In Emacs, with idris-mode 20200522.808, when I load the file using C-c C-l, I'm presented with a list of holes, and the message "Press the [P] buttons to solve the holes interactively in the prover."
The prover consists of two windows, *idris-proof-obligations* and *idris-proof-script*. But I can't figure out how this is supposed to work. I tried typing in the same sort of terms I would use in the command-line prover, like intro `{{x}} and rewriteWith mylemma, but when I type M-n to "advance", I got these error messages:
Prover error: (input):1:7:
|
1 | intro ‘{{n}}
| ^
unexpected ’‘’
expecting end of input or name
Prover error: (input):1:8:
|
1 | rewriteWith sym (fibAuxEq 0 1 n)
| ^
unexpected ’W’
expecting tactic
What should I be doing instead?
It accepts proof tactics in the language of the old theorem prover, which is deprecated.
Related
I'm trying to understand this snippet code from:
https://code.kx.com/q/kb/loading-from-large-files/
to customize it by myself (e.x partition by hours, minutes, number of ticks,...):
$ cat fs.q
\d .Q
/ extension of .Q.dpft to separate table name & data
/ and allow append or overwrite
/ pass table data in t, table name in n, : or , in g
k)dpfgnt:{[d;p;f;g;n;t]if[~&/qm'r:+en[d]t;'`unmappable];
{[d;g;t;i;x]#[d;x;g;t[x]i]}[d:par[d;p;n];g;r;<r f]'!r;
#[;f;`p#]#[d;`.d;:;f,r#&~f=r:!r];n}
/ generalization of .Q.dpfnt to auto-partition and save a multi-partition table
/ pass table data in t, table name in n, name of column to partition on in c
k)dcfgnt:{[d;c;f;g;n;t]*p dpfgnt[d;;f;g;n]'?[t;;0b;()]',:'(=;c;)'p:?[;();();c]?[t;();1b;(,c)!,c]}
\d .
r:flip`date`open`high`low`close`volume`sym!("DFFFFIS";",")0:
w:.Q.dcfgnt[`:db;`date;`sym;,;`stats]
.Q.fs[w r#]`:file.csv
But I couldn't find any resources to give me detail explain. For example:
if[~&/qm'r:+en[d]t;'`unmappable];
what does it do with the parameter d?
(Promoting this to an answer as I believe it helps answer the question).
Following on from the comment chain: in order to translate the k code into q code (or simply to understand the k code) you have a few options, none of which are particularly well documented as it defeats the purpose of the q language - to be the wrapper which obscures the k language.
Option 1 is to inspect the built-in functions in the .q namespace
q).q
| ::
neg | -:
not | ~:
null | ^:
string | $:
reciprocal| %:
floor | _:
...
Option 2 is to inspect the q.k script which creates the above namespace (be careful not to edit/change this):
vi $QHOME/q.k
Option 3 is to lookup some of the nuggets of documentation on the code.kx website, for example https://code.kx.com/q/wp/parse-trees/#k4-q-and-qk and https://code.kx.com/q/basics/exposed-infrastructure/#unary-forms
Options 4 is to google search for reference material for other/similar versions of k, for example k2/k3. They tend to be similar-ish.
Final point to note is that in most of these example you'll see a colon (:) after the primitives....this colon is required in q/kdb to use the monadic form of the primitive (most are heavily overloaded) while in k it is not required to explicitly force the monadic form. This is why where will show as &: in the q reference but will usually just be & in actual k code
I am working through the book "Software Foundations", and am on the last problem in Chapter two. The problem asks to convert a natural number into a binary number, where a binary number is defined in the following ways:
- [is] zero,
- [is] twice a binary number, or
- [is] one more than twice a binary number.
My thought process is that if a natural number is even, then it can be expressed as
double(nat_to_bin n)
However, in my Fixpoint definition, when I tried to write
(evenb n' = true) => double(nat_to_bin)
I got an error because evenb n' is not a constructor of nat. Is there any way for me to create a conditional such that the above line would be a valid function definition, without changing the definition of nat?
Nevermind, I figured out a solution. I can just write the term
match (evenb n') with
| true => ....
Took me a while, though.
I wanted to divide two numbers in Coq because I was trying to implement my own custom Imp language and had a statement:
match (aeval st a1) with
| Some n0 => Some (NDiv n0 (S n))
| None => None
however / returns an error:
Unknown interpretation for notation "_ / _".
and so does NDiv, error:
The reference NDiv was not found in the current environment.
what can I do so that I don't get this error?
How does one do something like the python "integer division" but with nats?
You can use the command Require Import Arith. which will import, among other things, the function Nat.div and the notation _ / _ for it.
Seems like:
Require Import Coq.Init.Nat.
works, but I wonder how I could have searched this more efficiently without having to resort to put this trivial Q on SO.
I would like to have the output of src_R blocks in an org-mode table:
| Variable | Value |
|----------+----------|
| x | src_R{x} |
However, when I export to PDF (via LaTeX) I get the literal src_R{x} rather than the value of the x variable in the underlying R session. I can use the same src_R{x} in text and it works as expected.
Is there a way to support inline source code in tables?
(I have seen this question with a similar title: Code blocks inside tables for org-mode, but the topic is different.)
Thanks to the prompt by Juancho (see comments), I have found the answer here: http://orgmode.org/worg/org-contrib/babel/intro.html#spreadsheet. I first define a named source block to perform my R computation:
#+NAME: my-code
#+BEGIN_SRC R :results output
message(10)
#+END_SRC
(Imagine the output is simply the number 10). Then I insert it into the table like this:
| Variable | Value |
|----------+-------|
| Name | |
#+TBLFM: #2$2='(org-sbe my-code)
Comments:
It seems that org-babel-execute is no longer there, the docs use org-sbe, which works with my 9.0.x org-mode version.
I have wrapped the code output in message() to avoid extra output from R. I have tried various header arguments to the R code (e.g., :results value raw) but I get either extra parentheses, presumably from lisp, or errors.
With org-sbe you can also pass arguments to the code, and even the output of other code blocks. This is explained in the docs referenced above.
I am using the Org mode that comes with Emacs 24.3, and I am having an issue that when Org creates a table from the result of a code block it is replacing characters like '-' and '.' with 0 (integer zero). Then when I pass the table to another code block that's expecting a column of strings I get type errors etc.
I haven't been able to find anything useful, as it seems to be practically un-Googleable. Has anyone had the same problem? If I update to the latest version of org-mode, will that fix it?
EDIT:
I updated to Org 8.2 and this problem seems to have gone away. Now I have another (related) problem, where returning a table with a cell containing a string consisting of one double quote character ('"' in python) messes something up; Org added 2 extra columns to the table, one had something like
(quote (quote ) ())
in it. The reason my tables have things like this in them is that I'm working with part-of-speech tags from natural language data.
It's pretty obvious Org is doing some stuff to try to interpret the table contents, and not dealing well with meta characters. Technically I think these are bugs where Org should be dealing better with unexpected input.
EDIT 2:
Here is a minimal reproduction with Org 7.9.3f (system Python is 3.4):
#+TBLNAME: table
| DT | The |
| . | . |
| - | - |
#+BEGIN_SRC python :var table=table
return table
#+END_SRC
#+RESULTS:
| DT | The |
| 0 | 0 |
| 0 | 0 |
Incidentally, Org does not like the '"' character at all, in tables or in code blocks (I just get a "End of file during parsing" message when the above table has a cell with just '"' in it). It's probably just better to avoid it altogether, so I think my problem is solved. If nobody wants to add anything, I'll answer this myself in a day or so.