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21Arrays: ordered collections
22Dictionaries: key-value pairs
23Sets: unique values
24Iterating and transforming
25What map does
26map: syntax and usage
27map: practical examples
28map: edge cases and pitfalls
29Common mistakes with map
30What filter does
31filter: syntax and usage
32filter: practical examples
33filter: edge cases and pitfalls
34Common mistakes with filter
35reduce and sorted
36Value semantics: copy on write
37Defining and calling functions
38Argument labels and parameter names
39Default values and variadic parameters
40Closures: functions as values
41Trailing closure syntax
42Capturing values
43Escaping closures
44Higher-order functions

21Arrays: ordered collections
22Dictionaries: key-value pairs
23Sets: unique values
24Iterating and transforming
25What map does
26map: syntax and usage
27map: practical examples
28map: edge cases and pitfalls
29Common mistakes with map
30What filter does
31filter: syntax and usage
32filter: practical examples
33filter: edge cases and pitfalls
34Common mistakes with filter
35reduce and sorted
36Value semantics: copy on write
37Defining and calling functions
38Argument labels and parameter names
39Default values and variadic parameters
40Closures: functions as values
41Trailing closure syntax
42Capturing values
43Escaping closures
44Higher-order functions

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Lesson 22 of 2,511·2. Collections and FunctionsFree lesson

Dictionaries: key-value pairs

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