Writing pure functions is straightforward—output depends solely on input. The challenge lies in how to connect these functions into a cohesive application, known as 'binding'.
In functional programming, particularly using Scala, binding utilizes for expressions, which streamline the process of combining the outputs and inputs of various functions seamlessly.
Life is simplified when the output of one function matches the input of another. This harmony is key to writing more complex applications without friction in data flow.
When functions evolve to yield multiple return types, such as an Int and a String, developers must adapt their strategies to effectively manage and integrate these outputs.
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