I'm writing some folding functions and I am at a point where I need to check if the current line is actually a fold.
The reason for this is because it is a custom fold method that depends on searching/matching certain lines.
For example, if the current line is folded and looks like:
-FOO------------------------
If you do something like:
getline('.')
You would basically get FOO so there is no way (that I know of) to know if I am at a fold or not.
Is there a helper function for this?
I would think it would have to be something like:
is_folded('.')
I could probably mess with the foldtext to assign a special title for the fold but I want to avoid this.
From :help eval.txt
foldclosed({lnum})
The result is a Number. If the line {lnum} is in a closed
fold, the result is the number of the first line in that fold.
If the line {lnum} is not in a closed fold, -1 is returned.
You can check for a given line if it returns -1 or a line number, you can probably implement your isfolded() function this way.
If you are looking for Vim script function or feature , it is a good idea to start by searching in eval.txt which contains lots of relevant information.
Related
Let's say I have some page which can take two parameters, x and y. I often find myself doing things in that page like in this silly little example:
{{#if: {{{x|{{{y|}}}}}} | '''{{{x|{{{y|}}}}}}'''. I repeat, {{{x|{{{y|}}}}}}.}}
In many cases, I would greatly prefer to simplify the reuse of {{{x|{{{y|}}}}}}, for clarity, for ease of typing, and for making it more difficult to miss or to screw up. So, I'd like to do something like the following hypothetical syntax:
{{#set:z|{{{x|{{{y|}}}}}}}}
{{#if: {{{z|}}} | '''{{{z}}}'''. I repeat, {{{z}}}.}}
That is, make a new parameter, z, which was not passed to the page, but nonetheless can be used in the page. Is there a way to do something like this?
There is the extension Variables, but it assumes a certain order of parsing, which will not be the case when pages are parsed with Parsoid.
To guarantee the right order of parsing you can use Lua.
But the simplest way will be to create a new template, taking only one parameter and to call it from the original one.
Template1:
{{template2| z = {{{x|{{{y|}}}}}} }}
Template2:
{{#if: {{{z}}} | '''{{{z}}}'''. I repeat, {{{z}}}.}}
//#version=5
tspy = 60
blue = color.new(color.blue,tspy)
now when this following code executes many lines below/later:
tspy := 0
plot(rsi, title='bullish', color=blue)
As would be expected this does not change the transparency of variable blue by itself, obviously I can put blue := color.new(color.blue,0), but that is not ideal.
Is there a type of variable that is dynamic and will update itself whenever a variable contained within it changes, rather than having to manually re-execute the variables expression?
I have also tried setting the colours into a "function" call, but this seems to get complicated and causes more problems and code than just reentering/duplicating the original code. This may seem trivial, but it has a much wider importance and use case in more complex coding than this particular example.
Why not use a function?
//#version=5
indicator("My Script")
get_color(transp) => color.new(color.blue, transp)
plot(series=1, color=get_color(100))
plot(series=2, color=get_color(80))
plot(series=3, color=get_color(60))
plot(series=4, color=get_color(40))
plot(series=5, color=get_color(20))
I have the object TABLE_LIST which is a list that has tables (I can't provide the contents for privacy policies, sorry).
I first created the object TABLE_LIST (It is a list of data.frames 2x12)
TABLE_LIST=lapply(1:4, function(x) data.frame(rbind(total.ratio4[[x]][-(1)], total.ratio2[[x]][-(1)]), row.names=row))
The following code gives me red and green font colors based on the value on the cell, and it works like a charm:
formattable(TABLE_LIST[[1]], list(area(,-(c(5,10)))~formatter("span", style=x~style(color=ifelse(x>1,"red","green"))),area(,(c(5,10)))~formatter("span", style=x~style(color=ifelse(x>1,"green","red")))))
However, I need COLOR AND comma separated numbers. My failed attempt is:
formattable(TABLE_LIST[[1]], list(area(,-(c(5,10)))~formatter("span", style=x~style(color=ifelse(x>1,"red","green"))),area(,(c(5,10)))~formatter("span", style=x~style(color=ifelse(x>1,"green","red"),digits(x,2))),
area(1:2,1:10)~formatter("span",x~ style(digits(x,2)))))
This code works well, but erases the formatting of the color. I do not know what else to do.
I have to mention I cannot change the original data.frame without messing everything up. So I gotta make the changes on table_list or formattable. Thank you.
