    "10": "0"
  }
}

} }

in php looping like this

foreach($result as $key=>$value){
        $return_arr[$value->id_1][$value->id2] = $value->value_data;
    }

how to implement in javascript, i will appriciate for your answer thankyou

CodePudding user response：

Solutions:

We are gonna use objects instead of arrays.

Initialize data1 with empty object data1 = {} and now:

Solution 1:

data_array.forEach((element) => {
  // if data1[element.produsen_id] doesn't exist yet
  if(!data1[element.produsen_id]) {
    data1[element.produsen_id] = {}
  }
  data1[element.produsen_id][element.category_id] = element.data_value
})

Solution 2 (alternatively):

data_array.forEach((element,i) => { 
  data1[element.produsen_id] = {
    ...(data1[element.produsen_id] || {}),
    [element.category_id]: element.data_value
  } 
})

CodePudding user response：

These are nested objects you have not multidimensional arrays {} are for objects and [] are for arrays

CodePudding user response：

What kind of error do you get? Maybe this is the solution

data_array.forEach((element) => {
  // if data1[element.produsen_id] doesn't exist yet
  if(!data1[element.produsen_id]) {
    data1[element.produsen_id] = []
  }
  data1[element.produsen_id][element.category_id] = element.data_value
})