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How do I remove an array dimension where the elements sum to zero?


How do I remove an array dimension where the elements sum to zero?

By : Ten5
Date : November 21 2020, 07:01 PM
fixed the issue. Will look into that further Here is an alternative to looping, using the function ALL and logical indexing:
code :


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Remove duplicate elements off a multi-dimension array

Remove duplicate elements off a multi-dimension 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.array-unique.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

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
hope this fix your issue I have this array: , Shortest thing I could think of:
code :
inner_value_array = array_hash.inject([]) {|result,h| result << h.delete("inner_value") }
c++ How to remove any empty elements in a two dimension vector

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 sub-dimension of a numpy array is in sub-dimension of another numpy array

Fast way to check if elements in sub-dimension of a numpy array is in sub-dimension 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 per-row 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)

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 ) 
)
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