I think I solved it. So I will share this small knowledge to people who may have the same problems as me:
formattable(TABLE_LIST[[1]],
list(
area(,-(c(5,10)))~formatter("span",
style=x~style(color=ifelse(x>1,"red","green")),
x~style(digits(x,4))),
area(,(c(5,10)))~formatter("span",
style=x~style(color=ifelse(x>1,"green","red")),
x~style(digits(x,4)))))
Basically, inside the same formatter, on the level of style, add a comma and x~style.
We are using the following code (generated by php but finally this is on client side)
c3.generate({'bindto':'#b65d3422__salestaffcommunication_xepan_base_view_chart_chart','data':{'keys':{'x':'name','value':['Email','Call','Meeting']},'groups':[['Email','Call','Meeting']],'json':[],'type':'bar'},'axis':{'x':{'type':'category'},'rotated':true},'onrendered':function(ev,ui){$(".widget-grid").masonry({'itemSelector':'.widget'})}});
c3.generate({'bindto':'#f67e14d8__t_masscommunication_xepan_base_view_chart_chart','data':{'keys':{'x':'name','value':['Newsletter','TeleMarketing']},'groups':[['Newsletter','TeleMarketing']],'json':[],'type':'bar'},'axis':{'x':{'type':'category'},'rotated':true},'onrendered':function(ev,ui){$(".widget-grid").masonry({'itemSelector':'.widget'})}});
c3.generate({'bindto':'#517df254__ableworkforce_xepan_base_view_chart_chart','data':{'columns':[['present',11.111111111111]],'type':'gauge'},'color':{'pattern':['#FF0000','#F97600','#F6C600','#60B044'],'threshold':{'values':[30,60,90,100]}},'onrendered':function(ev,ui){$(".widget-grid").masonry({'itemSelector':'.widget'})}});
And last graph is not drawn. showing
SyntaxError (DOM Exception 12): The string did not match the expected pattern.
However, I can run ANY two and it works fine. that means all code is perfect but once second one is drawn ( no matter in which order). Third one doesn't draws.
Is it any known bug, or any workaround known.
Using v0.4.11 of c3 from c3js.org
Here is my jsfiddle
https://jsfiddle.net/2yy2mjaf/1/
Thank you.
IDs cannot start with a number, which is the case of your third ID.
The simple solution is just adding a letter to it:
'bindto':'#a517df254_ //just put an "a" before the number here
Here is your fiddle: https://jsfiddle.net/7dkLdg32/
I've been trying Vim for any text editing work for almost a week now. I want to know the fastest way to select a C function definition.
For example, if I have a function like this:
void helloworlds( int num )
{
int n;
for ( n = 0; n < num; ++n ) {
printf( "Hello World!\n" );
}
}
How would I be able to delete the whole definition including the function name?
As is common in Vim, there are a bunch of ways!
Note that the first two solutions depend on an absence of blank lines.
If your cursor is on the line with the function name, try d}. It will delete everything to the next block (i.e. your function body).
Within the function body itself, dap will delete the 'paragraph'.
You can delete a curly brace block with da}. (If you like this syntax, I recommend Tim Pope's fantastic surround.vim, which adds more features with a similar feel).
You could also try using regular expressions to delete until the next far left-indented closing curly brace: d/^}Enter
]] and [[ move to the next/previous first-column curly brace (equivalent to using / and ? with that regex I mentioned above. Combine with the d motion, and you acheive the same effect. In addons like Python-mode, these operators are redefined to mean exactly what you're looking for: move from function to function.
How to delete the whole block, header included
If you're on the header/name, or the line before the block, da} should do the trick.
If you're below a block, you can also make use of the handy 'offset' feature of a Vim search. d?^{?-1 will delete backwards to one line before the first occurrence of a first-column opening curly brace. This command's a bit tricky to type. Maybe you could make a <leader> shortcut out of it.
Plugins
I don't do much C programming in Vim, but there are surely plugins to help with such a thing. Try Vim Scripts or their mirror at GitHub.
To delete an entire function, including its definition, such as:
function tick() {
// ...
}
Move to the line with the function name.
Move the cursor to the opening brace, f{ should do it, or simply $.
Press V%d (Visual line, move to matching pair, delete)
If your functions look like this:
function tick()
{
// ...
}
Move to the line with the function name.
Press J (join the current line with line bellow. This also puts your cursor at the last character on the resulting line, {, just the one we need for the next command.)
