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SimpleList

★ 68 Open GitHub ↗

A simple linked list for Arduino projects

// repository documentation

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# SimpleList

**Use [std::list](https://de.cppreference.com/w/cpp/container/list) whenever possible, or at least [LinkedList](https://github.com/ivanseidel/LinkedList), as it's more tested and still maintained!!!**

Nothing big, just my own implementation of a linked list in c++ for all kind of Arduino projects.  
This Arduino Library was inspired by the [LinkedList](https://github.com/ivanseidel/LinkedList)
and is mostly compatible too it.   
I made it to get a deeper understanding of lists.

## Installation

1) [Download](https://github.com/spacehuhn/SimpleList/archive/master.zip) the source code from GitHub.  
2) Unzip and rename the Folder name to "SimpleList".  
3) Paste it in your Library folder (Usually located somewhere at documents/Arduino/libraries).  
4) Restart the Arduino IDE.

You can also just download the [SimpleList.h](https://github.com/spacehuhn/SimpleList/blob/master/SimpleList.h)
file and paste it in your Arduino sketch folder.

## Usage

### Include the library
```c++
#include <SimpleList.h>  
```

### Creating a SimpleList
```c++
// A list of integer
SimpleList<int> *myLinkedList = new SimpleList<int>();

// A list of 'MyClass'
SimpleList<MyClass> *mySimpleList = new SimpleList<MyClass>();
```

### Getting the list size
```c++
int theSize = myList->size();
```

### Adding compare function
```c++
// Add a compare function to sort or search the list
    list->setCompare([](int &a, int &b) -> int {
      if(a < b) return -1;
      if(a == b) return 0;
      if(a > b) return 1;  
    });
```

### Adding elements
```c++
// add(obj) will add the object at the end of the list
myList->add(myObject);

// add(index, obj) method will insert the object at the specified index
myList->add(0, myObject); // Add at the beginning
myList->add(3, myObject); // Add at index 3

// insert will try to put the object at the correct spot to keep the list isSorted (compare function is required!)
myList->insert(myObject);
```

### Getting elements
```c++
// Get the first element
myObject = myList->get(0);

// Get the third element
myObject = myList->get(2);

// Get the last element
myObject = myList->get(myList->size() - 1);
```

### Sorting the list
```c++
// PLEASE NOTE: compare function must be set!

// Sort the list
list->sort();

// Check if list is currently sorted
bool isSorted = list->isSorted();
```

### Replacing elements
```c++
// Replace the first element
myList->replace(0, myObject);

// Replace the third element
myList->replace(2, myObject);

// Replace the last element
myList->replace(myList->size() - 1, myObject);
```

### Removing elements
```c++
// Remove the first object
myList->remove(0);

// pop() will remove and return the last element
myDeletedObject = myList->pop();

// shift() will remove and return the first element
myDeletedObject = myList->shift();

// clear() will erase the entire list, leaving it with 0 elements
myList->clear();

// Please note that clear() wont free memory from pointers, you have to manually delete/free those!
// Example:
while(list->size() > 0){
	delete myList->get(0).somePointer;
	list->remove(0);
}
```

### Searching for elements
```c++
// PLEASE NOTE: compare function must be set!

// seach() returns the index of the element, not the element itself!
int indexOfSeven = list->search(7);

// When the list is sorted, you can also do a more efficient binary search
// here find the element
int indexOfIntOne = list->binSearch(1);
```

### Counting elements
```c++
// PLEASE NOTE: compare function must be set!
int numberOfZeros = myList->count(0);
```

### Swapping elements
```c++
// swap(index-X, index-Y)
list->swap(0, list->size()-1);
```

SimpleList

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