Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Get an object only if it exists
ResourceFunction["ObjectIfExists"][obj,def] gives obj if it exists and def otherwise. |
Check if a given file exists:
In[1]:= | ![]() |
Out[1]= | ![]() |
Verify a file exists:
In[2]:= | ![]() |
Out[3]= | ![]() |
When a file does not exist, create one:
In[4]:= | ![]() |
Out[4]= | ![]() |
Add to a databin if it exists, otherwise create a new one:
In[5]:= | ![]() |
Out[5]= | ![]() |
Deploy an API with a permissions group if one already exists:
In[6]:= | ![]() |
Out[6]= | ![]() |
In[7]:= | ![]() |
Out[7]= | ![]() |
Create a list of object references for objects that do not exist:
In[8]:= | ![]() |
Out[8]= | ![]() |
Create only one of the object references:
In[9]:= | ![]() |
Out[9]= | ![]() |
Create a tool that finds the first existent object on the list:
In[10]:= | ![]() |
In[11]:= | ![]() |
Out[11]= | ![]() |
When an object does not exist and no default is given, Missing is used.:
In[12]:= | ![]() |
Out[12]= | ![]() |
The default does not evaluate until it is needed:
In[13]:= | ![]() |
Out[18]= | ![]() |
In this case it evaluates:
In[19]:= | ![]() |
Out[19]= | ![]() |
This work is licensed under a Creative Commons Attribution 4.0 International License