notev | : pencil2 : Nyakku 的个人博客

Flow at its core is a type system Which adds static type checker to javascript.

In javascript you can do things like

Since you got it work, I will go with the second error.

You should install preset-stage-0 from Babel and transform-runtime

and add it to your .babelrc:

Change

export default App; To

You need to assign a function to onTouchTap event and that function will get called whenever you clicked on that item, but you are assigning a value by calling that function (you don't need to call that function), remove ().

Write it like this by using arrow function:

I guess I finally understood the confusion.

In { this.handleCreateNote } you are passing a function which is then called by the event handler. You are not calling that function, React is calling it.

In this.handleCreateNote() you are calling the function by yourself. That's why () has to be there. Always when a function is called, the parenthesis are needed.

Compare:

First create a copy of existing state array, then use array.push to add a new data, then use setState to update the state array value.

Like this:

Method definition. Since you are inside class body declaration you need to replace

It seems that the easiest solution is to pipe the data to the file and then start vim.