SE_NUM(sememcount)
Allows you to access numerically-named members. This is most useful with arrays. Because of the way JavaScript works, member names that are number use the text representation of that number as their name. Thus, SE_MEM("10") and SE_NUM(10) refer to the same member. Because of internal optimizations, not only is this naming method more convenient for numeric members, it is faster. Note that this method may only be used for non-negative numbers. For negative numbers use a string method (e.g. SE_MEM("-1)).