I'm using a Lua developer environment called Lua on the iPad.
This hash works and compiles:
imgs = {readImage (spriteexample1, pos.x, pos.y), readImage(spriteexample2, pos.x,
pos.y), readImage(spriteexample3, pos.x, pos.y), readImage(spriteexample4, pos.x,
pos.y), readImage(spriteexample5, pos.x, pos.y), readImage(spriteexample6, pos.x, pos.y)}
(It cuts off on the second line after spriteexample4 on my screen.) The problem is, when I go on to the third line to add two more sprites as values, it tells me I must close the brackets on the first line. Any help?
If I copy the code you have and run it (after defining a bogus readImage() function and pos={x=0,y=0}), no problem, so there must be a weird character like perhaps a UTF-8 character that shows up normal in your editor but interpreter doesnt' like. Try opening the file in a tool like notepad++ with View | Show SYmbol | Show all characters.
Related
I need to remove all \text generated by TeXForm in Mathematica.
What I am doing now is this:
MyTeXForm[a_]:=StringReplace[ToString[TeXForm[a]], "\\text" -> ""]
But the result keeps the braces, for example:
for a=fx,
the result of TeXForm[a] is \text{fx}
the result of MyTeXForm[a] is {fx}
But what I would like is it to be just fx
You should be able to use string patterns. Based on http://reference.wolfram.com/mathematica/tutorial/StringPatterns.html, something like the following should work:
MyTeXForm[a_]:=StringReplace[ToString[TeXForm[a]], "\\text{"~~s___~~"}"->s]
I don't have Mathematica handy right now, but this should say 'Match "\text{" followed by zero or more characters that are stored in the variable s, followed by "}", then replace all of that with whatever is stored in s.'
UPDATE:
The above works in the simplest case of there being a single "\text{...}" element, but the pattern s___ is greedy, so on input a+bb+xx+y, which Mathematica's TeXForm renders as "a+\text{bb}+\text{xx}+y", it matches everything between the first "\text{" and last "}" --- so, "bb}+\text{xx" --- leading to the output
In[1]:= MyTeXForm[a+bb+xx+y]
Out[1]= a+bb}+\text{xx+y
A fix for this is to wrap the pattern with Shortest[], leading to a second definition
In[2]:= MyTeXForm2[a_] := StringReplace[
ToString[TeXForm[a]],
Shortest["\\text{" ~~ s___ ~~ "}"] -> s
]
which yields the output
In[3]:= MyTeXForm2[a+bb+xx+y]
Out[3]= a+bb+xx+y
as desired.
Unfortunately this still won't work when the text itself contains a closing brace. For example, the input f["a}b","c}d"] (for some reason...) would give
In[4]:= MyTeXForm2[f["a}b","c}d"]]
Out[4]= f(a$\$b},c$\$d})
instead of "f(a$\}$b,c$\}$d)", which would be the proper processing of the TeXForm output "f(\text{a$\}$b},\text{c$\}$d})".
This is what I did (works fine for me):
MyTeXForm[a_] := ToString[ToExpression[StringReplace[ToString[TeXForm[a]], "\\text" -> ""]][[1]]]
This is a really late reply, but I just came up against the same issue and discovered a simple solution. Put a space between the variables in the Mathematica expression that you wish to convert using TexForm.
For the original poster's example, the following code works great:
a=f x
TeXForm[a]
The output is as desired: f x
Since LaTeX will ignore that space in math mode, things will format correctly.
(As an aside, I was having the same issue with subscripted expressions that have two side-by-side variables in the subscript. Inserting a space between them solved the issue.)
I write a lot of Geany snippets. I would like to add a snippet for %cursor% when writing snippets. I added this in the [Default] snippets:
cur=%cursor%
Problem being that will evaluate to placing the cursor, so disappears.
I am looking for an escape sequence for the %. I have tried \% and %% but no luck.
cur=%curso%cursor%%
is an OK workaround as I only need to add an r, but is not ideal.
The % is escaped with {pc} in Geany, so:
cur={pc}cursor{pc}
expands to %cursor%
Creating document in couchdb is generating the following error,
12> ADoc.
[{<<"Adress">>,<<"Hjalmar Brantingsgatan 7 C">>},
{<<"District">>,<<"Brämaregården">>},
{<<"Rent">>,3964},
{<<"Rooms">>,2},
{<<"Area">>,0}]
13> IDoc.
