Last element of a for loop - for-loop

Question

I'm splitting a document by a string delimiter in C++.
This is a minimal Python code to demonstrate the problem. la is splitted by 'x' to get (a,b,b) and (c,d) (only the element between x, or between x and end of file is recorded)
la = ['a','x','a','b','b','x','c','d']
out = []
tmp = []
inside = False
for a in la:
if a == "x":
if inside:
out.append(tmp)
tmp = []
inside = True
continue
if inside:
tmp.append(a)
out.append(tmp)
for a in out:
print a
There is code duplication here for the last element out.append(tmp). How do I move it inside the loop?
(out.append(tmp) is actually some large code and it's prone to error to write in different places).
P/S: Since the actual code is in C++, no special function from python is allowed to call in solving the problem
A minimal C++ code, I'm reading from a stringstream:
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
int main() {
// your code goes here
stringstream instream("a x b c d x c d");
vector<string> result;
string word, content;
while(getline(instream, word, ' ')) {
if (word == "x") {
result.push_back(content);
content = "";
continue;
}
content += word;
}
return 0;
}

Answer 1

Not sure why you would not just append outside the loop but you can check the length in the loop to catch the end elements:
out = []
tmp = []
for ind, ele in enumerate(la):
if ele == "x":
if tmp:
out.append(tmp)
tmp = []
elif ind == len(la) - 1:
tmp.append(ele)
out.append(tmp)
else:
tmp.append(ele)
You can use range in place of enumerate.
If you want to use continue you can remove the else:
for ind, ele in enumerate(la):
if ele == "x":
if tmp:
out.append(tmp)
tmp = []
continue
elif ind == len(la) - 1:
out.append(tmp)
tmp.append(ele)
I have zero experience with c++ but using stringstream.eof to catch the end of file might to do what you want:
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
int main() {
// your code goes here
stringstream instream("x a x b c d x c d x");
vector<string> result;
string word, content;
while(true) {
getline(instream, word, ' ');
if (instream.eof()){
if (word != "x"){
content += word;
}
cout << content << "\n";
break;
}
if (word == "x") {
result.push_back(content);
cout << content << "\n";
content = "";
continue;
}
content += word;
}
return 0;
}
Output:
a
bcd
cd
You also need to handle the case where he first character is x where you would output an empty string