I'd like to format the document: give it indentation and stuff like that.
Ctrl K + Ctrl D/F in Visual Studio doesn't work for F#, does anybody have any workaround for that? It does work for C# though...
EDIT: What I'd like to do is to copy-paste some code from an external source. I usually use Ctrl K + Ctrl D to format it, and it works for C#. However, in an .fs file, it doesn't seem to work. On top of that, indentation seems to be pretty much a must-have for F#...
F# is indentation sensitive, so if you copy valid code from one location to another, the only thing that you might need to do is to make sure it has the right offset from the left side. For example, say you have:
let test () =
printfn "Hello world" // (*)
let another () =
for i in 0 .. 10 do
test() // (#)
printfn "finished"
Now, if you wanted to copy the line (*) and use it instead of a call to test, just Copy & Paste would turn your code into the following:
let another () =
for i in 0 .. 10 do
printfn "Hello world" // (*)
printfn "finished"
This has a different meaning though! It repeates both of the printfn lines 10 times. So, instead what you would want to get is this:
let another () =
for i in 0 .. 10 do
printfn "Hello world" // (*)
printfn "finished"
The way to do Copy & Paste in Visual Studio to keep the same meaning of code is to paste the copied code as usual (Ctrl+V) and then, while the code is still selected, correct the indentation. To indent the code further use Tab and to indent it less far use Shift+Tab.
This way, you can use Copy and Paste for F# code just fine. You do not need to reformat the entire block, because valid F# code copied to another place will automatically be well formatted. You just need to fix the indentation.
Regarding the #light mode mentioned in comments - in earlier versions of F#, it was possible to use additional keywords and semicolons instead of indentation-sensitive mode. The modern indentation-sensitive style was called #light, but it is now default and you do not need to worry about the legacy style.
Seems like the only answer is to use one of these:
https://github.com/dungpa/fantomas
http://visualstudiogallery.msdn.microsoft.com/24ef5c87-b4e3-4c3b-b126-1064cc66e148
https://github.com/tpetricek/FSharp.Formatting
handles spaces and such
Related
I frequently run into problems that could be solved with automating code writing, but aren't long enough to justify it as tediously entering each piece is faster.
Here is an example:
Putting lists into dictionaries and things like this. Converting A into B.
A
hotdog HD
hamburger HB
hat H
B
def symbolizeType
case self.type
when "hotdog"
return "HD"
when "hamburger"
return "HB"
when "hat"
return "H"
end
Sure I could come up with something to do this automatically, but it would only make sense if the list was 100+ items long. For a list of 10-20 items, is there a better solution than tediously typing? This is a Ruby example, but I typically run into cases like this all the time. Instead of a case statement, maybe it's a dictionary, maybe it's a list, etc.
My current solution is a python template with the streaming input and output already in place, and I just have to write the parsing and output code. This is pretty good, but is there better? I feel like this would be something VIM macro would excel at, but I'm that experienced with VIM. Can VIM do this easily?
For vim, it'd be a macro running over a list of space separated pairs of words, inserting the first 'when "' bit, the long form word 'hotdog', the ending quote, a newline and 'return "', and then the abbreviation and then final quote, then going back to the list and repeating.
Starting with a register w of:
when "
register r of:
return "
an initial list of:
hotdog HD
hamburger HB
hat H
and a starting file of:
def symbolizeType
case self.type
"newline here"
you can use the following macro at the start of the initial list:
^"ayeeeb"byeo"wp"apa"^Mrb"j
where ^M is a newline.
I do this frequently, and I use a single register and a macro, so I'll share.
Simply pick a register, record your keystrokes, and then replay your keystrokes from the register.
This is a long explanation, but the process is extremely simple and intuitive.
Here are the steps that I would take:
A. The starting text
hotdog HD
hamburger HB
hat H
B. Insert the initial, non-repetitive lines preceding the text to transform
def symbolizeType
case self.type
hotdog HD
hamburger HB
hat H
C. Transform the first line, while recording your keystrokes in a macro
This step I'll write out in detailed sub-steps.
Place the cursor on the first line to transform ("hotdog") and type qa to begin recording your keystrokes as a macro into register a.
Type ^ to move the cursor to the start of the line
Type like you normally would to transform the line to what you want, which for me comes out looking like the following macro
^i^Iwhen "^[ea"^[ldwi^M^Ireturn "^[ea"^[j
Where ^I is Tab, ^[ is Esc, and ^M is Enter.
After the line is transformed to your liking, move your cursor to the next line that you want to transform. You can see this in the macro above with the final j at the end.