Press V%d (Visual line, move to matching pair, delete.)
or
Move to the line with the function name.
Press V[Down]%d (Visual line, move one line down, move to matching pair, delete.)
If you are willing to install plugins vim-textobj-function will give you vif for Visual select Inside Function and vaf for Visual select A Function.
daf will delete the function, both the line with the signature and the function body ({})
The text object defined by this plugin are more specific and they don't rely on the function body being a contiguous block of text or { being placed at the first character on the line.
The drawback is that you depend on an external plugin.
You can use this shortcut to delete not only the function, also the lines between curly braces, i.e the code between if-else statements,while,for loops ,etc.
Press Shitf + v [Will get you in visual Mode] at the curly brace start/end.
Then Press ] + } i.e ] + Shitf ] - If you are in start brace.
Then Press [ + { i.e [ + Shitf [ - If you are in end brace.
Then DEL to delete the lines selected.
The simplest and most direct way way is as follows (works anywhere inside function):
v enter visual mode
{ move to first brace in function (may have to press more than once)
o exchange cursor from top to bottom of selection
} extend selection to bottom of function
d delete selected text
The complete command sequence would be v{o}d. Note that you can do other operations besides delete the same way. For example, to copy the function, use y (yank) instead of d.
Use this simple way
1.Go to the function definition
2.dd - delete function definition
3.d -start delete operation
4.shift+5(%) - delete the lines between { to }
If your function were separated by the blank lines, just type:
dip
which means "delete inner paragraph".
Another way is to go to the line of the start of your function and hit: Vj% (or V%% if your style puts the opening brace on the same line). This puts you into Visual-Line mode and the percent takes you to the matching closing brace. In the second style, the first % takes you to the opening brace on the line that you selected and the second to its matching closing brace.
Also works for parentheses, brackets, C-style multi-line comments and preprocessor directives.
See the manual for more info.
Pre-condition: be somewhere inside the function.
Go to the previous closing curly bracket on the first line using
[]
Then delete down to the next closing curly bracket on the first line using
d][
Most posted methods have a downside or two. Usually, when working withing a class definition of some object oriented language, you might not have an empty line after the function body, because many code formatters put the closing braces of last method and class on consecutive lines. Also, you might have annotations on top of the function. To make matters worse, there might be empty lines within your function body. Additionally you'd prefer a method that works with the cursor anywhere within the function, because having to move it to a specific line or worse, character, takes valuable time. Imagine something like
public class Test {
/* ... */
#Test
public void testStuff() {
// given
doSetup();
// when
doSomething();
// then
assertSomething();
}
}
In this scenario, vap won't do you any good, since it stops at the first empty line within your function. v{o} is out for the same reason. va{V is better but doesn't catch the annotation on top of the method. So what I would do in the most general case is va{o{. va{ selects the whole function body (caveat: if your cursor is within a nested block, for instance an inner if statement, then you'll only get that block), o puts the cursor to the beginning of the selection and { selects the whole paragraph prepending your selection. This means you'll get the function definition, all annotations and doc comments.
the most easy way I found is:
Get to the line where the function starts and do this: ^^vf{% to mark the entire function and then whatever you like.
^^ - start of the line
v - start visual mode
f - jump to the next search character
{ - this is the search character
% - jump to the closing brackets
This is also very logical after you have used it a few times.
non-visual way:
d/^}/e
... delete by searching for } at line beining, including it for deletion.
without /e (not mentioned in above answers), solution is incomplete.
with /e - searching goes to end of match, so closing bracket is included, and command is well for yanking too:
y/^}/e
if you use neovim version :>0.5
the modern way is to use treesitter and build your model, then you can be selected or yanked or deleted...
Tree-sitter is a parser generator tool and an incremental parsing library. It can build a concrete syntax tree for a source file and efficiently update the syntax tree as the source file is edited
I suggested this video on youtube to learn how to use treesitter to build your model : Let's create a Neovim plugin using Treesitter and Lua
I tried all the top answers here, but none of them works except the one by Nick which suggests to press f{ to get to the opening curly brace. Then V%d to delete the whole function.
Note that, the whole function gets yanked, so you can paste it elsewhere. I come across this use-case frequently, especially when moving if blocks inside another.
I use this map. It work for me
"delete function definition
"only support function body surround by {}
nnoremap <LEADER>df {v/{<cr>%d