[{<<"Adress">>,<<"Segeparksgatan 2A">>},
{<<"District">>,<<"Kirseberg">>},
{<<"Rent">>,9701},
{<<"Rooms">>,3},
{<<"Area">>,83}]
14> erlang_couchdb:create_document({"127.0.0.1", 5984}, "proto_v1", IDoc).
{json,{struct,[{<<"ok">>,true},
{<<"id">>,<<"c6d96b5f923f50bfb9263638d4167b1e">>},
{<<"rev">>,<<"1-0d17a3416d50129328f632fd5cfa1d90">>}]}}
15> erlang_couchdb:create_document({"127.0.0.1", 5984}, "proto_v1", ADoc).
** exception exit: {ucs,{bad_utf8_character_code}}
in function xmerl_ucs:from_utf8/1 (xmerl_ucs.erl, line 185)
in call from mochijson2:json_encode_string/2 (/Users/admin/AlphaGroup/src/mochijson2.erl, line 200)
in call from mochijson2:'-json_encode_proplist/2-fun-0-'/3 (/Users/admin/AlphaGroup/src/mochijson2.erl, line 181)
in call from lists:foldl/3 (lists.erl, line 1197)
in call from mochijson2:json_encode_proplist/2 (/Users/admin/AlphaGroup/src/mochijson2.erl, line 184)
in call from erlang_couchdb:create_document/3 (/Users/admin/AlphaGroup/src/erlang_couchdb.erl, line 256)
Above of two documents one can be created in couchdb with no problem (IDoc).
can any one help me to figure out the reason it is caused?
I think that is problem is in the <<"Brämaregården">>. It is necessary to convert the unicode to binary firstly. Example is in the following links.
unicode discussion. The core function is in unicode
Entering non-ASCII characters in Erlang code is fiddly, not the least because it works differently in the shell than in compiled Erlang code.
Try inputting the binary explicitly as UTF-8:
<<"Br", 16#c3, 16#a4, "mareg", 16#c3, 16#a5, "rden">>
That is, "ä" is represented by the bytes C3 A4 in UTF-8, and "å" by C3 A5. There are many ways to find those codes; a quick search turned up this table.
Normally you'd get the input from somewhere outside your code, e.g. reading from a file, typed into a web form etc, and then you wouldn't have this problem.
I usually use Geany or Hi-Tide under Debian (GNU/Linux) for firmware development, mainly C (but also reading old assembler). I document code using single-line comments, and it really annoys me when I retype something and have to manually re-break every following line to keep it in the 80-character margin.
Is there a text editor that can re-wrap consecutive single-line comments (and do this automatically while I type)? That is, given:
/// This is a really long line that should have been wrapped at "that" but was not.
/// This sentence is in the same
/// paragraph as the last.
...I want an editor that will re-wrap this to
/// This is a really long line that
/// should have been wrapped at "that"
/// but was not. This sentence is in
/// the same paragraph as the last.
...preferably doing this sensibly while I type.
I've tried:
Hi-Tide (based on Eclipse 3.3)
Geany
jEdit
UniversalIndentGUI + a bunch of prettifiers (I couldn't find any formatters that worked, and it's not a great workflow either)
GVim - next line begins //should have been... instead of /// should have been...
Update: just to elaborate on my accepted answer - I've gone with the snapshot emacs and an extra filladapt mode was also required
In Emacs, to start automatic wrapping, enter auto-fill-mode. To set the line width, run C-u ⟨columns⟩ C-x f.
Emacs, or really CC Mode, will anticipate your commenting structure, so that typing
/// This is a really long line that shoul will result in
/// This is a really long line that
/// shoul‸
And you can refill a paragraph at any time with M-q.
If you want to do refills automatically with each keypress, well there may well be some interal command or third-party library out there, but off-hand you can use this elisp code:
;;; Can't advise SELF-INSERT-COMMAND, so create a wrapper procedure.
(defun self-insert-refill (n)
(interactive "p")
(self-insert-command n))
;;; Advise SELF-INSERT-REFILL to execute FILL-PARAGRAPH after every
;;; keypress, but *only* if we're inside a comment
(defadvice self-insert-refill (after refill-paragraph)
(let ((face (or (get-char-property (point) 'read-face-name)
(get-char-property (point) 'face))) )
(if (and (eq face 'font-lock-comment-face)
(not (string= " " (this-command-keys)))) ; Spaces would get deleted on refill.
(fill-paragraph))))
(ad-activate 'self-insert-refill)
(add-hook 'c-mode-hook
;; Remap SELF-INSERT-COMMAND to be SELF-INSERT-REFILL.
