Function ravel_index 

pub fn ravel_index<I>(indices: &[I], shape: &[usize]) -> usize
where
    I: AsIndex,

Compute the ravel index for the given coordinates.

This returns the row-major order raveling:

• strides[-1] = 1
• strides[i] = strides[i+1] * dims[i+1]
• dim_strides = coords * strides
• ravel = sum(dim_strides)

Arguments

• indices: the index for each dimension; must be the same length as shape.
• shape: the shape of each dimension; be the same length as indices.

Returns

• the ravel offset index.