[ map->forEachKey ]
The [map->forEachKey] method iterates through a map allowing an operation to be performed on each element of the map in turn.
[map->forEachKey] returns the key of each of the key/value pairs of the map. This method is the compliment to the [map->forEach] method which returns the values of the map elements. If you need to perform operations on the entire map element use the [map->forEachPair] method.
- Syntax
map->forEachKey => {^ ^}Examples
- Beginner
To perform an operation using the keys of a map
Use the [map->forEachKey] method. This example outputs the capitalized keys of a map.
Code
var (colours = map( 'red'='#ff0000',
'green' = '#00ff00',
'blue' = '#0000ff',
'grey' = '#aaaaaa') )
$colours->forEachKey => {^
#1->uppercase
#1+'\n'
^}Result
BLUE GREEN GREY RED
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