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4.2.3 Simple grids and default values

A simple grid is one which only has one layer, that is, the contents of the objects are the scalar elements (and not other array-like objects). Both array and foreign-array are simple grids. The function make-simple-grid will create a simple grid. It takes the optional keyword arguments (default): grid-type (*default-grid-type*), dimensions (*default-dimensions*), element-type (*default-element-type*), initial-element, initial-contents.