This will allow you to automatically repeat the macro while it cycles through each repetitive line.
Stop recording the macro by typing q again.
You can then replay the macro from register a as many times as you like using a standard vim count prefix, in this case two consecutive times starting from the next line to transform.
2#a
This gives the following text
def symbolizeType
case self.type
when "hotdog"
return "HD"
when "hamburger"
return "HB"
when "hat"
return "H"
D. Finally, insert the ending non-repetitive text
def symbolizeType
case self.type
when "hotdog"
return "HD"
when "hamburger"
return "HB"
when "hat"
return "H"
end
Final Comments
This works very quick for any random, repetitive text, and I find it very fluent.
Simply pick a register, record your keystrokes, and then replay your keystrokes from the register.
For things like this I have a few ways of making it easier. One is to use an editor like Sublime Text that allows you to multi-edit a number of things at once, so you can throw in markup with a few keystrokes and convert that into a Hash like:
NAME_TO_CODE = {
hotdog: 'HD',
hamburger: 'HB',
hat: 'H'
}
Not really a whole lot changed there. Your function looks like:
def symbolize_type(type)
NAME_TO_CODE[type.to_sym]
end
Defining this as a data structure has the bonus of being able to manipulate it:
CODE_TO_NAME = NAME_TO_CODE.invert
Now you can do this:
def unsymbolize_type(symbol)
CODE_TO_NAME[symbol.to_s]
end
You can also get super lazy and just parse it on the fly:
NAME_TO_CODE = Hash[%w[
hotdog HD
hamburger HB
hat H
].each_slice(2).to_a]
snippets are like the built-in :abbreviate on steroids, usually with parameter insertions, mirroring, and multiple stops inside them. One of the first, very famous (and still widely used) Vim plugins is snipMate (inspired by the TextMate editor); unfortunately, it's not maintained any more; though there is a fork. A modern alternative (that requires Python though) is UltiSnips. There are more, see this list on the Vim Tips Wiki.
There are three things to evaluate: First, the features of the snippet engine itself, second, the quality and breadth of snippets provided by the author or others; third, how easy it is to add new snippets.
I wrote some code and tried the Ctrl + T to check transpose feature in visual studio.
Just to check if CTRL + Shift + T does the reverse for this Transpose... I tried pressing Ctrl + Shift + T.
and it just messed up everything...
Can anyone tell me what exactly this Ctrl + Shift + T does (especially with a block) ?
For instance:
public string returnDateTimeToMyformat(DateTime dt)
{
dt = dt.AddYears(-1);
return dt.ToString("yyyy MM dd HH mm ss");
}
To:
string returnDateTimeToMyformat publicdtDateTime (dt
{
dt = )1AddYears(-.return;
dt ).ToString("yyyy MM dd HH mm ss");
}
(I started with my cursor right after 'public')
Since CTRL-T swaps the two characters on either side of the cursor, the opposite of it is ...
wait for it ...
CTRL-T
:-)
CTRLSHIFTT transposes the two words after the cursor.
What it's doing to your block seems rather bizarre. It appears to doing it to multiple parts of each line. My only advice would be (as the doctor said to the patient who complained it hurts when banging their head against a wall): Don't do that.
As others have pointed out, the two words following the cursor are transposed, and the cursor is placed after the words that have been transposed. However, Visual Studio 2010 at least appears to ignore commas and other punctuation when considering "words." One utility of this, then, is that you can reorder something like an enum. For instance,
typedef enum myEnum
{
ThingOne,
ThingThree,
ThingTwo
};
Put the cursor somewhere near ThingThree and press CtrlShiftT to get:
typedef enum myEnum
{
ThingOne,
ThingTwo,
ThingThree
};
This could be a good thing if you decide that a different order for your enums is better. You can also use this to help idiot-proof comparisons and/or quickly and easily format them to a better coding standard.
if ( ptr == NULL ) { /* stuff */ }
is considered bad (never mind that having an "if" on its own line is also bad) since you could easily write (or read) "ptr = NULL" by accident. You're better off with
if ( NULL == ptr ) { /* stuff */ }
So, if you did it wrong the first time, just select the offending expression and...CtrlShiftT to the rescue!
...Yeah, okay, so this thing isn't that useful.
Edit: Hmm, I should add that the behavior is a little weirder when your cursor is placed immediately before a punctuation symbol (such as a left-parenthesis), hence the weird result you got when you repeatedly hit CtrlShiftT on your code snippet. It seems to just swap any whitespace-terminated string after the cursor with the next alphanumeric "word," skipping over any punctuation symbols in between. The result is often difficult to read, though, so I'm not going to claim that's the exact pattern.
