All Questions
Tagged with built-in-symbols expression-manipulation
5 questions
3
votes
1
answer
240
views
Test whether an expression contains a particular pattern
How to test whether an expression contains a particular pattern ?
I made a function for myself that tests whether an expression contains Plus or not.
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- 4,345
1
vote
3
answers
138
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Why do atomic objects like 56 have a head if they're supposed to be, well, atomic?
This question follows from this one I made earlier.
If you ask for FullForm[4] you will get back 4, and that's fine. ...
- 347
6
votes
5
answers
375
views
First evaluate in place all subexpressions matching pattern before substituting result
ReplaceAll[expr, {patt1:>rhs1, patt2:>rhs2, …}] works by looking for and making all possible replacements of subexpressions in ...
- 19.8k
1
vote
1
answer
55
views
Low level built-in function to transpose expression (not array) [closed]
I have an expression like this
F[G[1, b], G[3, y], G[4, y], G[5, u]]
that I would like to Transpose to obtain
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- 19.8k
32
votes
2
answers
2k
views
List of atomic expressions
I was surprised to see Graph objects are atomic. Is there a way (through documentation or programmatically) to find all atomic heads?
The ones I know of are:
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- 36.8k