75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
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"# Chapter 8: Map, Filter, & Reduce (TL;DR)"
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"The operations we do with sequential data commonly follow the **map-filter-reduce paradigm**: We apply the same transformation to all elements, filter some of them out, and calculate summary statistics from the remaining ones.\n",
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"\n",
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"An essential idea in this chapter is that, in many situations, we need *not* have all the data **materialized** in memory. Instead, **iterators** allow us to process sequential data on a one-by-one basis.\n",
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"\n",
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"Examples for iterators are the `map`, `filter`, and `generator` types."
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