According to this website:
Transposes the two words that follow
the cursor. (For example, |End Sub
would be changed to read Sub End|.)
The only question that remains is probably: WHY??
Well it might become handy when you have a block of code lines where variables are assigned values. (For example Load/Save) In the opposite function, you want to do the opposite assignment, maybe this shortcut can be used in such a situation...
With this Visual Studio Document Reopen cool extension CTRL+SHIFT+T you can reopen the last closed document(s). It works like in Web browsers.
I recently dived into LaTeX, starting with the help of a WYSIWYM editor like Lix. Now I'm staring writing tex files in Sci-TE, It already has syntax higlighting and I adapted the tex.properties file to work in Windows showing a preview on Go [F5]
One pretty thing Lyx does, and it's hard to acheive with a common text editor, is to format text in 80 columns: I can write a paragraph and hit Return each time I reach near the edge column but if, after the first draft, I want to add or cut some words here and there I end up breaking the layout and having to rearrange newlines.
It would be useful to have a tool in Sci-TE so I can select a paragraph of text I added or deleted some words in and have it rearranged in 80 columns. Probably not something working on the whole document since it could probably break some intended anticipated line break.
Probably I could easily write a Python plugin for geany, I saw vim has something similar, but I'd like to know if its' possible in Sci-TE too.
I was a bit disappointed when I found no answer as I was searching for same. No helpers by Google either, so I searched for Lua examples and syntax in a hope to craft it myself. I don't know Lua so this can perhaps be made differently or efficiently but its better then nothing I hope - here is Lua function which needs to be put in SciTE start-up Lua script:
function wrap_text()
local border = 80
local t = {}
local pos = editor.SelectionStart
local sel = editor:GetSelText()
if #sel == 0 then return end
local para = {}
local function helper(line) table.insert(para, line) return "" end
helper((sel:gsub("(.-)\r?\n", helper)))
for k, v in pairs(para) do
line = ""
for token in string.gmatch(v, "[^%s]+") do
if string.len(token .. line) >= border then
t[#t + 1] = line
line = token .. " "
else
line = line .. token .. " "
end
end
t[#t + 1] = line:gsub("%s$", "")
end
editor:ReplaceSel(table.concat(t, "\n"))
editor:GotoPos(pos)
end
Usage is like any other function from start-up script, but for completness I'll paste my tool definition from SciTE properties file:
command.name.8.*=Wrap Text
command.mode.8.*=subsystem:lua,savebefore:no,groupundo
command.8.*=wrap_text
command.replace.selection.8.*=2
It does respect paragraphs, so it can be used on broader selection, not just one paragraph.
This is one way to do it in scite: first, add this to your .SciTEUser.properties (Options/Open User Options file):
# Column guide, indicates long lines (https://wiki.archlinux.org/index.php/SciTE)
# this is what they call "margin line" in gedit (at right),
# in scite, "margin" is the area on left for line numbers
edge.mode=1
edge.column=80
... and save, so you can see a line at 80 characters.
Then scale the scite window, so the text you see is wrapped at the line.
Finally, select the long line text which is to be broken into lines, and do Edit / Paragraph / Split (for me the shortcut Ctrl-K also works for that).
Unfortunately, there seems to be no "break-lines-as-you-type" facility in scite, like the "Line Breaking" facility in geany. not anymore, now there's a plugin - see this answer
Well, I was rather disappointed that there seems to be no "break-lines-as-you-type" facility in scite; and I finally managed to code a small Lua plugin/add-on/extension for that, and released it here:
lua-users wiki: Scite Line Break
Installation and usage instructions are in the script itself. Here is how SciTE may look when the extension properly installed, and toggle activated after startup:
Note that it's pretty much the same functionality as in geany - it inserts linebreaks upon typing text - but not on pressing backspace, nor upon copy/pasting.
the same but more easy, I think...
put this in the user properties:
command.name.0.*=swrap
command.0.*=fold -s $(FileNameExt) > /tmp/scite_temp ; cat /tmp/scite_temp >$(FileNameExt)
command.is.filter.0.*=1
Ciao
Pietro
I have a common issue when working with code in the IDE:
string.Concat("foo", "bar");
and I need to change it to:
string.Concat("bar", "foo");
Often I have several of these that need to be swapped at once. I would like to avoid all the typing. Is there a way to automate this? Either a shortcut or some sort of macro would be great if I knew where to start.
