number method Null safety
- String key
Returns the value for the given key
as a num.
Returns null
if the a value for the given key
does not exists, is not
a of the expected typ or it is null
.
Implementation
num? number(String key);
Returns the value for the given key
as a num.
Returns null
if the a value for the given key
does not exists, is not
a of the expected typ or it is null
.
num? number(String key);