Using map() and filter() with lambda expressions
In this video, I review the example of the previous two videos, "A first look at the map-filter-reduce paradigm" and "Modeling 'rules in memory' with map() and filter()", and show how we can use the map() and filter() built-ins without having to define a functions. That is achieved with lambda expressions that upon evaluation create new function objects that have no name. Other than that, they work the same way as "normal" functions. The point here is that we do not want to define a function with a name if we only call the function once (i.e., map() and filter() make the calls to be precise) and then never again.
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The lecture is based on the free book "Introduction to Python & Programming".
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INSTRUCTOR
Alexander Hess, PhD Student
WHU - Otto Beisheim School of Management, Vallendar, Germany
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