AWS has unveiled Lambda SnapStart for Python and .NET, enhancing serverless app performance by reducing cold start latency. This feature builds on the success of Lambda SnapStart for Java ...

The anonymous function here takes an argument x and calls the capitalize method on it. The map call ensures that the anonymous function is called once for each item. Modern C++ has lambda expressions.

AWS Lambda currently supports three computer language environments for handler functions: Node.js (JavaScript); Java code packaged as Jar or Zip files; and Python.