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Manipulating object arrays for unique data


By : niteen chougule
Date : October 18 2020, 03:08 PM
should help you out If arr1 = arr2 would be a solution, except that you want to mutate arr1 instead of replacing it, then consider using splice:
code :
var arr1=[{id:0,quantity:1},{id:2,quantity:12},{id:3,quantity:9}],
    arr2=[{id:1,quantity:10},{id:2,quantity:20}];

arr1.splice(0, arr1.length, ...arr2);

console.log(arr1);
var arr1=[{id:0,quantity:1},{id:2,quantity:12},{id:3,quantity:9}],
    arr2=[{id:1,quantity:10},{id:2,quantity:20}];
// key both arrays by id in Maps
var mp1 = new Map(arr1.map(obj => [obj.id, obj])),
    mp2 = new Map(arr2.map(obj => [obj.id, obj]));
// traverse arr1 from right to left so deletions will not affect the loop
arr1.reduceRight( (_, obj, i) => {
    if (mp2.has(obj.id)) {
        Object.assign(obj, mp2.get(obj.id)); // update
    } else {
        arr1.splice(i, 1); // delete
    }
}, null);
arr2.forEach( (obj) => {
    if (!mp1.has(obj.id)) {
        arr1.push(obj); // insert
        // If you need the inserted object to be a copy, then do:
        // arr1.push(Object.assign({}, obj));
    }
});

// If you need the result to be sorted by `id`, then do this also:
arr1.sort( (a,b) => a.id - b.id );

console.log(arr1);


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manipulating retrieved data using arrays


By : Muhanad Saabneh
Date : March 29 2020, 07:55 AM
This might help you mysql_fetch_assoc is your friend:
code :
// Better turn on error_reporting
error_reporting(E_ALL); 
ini_set("display_errors", 1); 

// sp@20120227 - added the ')' at the end of the condition in the where part
$cursor = mysql_query( 'SELECT name,items '
                     . '  FROM mutable '
                     . ' WHERE ( user_id = "' . mysql_real_escape_string( $id ) . '" ) ' 
                     );

$foundItems = array();

// likely to be a parameter of a function...
$totalUnitsOrdered = 25;

// maps user to amount assigned from him
$assignedQuantityPerUser = array();


while ( $row = mysql_fetch_assoc( $cursor ) ) {

  // Still order Quantity left?
  if ( 0 < $totalUnitsOrdered ) {

    if ( $row[ "items" ] <= $totalUnitsOrdered ) {

       // assign all of $row[ "items" ]
       $totalUnitsOrdered                         -= 0 + $row[ "items" ];
       $assignedQuantityPerUser[ $row[ "name" ] ] += 0 + $row[ "items" ];

    }  else {

       // assign all the rest: $totalUnitsOrdered
       $totalUnitsOrdered                          = 0;
       $assignedQuantityPerUser[ $row[ "name" ] ] += $totalUnitsOrdered;

    }

  }


   $newItem[] = $row[ "name" ];
   $newItem[] = $row[ "items" ];

   // Append $newItem to the end of $foundItems 
   $foundItems[] = $newItem;

} // while

Difficulty with passing arrays and manipulating data in arrays (Homework) c#


By : Maxville Llp
Date : March 29 2020, 07:55 AM
hope this fix your issue Since this is homework, I won't give you the full answer, but here is a way forward.
Instead of using the ref keyword, just pass the array into the method. Have the method return an int instead of void. Calculate the average within the method and have the final line of the method return the int that you've calculated
code :
static int CalculateAverageScore(int[] playerScores)
{
    // calculate average

    return average; // the int you've calculated.
}

Manipulating workbook data with two arrays


By : Jagan M
Date : March 29 2020, 07:55 AM
it helps some times Your problem is that when you test the LBOUND of an unallocated array, you will get an error. And that will be the case on the first pass through your IsInArray function.
Since links to outside websites are discouraged, I have copied the IsArrayEmpty function from Chip Pearson's web site page on VBA Arrays
code :
Function IsInArray(stringToBeFound As String, Arr As Variant) As Long
Dim position As Long
'default return value if value not found in array

IsInArray = -1
If IsArrayEmpty(Arr) Then Exit Function


For position = LBound(Arr) To UBound(Arr) 'subscript out of range
    If Arr(position) = stringToBeFound Then
        IsInArray = position + 1
        Exit For
    End If
Next

End Function

Public Function IsArrayEmpty(Arr As Variant) As Boolean
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'From Chip Pearson [VBA Arrays](http://www.cpearson.com/excel/vbaarrays.htm)

' IsArrayEmpty
' This function tests whether the array is empty (unallocated). Returns TRUE or FALSE.
'
' The VBA IsArray function indicates whether a variable is an array, but it does not
' distinguish between allocated and unallocated arrays. It will return TRUE for both
' allocated and unallocated arrays. This function tests whether the array has actually
' been allocated.
'
' This function is really the reverse of IsArrayAllocated.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

Dim LB As Long
Dim UB As Long

Err.Clear
On Error Resume Next
If IsArray(Arr) = False Then
' we weren't passed an array, return True
    IsArrayEmpty = True
End If

' Attempt to get the UBound of the array. If the array is
' unallocated, an error will occur.
UB = UBound(Arr, 1)
If (Err.Number <> 0) Then
    IsArrayEmpty = True
Else
''''''''''''''''''''''''''''''''''''''''''
 ' On rare occassion, under circumstances I
 ' cannot reliably replictate, Err.Number
 ' will be 0 for an unallocated, empty array.
 ' On these occassions, LBound is 0 and
 ' UBoung is -1.
 ' To accomodate the weird behavior, test to
 ' see if LB > UB. If so, the array is not
 ' allocated.
 ''''''''''''''''''''''''''''''''''''''''''
 Err.Clear
 LB = LBound(Arr)
 If LB > UB Then
 IsArrayEmpty = True
 Else
 IsArrayEmpty = False
 End If
End If

End Function

Manipulating PHP Object Arrays


By : Luis Larrinaga
Date : March 29 2020, 07:55 AM
wish of those help I have a PHP object retrieved from MySQL, which is an array of objects, as below. , To replace an object...

Manipulating data in nested arrays in Redux with immutable.js


By : KMT
Date : March 29 2020, 07:55 AM
it should still fix some issue When things the data to become a bit too deep, you can still use helper like Immutable.js Map. I am not sure this is the correct way to use Immutable.js since I am also experimenting it. It lets you return new state in a less verbose way like this :
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