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Add Map.map examples. #2704

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Jan 31, 2025
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Add Map.map examples. #2704

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13 changes: 13 additions & 0 deletions lib/core/collections.toit
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Original file line number Diff line number Diff line change
Expand Up @@ -3200,6 +3200,19 @@ class Map extends HashedInsertionOrderedCollection_:
The $block is invoked with two arguments for each entry in this instance:
the key and the value. The returned value becomes the new value for the key.
# Examples
```
map := { "a": 1, "b": 2 }
// Double the values. (Key is not used).
doubled := map.map: | _ value | value * 2
print doubled // => { "a": 2, "b": 4 }
// Prefix the values with the key.
prefixed := map.map: | key value | "$key-$value"
print prefixed // => { "a": "a-1", "b": "b-2" }
```
*/
map [block] -> Map:
result := Map
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