Re: a sub within a sub -- revisiting

[ikegami]

The above works

No, it doesn't. Call foo twice and check the results. (It always returns undef after the first call.)

[PeterPeiGuo]

Just want to add one point to make this observation complete: this issue can be fixed by doing what the anonymous monk suggested above.

However, the best is to code in a simple and straight forward manner. That's the principle.