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14
votes
1answer
353 views

Why did the Mathematica Language choose term rewriting instead of the Lambda Calculus as its basis?

Now we can see that Church was associated with the Simply Typed Lambda Calculus. Indeed, it seems he explained the Simply Typed Lambda Calculus in order to reduce misunderstanding about the Lambda ...
6
votes
1answer
169 views

How convert old version 2.2 .ma files to .nb notebooks?

I have a lot of old Mathematica version 2.2 .ma files that simply crash the current (10.4.1) version of Mathematica if I try to open them. Is there some way to ...
8
votes
2answers
112 views

Seeking for method to speedup and get more flexable control Notebook History

When doing calculations in notebook, I modify the code a lot, and there are several versions of similar codes in the same notebook. But I found myself easily forgot which version is the newest, and I ...
0
votes
0answers
61 views

Is it possible to change default $HistoryLength [duplicate]

By default $HistoryLength is set to \[Infinity]. This is often unnecessary and can cause unecessary memory usage. I can of ...
1
vote
0answers
30 views

autocomplete or forward search input histories

I think there are many bash users here. In bash, a forward search of input histories can be done by Ctrl+r, which let you edit your previous similar input and reuse it. Is there a similar function in ...
7
votes
2answers
102 views

Undo history cleared after removing comments - bug?

If I've written some code followed by a comment, like this: x(*y*) and I remove the comment by first removing the right delimiter and then the left, my undo ...
6
votes
2answers
229 views

Save all input History in a log file

I would like to write some code in my init.m to save all inputs {In[1],In[2],...In[lastone]} right before I close the kernel (or exit Mathematica). Such a script ...
1
vote
0answers
329 views

Revert Notebook to earlier version using Notebook History

Is it possible to revert a notebook to its earlier version via the Mathematica's Notebook History panel? It would be nice if I could select a point in time in the bottom graph and revert back to that ...
2
votes
0answers
67 views

How to retroactively merge cell change history according to a merge interval

I recently noted that there is an option in the options inspector to set a merge interval for cell changes. This (I think) prevents a quick series of changes from spamming your notebook history with a ...
8
votes
2answers
201 views

Obtain input expression from history without evaluating

I typed and evaluated an expression, but deleted it from the notebook. For instance, suppose it was In[1]:= Round@SessionTime[] Out[1]= 2 I now want to retrieve ...