Week 4 Day 1 - The Standard Library & Ranges

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Bill Kerney

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Published on February 1, 2021 10:30:36 PM ● Video Link: https://www.youtube.com/watch?v=l8WX2WRMPd4

Duration: 1:33:19

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Today we talked about the various things in the standard library, and how the concept of ranges plays in it it. A range is two iterators (iterators are kinda like a pointer) that point to the beginning and ONE PAST the end of the elements in the data structure that you want to do the function on. If you want to do the whole data structure, you use begin and end, like this:
sort(vec.begin(),vec.end()); (End() points one past the end of the vector.)


You can add ints to an iterator to create ranges like this:
random_shuffle(vec.begin(),vec.begin()+10); //Shuffles the first 10 elements of the vector


(Obviously you want to bounds check before just adding 10 to .begin().)