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How to create and use multidimensional array in Angular 6?


By : Hendrik
Date : October 15 2020, 08:10 PM
hope this fix your issue I'm from PHP backgroun, and started using Angular recently. I'm using Angular 6 and need help on creating multidimensional array. I tried many ways but not working, so please help. , You can use the js Object type for the purpose.
Example:
code :
    let myobj:Object = {
      "employees":[
         {"firstName":"John", "lastName":"Doe"}, 
         {"firstName":"Anna", "lastName":"Smith"},
         {"firstName":"Peter", "lastName":"Jones"}
      ]
   };


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Find duplicate values in a multidimensional array and create new multidimensional array that contains no dupes


By : Everaert
Date : March 29 2020, 07:55 AM
help you fix your problem For this solution let's say the array taken from the databse is named $facilities. The code would be:
code :
$noDupes = array();

foreach ($facilities as $fac) {
    $facilityIndex = -1; // The index of the facility name, -1 indicates it wasn't found.
    $dateIndex = '';     // The index of the date string, an empty string indicates it wasn't found.
    $timeslotIndex = ''; // The index of the timeslot, an empty string indicates it wasn't found.
    $facDate = "{$fac['day']} {$fac['month']} {$fac['year']}"; // The date string (dd mmm aaaa)

    foreach ($noDupes as $f => $facility) {
         if ($fac['facility_name'] == $facility['facility_name']) {
            // If the facility name was found we take the corresponding index (0, 1, 2, etc.).
            $facilityIndex = $f;

            foreach ($facility['dates'] as $d => $date) {
                if ($facDate == $date['date']) {
                    // If the date string was found we take the corresponding index (date1, date2, date3, etc.).
                    $dateIndex = $d;

                    foreach ($date['timeslots'] as $t => $timeslot) {
                        if ($fac['start_time'] == $timeslot['start_time'] && $fac['end_time'] == $timeslot['end_time']) {
                            // If the timeslot was found we take the corresponding index (timeslot1, timeslot2, timeslot3, etc.).
                            $timeslotIndex = $t;
                            break; // end timeslot loop
                        }
                    }

                    break; // end date loop
                }
            }

            break; // end facility loop
        }
    }

    if ($facilityIndex == -1) {
        // Take the new index for the date and timeslot if-statements
        $facilityIndex = count($noDupes);

        $noDupes[] = array(
            'facility_name' => $fac['facility_name'],
            'dates' => array()
        );
    }

    if ($dateIndex == '') {
        // Calculate the new index for the date (date1, date2, etc.)
        $dateNum = count($noDupes[$facilityIndex]['dates']) + 1;
        $dateIndex = "date{$dateNum}";

        $noDupes[$facilityIndex]['dates'][$dateIndex] = array(
            'date' => $facDate,
            'timeslots' => array()
        );
    }

    if ($timeslotIndex == '') {
        // Calculate the new index for the timeslot (timeslot1, timeslot2, etc.)
        $timeslotNum = count($noDupes[$facilityIndex]['dates'][$dateIndex]['timeslots']) + 1;
        $timeslotIndex = "timeslot{$timeslotNum}";

        $noDupes[$facilityIndex]['dates'][$dateIndex]['timeslots'][$timeslotIndex] = array(
            'start_time' => $fac['start_time'],
            'end_time' => $fac['end_time']
        );
    }
}

How to create check box from multidimensional array using angular js


By : BetaWorldLine
Date : March 29 2020, 07:55 AM
To fix the issue you can do you did not provided enough code but as far as i understand, you can do something like that:
code :
   <div ng-repeat="level1 in attendance">
      <div ng-repeat="level2 in level1.dietry_reqs">
         <input type="checkbox" value="{{level2.value}}">{{level2.name}}
      </div>
   </div>

create multidimensional array then push another array each those multidimensional array


