CLHS: Section 3.4.4.1.1

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## 3.4.4.1.1 Data-directed Destructuring by Lambda Lists

In data-directed destructuring, the pattern is a sample object of the type to be decomposed. Wherever a component is to be extracted, a symbol appears in the pattern; this symbol is the name of the variable whose value will be that component.

## 3.4.4.1.1.1 Examples of Data-directed Destructuring by Lambda Lists

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