state

If I have a react component that had a property set on it's state: onClick() { this.setState({ foo: 'bar' }); } Is it possible to remove "foo" here from Object.keys(this.state) ? The replaceState method looks like the obvious method to try but it's since been depreciated. You can set foo to undefined , like so var Hello = React.createClass({ getInitialState: function () { return { foo: 10, bar: 10 } }, handleClick: function () { this.setState({ foo: undefined }); }, render: function() { return ( <div> <div onClick={ this.handleClick.bind(this) }>Remove foo</div> <div>Foo { this.state.foo }<

I've got 5 states in my app, and I use BOOL flags to mark them. But it isn't straightforward, because I have to write 5 lines to change all flags when I want to change state. Can you write some ideas or simple code to solve this problem? code: //need to choose second state flag1 = false; flag2 = true; flag3 = false; flag4 = false; flag5 = false; Also, it's to bad because I can choose 2 states one time. P.S. I found modern and more Apple-way. Answer below. Use typedef enum to define all possible states using bitmasks. Note this will give you a maximum of up to 64 different states (on most

I have a js application that never reloads the page, so when navigating I need to remove TinyMCE controls entirely, and then I want to re-initialize when navigating to an area that needs it. I tried the accepted answer to this question, but it seems to do nothing. How do i remove tinyMCE and then re-add it? tinymce.EditorManager.execCommand('mceRemoveControl',true, editor_id); and my specific implimentation: //if I throw an alert here, it does get called, so I know it's not null if (tinyMCE.getInstanceById("main-text")) tinyMCE.EditorManager.execCommand('mceRemoveControl', true, "main-text");

I've been using rails, merb, django and asp.net mvc applications in the past. What they have common (that is relevant to the question) is that they have code that sets up the framework. This usually means creating objects and state that is persisted until the web server is recycled (like setting up routing, or checking which controllers are available, etc). As far as I know PHP is more like a CGI script that gets compiled to some bytecode each time it's run, and after the request it's discarded. Of course you can have sessions, to persist data between requests from the same user, and as I see

Have read over a number of related questions here at SO, as well as looked through the Android docs and source to try to figure this out, but I am stumped, although given that the listSelector seems to only apply styles on selected items, I'm not shocked... I have a Listview defined in main.xml here: <?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent"