Populate dynamics array from file

Question

What is the best way to populate array "in fly" when reading file lines?

But firstly the programmer looping through the file to get numbers of lanes and then in another loop saving content to structure.

I'm looking for the way how to do it in one loop

The accepted to that question answer does just that: push_back into an std::vector — Kolmar
– Kolmar, Commented Jan 19, 2015 at 23:03
Are you thinking of a dynamic array that is not an std::vector? — R Sahu
– R Sahu, Commented Jan 19, 2015 at 23:06
Doesn't matter if is std::vector std:array etc. I'm looking for efficient way :) — Wojtek B
– Wojtek B, Commented Jan 21, 2015 at 21:03

Dmitry K. · Accepted Answer · 2015-01-19 23:10:18Z

0

Alternatively, you can use malloc / realloc to read the array with unknown structure on the fly. Use custom unidirectional lists or std::list when it is not memory and access-time critical.

answered Jan 19, 2015 at 23:10

Dmitry K.

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