React Map Index. Next you will need to edit your Appjs file and replace the code with your component that will load a Google Map. We pass it to the key property of the component so that when any changes occur React can re-render only the component that has changed rather than re-rendering.
The arraymap function accepts thisValue as a second parameter and it is optional. Todosmap key index. It is because of the uniqueness of each stored key.
Next you will need to edit your Appjs file and replace the code with your component that will load a Google Map.
Todosmap key index. That syntax means that you want to get properties todo and index from first argument of function. The map function expects a callback as the argument and executes it once for each element in the array. Step 2 Using Map and GoogleApiWrapper.
