Whether spase array operations should be conducted safely, with careful checking of data conventions and exceptions thrown if expectations are not met. Normally false.

Return the arity of the sparse array x.

Return the largest arity among the arities of the next dimension layer of the sparse array x.

Basically, any vector can be considered as a dense array of one dimension. If we’re seeking a dense array of more than one dimension, the number of dimensions should be specified as d.

How many usable dimensions (represented as vectors) does the dense array x have?

Return a sparse array representing the content of the dense array x, assuming these axes if specified. NOTE THAT if insufficient values of axes are specified, the resulting sparse array will be malformed.

Return the value in this sparse array at these coordinates.

Make a sparse array with these dimensions. Every member of dimensions must be a keyword; otherwise, nil will be returned.

Merge two arrays a1, a2, which may be either dense or sparse but which should have the same number of axes and compatible dimensions, and return a new dense array preferring values from a2.

Merge this dense array d with this sparse array s, returning a new dense array with the same arity as d, preferring values from s where there is conflict

Return a sparse array taking values from sparse arrays a1 and a2, but preferring values from a2 where there is a conflict. a1 and a2 must have the same dimensions in the same order, or nil will be returned.

Return a sparse array like this array but with this value at these coordinates. Returns nil if any coordinate is invalid.

true if x is a sparse array conforming to the conventions established by this library, else false.

Return a dense array representing the content of the sparse array x.

NOTE THAT this has the potential to consume very large amounts of memory.