%dw 2.0
import * from dw::core::Objects
output application/json
---
{ "keySet" : keySet({ "a" : true, "b" : 1}) }
keySet
keySet<K, V>(obj: { (K)?: V }): Array<K>
Returns an array of key names from an object.
This function is Deprecated. Use dw::Core::keysOf, instead.
Example
This example returns the keys from the input object.
Example
This example illustrates a difference between keySet
and nameSet
.
Notice that keySet
retains the attributes (name
and lastName
)
and namespaces (xmlns
) from the XML input, while nameSet
returns
null
for them because it does not retain them.
Source
%dw 2.0
import * from dw::core::Objects
var myVar = read('<users xmlns="http://test.com">
<user name="Mariano" lastName="Achaval"/>
<user name="Stacey" lastName="Duke"/>
</users>', 'application/xml')
output application/json
---
{ keySetExample: flatten([keySet(myVar.users) map $.#,
keySet(myVar.users) map $.@])
}
++
{ nameSet: flatten([nameSet(myVar.users) map $.#,
nameSet(myVar.users) map $.@])
}