Welcome! Today, we'll explore Data Projection Techniques. Data projection is akin to using a special light to make diamonds shine brighter amidst other gems, aiding their identification.

This lesson will shed light on the concept of data projection, its implementation with C++'s std::transform function, and how to integrate it with filtering. Let's forge ahead!

Data projection involves applying a function to elements of a data stream, resulting in a reshaped view. A common data projection instance is selecting specific fields from databases.

Data projection in C++ uses the std::transform function. Here's an illustration of finding each number's square in a vector of numbers:

For complex operations on data streams, C++ employs lambda functions (anonymous functions). Let's convert a vector of sentences to lowercase: