function expandStrides( ndims, shape, strides, order ) {
	var out;
	var N;
	var s;
	var i;
	var j;

	N = strides.length;
	j = ndims - N;
	out = [];
	if ( isRowMajor( order ) ) {
		s = abs( strides[ 0 ] ) * shape[ j ]; // at `j` is the size of the first non-prepended dimension
		for ( i = 0; i < j; i++ ) {
			out.push( s );
		}
		for ( i = 0; i < N; i++ ) {
			out.push( strides[ i ] );
		}
	} else { // column-major
		for ( i = 0; i < j; i++ ) {
			out.push( 1 );
		}
		for ( i = 0; i < N; i++ ) {
			out.push( strides[ i ] );
		}
	}
	return out;
}
Expands a strides array to accommodate an expanded array shape (i.e., an array shape with prepended singleton dimensions).

@private
@param {NonNegativeInteger} ndims - number of dimensions
@param {Array} shape - expanded array shape
@param {Array} strides - strides array
@param {string} order - memory layout order
@returns {Array} output strides array

@example
var out = expandStrides( 4, [ 1, 1, 2, 2 ], [ 1, 2 ], 'column-major' );
// returns [ 1, 1, 1, 2 ]

@example
var out = expandStrides( 4, [ 1, 1, 2, 2 ], [ 2, 1 ], 'row-major' );
// returns [ 4, 4, 2, 1 ]