(local-set-key [remap self-insert-command] 'self-insert-refill) ))
This is probably not very robust or in keeping with best-practice, and likely not wholly satisfactory, as it won't work for general editing, e.g. C-d and backspace, and it slows down the editor somewhat, but it's a start.
Vim most certainly can do this.
First, you need to tell Vim that "///" is a comment prefix (it isn't by default):
:set comments^=:///
If you want wrapping to occur as-you-type, set your preferred textwidth:
:set textwidth=80
To format existing paragraphs, use any variation of the gq command. For example, you could:
Select a paragraph visually and type gq, or
Type gqj to re-wrap from the current line to the end of the paragraph
Given this line of code in C:
printf("%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32)));
Is there a way to delete or yank from the first bold parenthesis to its matching parenthesis? I thought about df), but that only will get you to just after the 9.0.
Is there a similar way to get vim to grab everything between matching braces, regardless of newlines?
What about dib or di(.
It will delete the inner (...) block where the cursor is.
I love text-object motions and selections!
Various Motions: %
The % command jumps to the match of the item under the cursor. Position the cursor on the opening (or closing) paren and use y% for yanking or d% for deleting everything from the cursor to the matching paren.
This works because % is a "motion command", so it can be used anywhere vim expects such a command. From :help y:
["x]y{motion} Yank {motion} text [into register x]. When no
characters are to be yanked (e.g., "y0" in column 1),
this is an error when 'cpoptions' includes the 'E'
flag.
By default, "item" includes brackets, braces, parens, C-style comments and various precompiler statements (#ifdef, etc.).
There is a plugin for "extended % matching" that you can find on the Vim homepage.
You can read the documentation on % and related motion commands by entering :help various-motions in command mode.
object-select
There is another set of motion commands that you can use in Visual mode to select various text objects.
To solve your specific problem you would do the following:
printf("%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32)));
^
Let's say your cursor is positioned at ^. Enter the following sequence to select the part you are looking for:
v2a)
First v enters Visual mode, then you specify that you want to go 2 levels of parens up. Finally the a) selects "a block". After that you can use d or x to delete, etc.
If you don't want to include the outer parens, you can use "inner block" instead:
v2i)
See :help object-select for the complete list of related commands.
To delete all that is inside a pair of parentheses, you can always issue di( and its derivatives.
Note :
As #porglezomb suggested in his comment, you can use a ("along with") instead of i ("inside") to include the parentheses. So, using da( deletes everything inside ( and ) including ( and ).
Deleting text inside the immediate outer pair of parentheses :
So, for this line of code
printf("%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32)));
^ ^
| |
\_______\___---> Cursor range
assuming that your cursor is inside the above mentioned cursor range, you can issue the following commands :
di( --> Deletes '5.0/9.0'
ci( --> Substitutes '5.0/9.0'
yi( --> Yanks '5.0/9.0'
Deleting text inside the n-th outer pair of parentheses :
To grab everything inside the n-th outer pair of parentheses, just add n before the above command. So, with the same cursor position as above,
2di( --> Deletes '(5.0/9.0) * (fahr-32)'
2ci( --> Substitutes '(5.0/9.0) * (fahr-32)'
2yi( --> Yanks '(5.0/9.0) * (fahr-32)'
3di( --> Deletes '"%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32))'
3ci( --> Substitutes '"%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32))'
3yi( --> Yanks '"%3.0f\t%6.1f\n", fahr, ((5.0/9.0) * (fahr-32))'
You can use d% for deleting and y% for yanking.
Place your cursor on the first parenthesis, then press v%y or v%d.
Try ci[block-surrounder]
In your case, place the cursor anywhere between the 2 parenthesis that you highlighed and try the keys: ci(
As answer of David Norman says,
Place your cursor on the first parenthesis, then press v%y or v%d.
Explanation from http://vimdoc.sourceforge.net/htmldoc/vimindex.html:
tag char note action in Normal mode
------------------------------------------------------------------------------
|v| v start characterwise Visual mode
|%| % 1 find the next (curly/square) bracket on
this line and go to its match, or go to
matching comment bracket, or go to matching
|d| ["x]d{motion} 2 delete Nmove text [into buffer x]
This means it will select everything between and including the two brackets (%) while showing the selection to you visually (v) and then yank/copy y or delete/cut d it. (To the default buffer.)
You can put/paste with p.
Made this answer to "teach myself to fish".