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data types to auto #303

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14 changes: 7 additions & 7 deletions chapters/stl_vector/chapter.md
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Original file line number Diff line number Diff line change
Expand Up @@ -158,7 +158,7 @@ nums.push_back(10);
vector<int>::iterator it = nums.begin();
cout << *it << endl; // prints out 10

vector<Particle>::iterator itp = particles.begin(); // get iterator to first element
auto itp = particles.begin(); // get iterator to first element
float xpos = (*itp).pos.x; // use dereference * to access the element value or properties
particle.erase(itp); // pass the iterator to a vector function such as erase
```
Expand All @@ -176,7 +176,7 @@ for(; it != nums.end(); ++it){
}


for(vector<Particle>::iterator it = particles.begin(); it != particles.end(); ++it){
for(auto it = particles.begin(); it != particles.end(); ++it){
cout << (*it).pos.x << end;
}
```
Expand All @@ -186,7 +186,7 @@ Note that when using iterators we want to test that our iterator ( *it* in this

In a while loop the structure would be:
```cpp
vector<Particle>::iterator it = particles.begin();
auto it = particles.begin();

while( it != particles.end() ){
cout << (*it).x << end;
Expand Down Expand Up @@ -220,7 +220,7 @@ bool checkDead( Particle &p ){

Then call *erase* with the iterator returned from *remove_if*:
```cpp
vector<Particle>::iterator it = particles.remove_if(particles.begin(),particles.end(),checkDead);
auto it = particles.remove_if(particles.begin(),particles.end(),checkDead);
particles.erase( it, particles.end() );

// or all in one line
Expand Down Expand Up @@ -309,7 +309,7 @@ It is very important to remember that when erasing a pointer to an object in a v
particlePointers.erase( particlePointers.begin()+1 );

// delete and erase with a loop
vector<Particle>::iterator it = particlePointers.begin();
auto it = particlePointers.begin();
for(; it != particlePointers.end();){
if( (*it)->isDead ){
delete *it;
Expand Down Expand Up @@ -437,7 +437,7 @@ ofApp.cpp using iterators

void ofApp::update(){

for(vector<Particle>::iterator it = particles.begin(); it != particles.end(); it++){
for(auto it = particles.begin(); it != particles.end(); it++){
(*it).update();
}

Expand All @@ -447,7 +447,7 @@ ofApp.cpp using iterators
void ofApp::draw(){

ofTranslate( ofGetWidth()/2, ofGetHeight()/2);
for(vector<Particle>::iterator it = particles.begin(); it != particles.end(); it++){
for(auto it = particles.begin(); it != particles.end(); it++){
(*it).draw();
}
}
Expand Down