Warning: Each child in an array or iterator should have a unique “key” prop. Check the render method of `ListView`

I’ve had exactly the same problem as you for a while now, and after looking at some of the suggestions above, I finally solved the problem. It turns out (at least for me anyway), I needed to supply a key (a prop called ‘key’) to the component I am returning from my renderSeparator method. Adding a key … Read more

When do I need a fb:app_id or fb:admins?

The doc for the facebook like button says , “When your Web page represents a real-world entity, things like movies, sports teams, celebrities, and restaurants, use the Open Graph protocol to specify information about the entity.” I’m adding like buttons to a blog posts/videos/articles which aren’t really entities. Right? So I don’t need fb:app_id or … Read more

When do I need a fb:app_id or fb:admins?

The doc for the facebook like button says , “When your Web page represents a real-world entity, things like movies, sports teams, celebrities, and restaurants, use the Open Graph protocol to specify information about the entity.” I’m adding like buttons to a blog posts/videos/articles which aren’t really entities. Right? So I don’t need fb:app_id or … Read more

Invisible characters – ASCII

How a character is represented is up to the renderer, but the server may also strip out certain characters before sending the document. You can also have untitled YouTube videos like https://www.youtube.com/watch?v=dmBvw8uPbrA by using the Unicode character ZERO WIDTH NON-JOINER (U+200C), or ‌ in HTML. The code block below should contain that character:

What is fbclid? the new facebook parameter

For two days, I have noticed that the URL that I publish on Facebook, there is a parameter is added:?fbclid=uFCrBkUgEvKg…To be more precise something like: http://example.com?fbclid=uFCrBkUgEvKg… Does anyone know what this parameter does?What is it for and what is the use of the developers? Thanks for your comments.

Official Facebook Connect button as PNG

You can get the official “Log in with Facebook” button here. ZIP has PNGs for different sizes https://developers.facebook.com/docs/facebook-login/checklist/#brandedlogin EDIT 26/07/2014: Facebook seems to have removed those image assets. They now suggest you using a Javascript log in button with their button style. https://developers.facebook.com/docs/plugins/login-button EDIT 21/02/2018: Facebook has updated the guidelines with a new “Continue on Facebook” button … Read more