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Question on Unsorted Array? Help?

You have unsorted array of strings, like:
my @arr = qw(hello World Show must go on);
Print this array, sorted in reversed case-insensitive order.


Guys...

What the following code is doing?

char *a=...., *b=....;
while(*b++ = *a++);


Guys- Please help me solve this problem. Thanks a lot.

Help solve a problem regarding FUNCTION

What the followng function is doing:

string f(const string &x) {
return x.empty()? x : f(x.substr(1)) + x[0];
}


Guys - Please help solve this...