Firebase Auth, how to know new user signed up, rather than existing user sign in?

How can I color dots in a xy scatterplot according to column value?

How to update a claim in ASP.NET Identity?

What does {0} mean when initializing an object?

Accessing members of items in a JSONArray with Java

How to log SQL statements in Spring Boot?

Powershell Get-WebSite name parameter is ignored

How to detect scroll to bottom of html element

Java synchronized method

How to test controllers with CodeIgniter?

Detect Visual Composer

Matplotlib: Specify format of floats for tick labels

Rails join a list of strings with commas and "and" before the last