当#table_name返回非0值时？
再说一遍，当 table.getn(table_name) 确实返回非 0 值时？
最佳答案
仔细阅读手册:
2.5.5 - The Length Operator
The length operator is denoted by the unary operator #. The length of a string is its number of bytes (that is, the usual meaning of string length when each character is one byte).
The length of a table t is defined to be any integer index n such that t[n] is not nil and t[n+1] is nil; moreover, if t[1] is nil, n can be zero. For a regular array, with non-nil values from 1 to a given n, its length is exactly that n, the index of its last value. If the array has "holes" (that is, nil values between other non-nil values), then #t can be any of the indices that directly precedes a nil value (that is, it may consider any such nil value as the end of the array).
关于Lua，表的大小(#table_name 或 table.getn(table_name)，有时返回 0，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10718273/