Remove duplicate elements off a multidimension array
By : Ram Manohar Rudravaj
Date : March 29 2020, 07:55 AM
To fix this issue Like Gordon said, you'd need a custom function to make the relationship but you can use http://php.net/manual/en/function.arrayunique.php ? Wouldn't it be better to have the keys of the age array the corresponding values of the id array?

RoR Array Formatting, remove a collect from double dimension array hash,i.e. POP out a particular array from an array us
By : Khorshed Alom
Date : March 29 2020, 07:55 AM

c++ How to remove any empty elements in a two dimension vector
By : daniela_b
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I'm trying to remove any empty vectors inside another vector, below is my code: , You need to increment the index only if you didn't remove an element. code :
for (int i = 0; i < vector.size(); ) {
if (vector[i].size() == 0) {
vector.erase(vector.begin() + i);
} else ++i;
}

Fast way to check if elements in subdimension of a numpy array is in subdimension of another numpy array
By : Goran Iliev
Date : March 29 2020, 07:55 AM
it helps some times Here's one vectorized approach based on the perrow offsetting as discussed in more details in Vectorized searchsorted numpy's solution  code :
# https://stackoverflow.com/a/40588862/ @Divakar
def searchsorted2d(a,b):
m,n = a.shape
max_num = np.maximum(a.max()  a.min(), b.max()  b.min()) + 1
r = max_num*np.arange(a.shape[0])[:,None]
p = np.searchsorted( (a+r).ravel(), (b+r).ravel() ).reshape(m,1)
return p  n*(np.arange(m)[:,None])
def numpy_isin2D(A,B):
sB = np.sort(B,axis=1)
idx = searchsorted2d(sB,A)
idx[idx==sB.shape[1]] = 0
return np.take_along_axis(sB, idx, axis=1) == A
In [351]: A
Out[351]:
array([[5, 0, 3, 3],
[7, 3, 5, 2],
[4, 7, 6, 8],
[8, 1, 6, 7],
[7, 8, 1, 5]])
In [352]: B
Out[352]:
array([[8, 4, 3, 0, 3, 5],
[0, 2, 3, 8, 1, 3],
[3, 3, 7, 0, 1, 0],
[4, 7, 3, 2, 7, 2],
[0, 0, 4, 5, 5, 6]])
In [353]: numpy_isin2D(A,B)
Out[353]:
array([[ True, True, True, True],
[False, True, False, True],
[False, True, False, False],
[False, False, False, True],
[False, False, False, True]])

How to sort a multi dimension PHP array with a key DESC wise without rearranging its index (can remove those elements)
By : user2106323
Date : March 29 2020, 07:55 AM
like below fixes the issue This will work for you for sure. Check out the below methods. array_column array_unique array_multisort code :
array_multisort(array_column($array, 'directors_count'), SORT_DESC,
array_column($array, 'user_id'), SORT_DESC,
$array);
$tempArr = array_unique(array_column($array, 'directors_count'));
$final_array = array_intersect_key($array, $tempArr);
print_r($final_array);
Array (
[0] => Array ( [user_id] => 10 [directors_count] => 6 )
[1] => Array ( [user_id] => 12 [directors_count] => 5 )
[2] => Array ( [user_id] => 15 [directors_count] => 2 )
[4] => Array ( [user_id] => 16 [directors_count] => 1 )
[7] => Array ( [user_id] => 17 [directors_count] => 0 )
)