Edit: changed to string.Concat to show that you can't always modify the method signature. I am only looking to change the order of the params in the method call, and nothing else.
<Ctrl> + <Shift> + <t> will transpose two words, so it would work in your case. Unfortunately I don't see this working (without multiple presses) for functions with larger parameter lists...
I had a lot of code with this function:
SetInt(comboBox1.Value + 1, "paramName", ...
SetInt(comboBoxOther.Value, "paramName", ...
And I needed to swap only the first two parameters;
I ended up using some text editor with regular expression management (like Scite), and using this one saved me hours:
Find: SetInt(\([.a-z0-9]+[ + 1]*\), \("[a-z0-9]+"\)
Replace: SetInt(\2, \1
This question already has answers here:
How can I reverse code around an equal sign in Visual Studio?
(6 answers)
Closed 4 years ago.
I have a bunch of assignment operations in Visual Studio, and I want to reverse them:
i.e
i = j;
would become
j = i;
i.e. replacing everything before the equals with what's after the equals, and vice versa
Is there any easy way to do this, say something in the regular expression engine?
Select the lines you want to swap, Ctrl+H, then replace:
{:i}:b*=:b*{:i};
with:
\2 = \1;
with "Look in:" set to "Selection"
That only handles C/C++ style identifiers, though (via the ":i"). Replace that with:
{.*}:b*=:b*{.*};
to replace anything on either side of the "=".
Also, since you mentioned in a comment you use ReSharper, you can just highlight the "=", Alt+Enter, and "Reverse assignment".
Just a slight improvement on Chris's answer...
Ctrl+H, then replace:
{:b*}{[^:b]*}:b*=:b*{[^:b]*}:b*;
with:
\1\3 = \2;
(better handling of whitespace, esp. at beginning of line)
EDIT:
For Visual Studio 2012 and higher (I tried it on 2015):
Replace
(\s*)([^\s]+)\s*=\s*([^\s]+)\s*;
with:
$1$3 = $2;
In Visual Studio 2015+ after selecting code block press Ctrl + H (Find & Replace window) and check "Use Regular Expression" option, then:
Find: (\w+.\w+) = (\w+);
Replace: $2 = $1;
For example:
entity.CreateDate = CreateDate;
changes to:
CreateDate = entity.CreateDate;
Thank you #Nagesh and Revious, mentioned details added.
The robust way to do this is to use a refactoring tool. They know the syntax of the language, so they understand the concept of "assignment statement" and can correctly select the entire expression on either side of the assignment operator rather than be limited to a single identifier, which is what I think all the regular expressions so far have covered. Refactoring tools treat your code as structured code instead of just text. I found mention two Visual Studio add-ins that can do it:
ReSharper
MZ-Tools
(Inverting assignment isn't technically refactoring since it changes the behavior of the program, but most refactoring tools extend the meaning to include other generic code modifications like that.)
Please see this question: Is there a method to swap the left and right hand sides of a set of expressions in Visual Studio?
My answer to that question has a macro that you can use to swap the assignments for a block of code.
I've improved the expression a little.
Replace
(\t+)(\s*)(\S*) = (\S*);
with
$1$2$4 = $3;
The reason is, it will look for lines starting with tab (\t). It will skip the lines starting with definition. E.g.:
TestClass tc = new TestClass();
int a = 75;
int b = 76;
int c = 77;
a = tc.a;
b = tc.b;
a = tc.c;
Would ignore the int a, int b and int c and swap only the assignments.
what about replace all (CTRL-H)
you can replace for example "i = j;" by "j = i;"
you can use regular expressions in that dialog. I'm not so sure about how you should pop-up help about them however. In that dialog, press F1, then search that page for more information on regular expressions.
I like this dialog because it allows you to go through each replacement. Because the chance of breaking something is high, I think this is a more secure solution
You can do search and replace with regular expressions in Visual Studio, but it would be safer to just do a normal search and replace for each assignment you want to change rather than a bulk change.
Unfortunatly I don't have Visual Studio, so I can't try in the target environment, but if it uses standard regexps, you could probably do it like this:
Search for "(:Al) = (:Al);", and replace with "\2 = \1". (\1 and \2 are references to the first and second capture groups, in this case the parenthesises around the \w:s)
EDIT
Ok, not \w... But according to MSDN, we can instead use :Al. Edited above to use that instead.
Also, from the MSDN page I gather that it should work, as the references seem to work as usual.