multidimensional-array
Stream from two dimensional array in java
Assuming you want to process array of array sequentially in row-major approach, this should work: int[][] arr = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} }; IntStream stream = Arrays.stream(arr).flatMapToInt(x -> Arrays.stream(x)); First it invokes the Arrays.stream(T[]) method, where T is inferred as int[], to get a Stream<int[]>, and then Stream#flatMapToInt() method … Read more
How to initialize 3D array in C++
The array in your question has only one element, so you only need one value to completely initialise it. You need three sets of braces, one for each dimension of the array. int min[1][1][1] = {{{100}}}; A clearer example might be: int arr[2][3][4] = { { {1, 2, 3, 4}, {1, 2, 3, 4}, {1, … Read more
How to convert singleton array to a scalar value in Python?
You can use the item() function: import numpy as np matrix = np.array([[[[7]]]]) print(matrix.item()) Output 7
remove zero lines 2-D numpy array
Use np.all with an axis argument: >>> r[np.all(r == 0, axis=1)] array([[ 0., 0., 0.]]) >>> r[~np.all(r == 0, axis=1)] array([[-1.41421356, -0.70710678, -0.70710678], [ 0. , -1.22474487, -1.22474487]])