C++ - std::vector add, insert, remove, process, erase, swap, sort, clear

Here is some examples of how to use std::vector with string for most of the common operations that can be performed on std::vector.

The following example assume the following has been declared

1	std::vector<std::string> vec;

Adding Items

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vec.push_back("Item 1"); vec.push_back("Item 2"); vec.push_back("Item 3"); vec.push_back("Item 4"); vec.push_back("Item 5");

Adding Items to front

1 2	vec.insert(vec.begin(), "Front 2"); vec.insert(vec.begin(), "Front 1");

Remove Last Item

1	vec.pop_back();

Remove First Item

1	vec.erase(vec.begin());

Process All Items

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for(std::vector<std::string>::iterator it = vec.begin(); it != vec.end(); it++) {   printf("%s\n", it->c_str()); }

Process All Items

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for(size_t i = 0; i < vec.size(); i++) {   printf("%s\n", vec[i].c_str()); }

Reverse The Order - Note you can also just run the above backwards instead.

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for(size_t i = 0; i < vec.size() / 2; i++) {   std::string tmp = vec[i];   vec[i] = vec[vec.size() - i - 1];   vec[vec.size() - i - 1] = tmp; }

Sorting

1	std::sort(vec.begin(), vec.end());

Find and Remove an item

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for(std::vector<std::string>::iterator it = vec.begin(); it != vec.end(); it++) {   if (*it == "Item 2")   {     vec.erase(it);     break;  //it is now invalud must break!   } }

Clear All Items

1	vec.clear();