Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Deflatten the keys in a flat Association to create a nested Association
ResourceFunction["AssociationKeyDeflatten"][<|{k1,1,k1,2,…}→val1,{k2,1,k2,2,…}→val2,…|>] gives a nested Association assoc where each valn is found at assoc[kn,1,kn,2,…]. | |
ResourceFunction["AssociationKeyDeflatten"][assoc,f] uses f to interpret the keys of assoc as lists. |
Create a nested Association from a flat Association with lists as keys:
In[1]:= |
Out[1]= |
Keys not wrapped in a list are unchanged:
In[2]:= |
Out[2]= |
Provide a function to interpret keys as lists:
In[3]:= |
Out[3]= |
Values held by RuleDelayed will not be evaluated:
In[4]:= |
Out[4]= |
AssociationKeyDeflatten also works with lists of rules:
In[5]:= |
Out[5]= |
In[6]:= |
Out[6]= |
Deflatten the keys of an Association:
In[7]:= |
Out[7]= |
In[8]:= |
Out[8]= |
Use AssociationKeyFlatten to get the original Association:
In[9]:= |
Out[9]= |
If f and g are partial inverses of each other, AssociationKeyDeflatten[…,f] and AssociationKeyFlatten[…,g] typically will be as well:
In[10]:= |
In[11]:= |
Out[11]= |
In[12]:= |
Out[12]= |
In[13]:= |
Out[13]= |
In[14]:= |
Out[14]= |
Convert an Association where keys are file paths into a nested Association:
In[15]:= |
Out[15]= |
In[16]:= |
Out[16]= |
Get everything under a particular directory:
In[17]:= |
Out[17]= |
Revert to the flat Association:
In[18]:= |
Out[18]= |
In[19]:= |
Out[19]= |
This work is licensed under a Creative Commons Attribution 4.0 International License