By : user2228530
Date : March 29 2020, 07:55 AM
wish of those help You could group the data by finding the array with the value or create a new array for the result set.
code :
var array = ["apple", "orange", "avocados", "tomato", "tangerine"],
    result = array.reduce((r, s) => {
        var temp = r.find(([c]) => c === s[0]);
        if (temp) {
            temp[1].push(s);
        } else {
            r.push([s[0], [s]]);
        }
        return r;
    }, []);
    
console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
var array = ["apple", "orange", "avocados", "tomato", "tangerine"],
    result = Array.from(
        array.reduce((map, s) => map.set(s[0], [...(map.get(s[0]) || []), s]), new Map)
    );
    
console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }

How do I dynamically create html table with angular from a multidimensional array?


By : user2822525
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , A few things which i did:
the name of the array is dArray were 'd-1', 'd-2', 'd-3'... which had an operator as part of the name; i renamed these to d1, d2 & d3 you wanted to display only one value in column 'D-1', so we do an *ngIf='i==0' to ensure that we evaluate the first row of the dArray for this table column 'D-1' we had to use a nested if and else so that only one valid value is printed, else we get a N/A
code :
<table>
    <thead>
        <tr>
            <th>A</th>
            <th>B</th>
            <th>C</th>
            <th>D-1</th>
            <th>D-2</th>
            <th>D-3</th>
        </tr>
    </thead>
    <tbody>
        <tr *ngFor="let l of myArray">
            <td>{{l.a}}</td>
            <td>{{l.b}}</td>
            <td>{{l.c}}</td>
            <ng-container *ngFor="let m of l.dArray; let i=index">
                <td *ngIf='i===0'>
                    <div *ngIf="m.d1 === 1; else my1Else1">
                        {{ m.d3 }}%
                    </div>
                    <ng-template #my1Else1>
                        <div *ngIf="m.d1 === 2; else my2Else2">
                            {{ m.d3 }}%
                        </div>
                        <ng-template #my2Else2>
                            <div *ngIf="m.d1 === 3; else my3Else3">
                                {{ m.d3 }}%
                            </div>
                            <ng-template #my3Else3>
                                N/A
                            </ng-template>
                        </ng-template>
                    </ng-template>
                </td>

                <td *ngIf='i===1'>
                    <div *ngIf="m.d1 === 1; else my1Else1">
                        {{ m.d3 }}%
                    </div>
                    <ng-template #my1Else1>
                        <div *ngIf="m.d1 === 2; else my2Else2">
                            {{ m.d3 }}%
                        </div>
                        <ng-template #my2Else2>
                            <div *ngIf="m.d1 === 3; else my3Else3">
                                {{ m.d3 }}%
                            </div>
                            <ng-template #my3Else3>
                                N/A
                            </ng-template>
                        </ng-template>
                    </ng-template>
                </td>

                <td *ngIf='i===2'>
                    <div *ngIf="m.d1 === 1; else my1Else1">
                        {{ m.d3 }}%
                    </div>
                    <ng-template #my1Else1>
                        <div *ngIf="m.d1 === 2; else my2Else2">
                            {{ m.d3 }}%
                        </div>
                        <ng-template #my2Else2>
                            <div *ngIf="m.d1 === 3; else my3Else3">
                                {{ m.d3 }}%
                            </div>
                            <ng-template #my3Else3>
                                N/A
                            </ng-template>
                        </ng-template>
                    </ng-template>
                </td>

            </ng-container>
        </tr>
    </tbody>
</table>

javascript - create multidimensional array from another multidimensional array


By : user3420603
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You could use a simple reduce() operation that keeps track of the current value you're basing your grouping on:
code :
const codes = [
  ['2', '12521'],
  ['3', '32344'],
  ['3', '35213'],
  ['4', '42312'],
  ['4', '41122'],
  ['5', '51111', '']
];

const output = codes.reduce(({result, current}, [x, ...y]) => {
  if (current !== x) result.push([]);
  result[result.length - 1].push([x, ...y]);
  
  return {result, current: x};
}, {result: []}).result;

console.log(output);
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