Retrieving values from a dictionary using namespacing

Community Support
,
1

https://learninghub.kx.com/forums/topic/retrieving-values-from-a-dictionary-using-namespacing

Hi all,

 

I would like to understand the following behaviour:

If the dictionary values are all atoms of the same type, treating the dictionary as a namespace will throw an error when retrieving a value. Otherwise it seems to work ok.

 

q)dict:`FAWF`faw`erses`gdgr`gr!til 5 
q)dict 
FAWF | 0 
faw  | 1 
erses| 2 
gdgr | 3 
gr   | 4 

q)dict.gr 
'gr [0] 
dict.gr ^ 

q)dict:`FAWF`faw`erses`gdgr`gr!(2;44i;54.7;`fs;"ff") 
q)dict 
FAWF | 2 
faw  | 44i 
erses| 54.7 
gdgr | `fs 
gr   | "ff" 

q)dict.gr 
"ff" 
q)dict:`FAWF`faw`erses`gdgr`gr!enlist each til 5 
q)dict 
FAWF | 0 
faw  | 1 
erses| 2 
gdgr | 3 
gr   | 4 

q)dict.gr 
,4

Thanks,

Eoghan

2

Probably because this syntax is only intended to use with regular namespaces (whose names begin with a dot). When you create a namespace it always has a mixed list in its values because a ` | :: item is implicitly inserted into it. So the lookup code might be written with the assumption that this always needs to be the case.