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QUESTION
I am trying to show list of messages with different types of ViewHolders i.e. Text, ImageText, Video etc. I get a list of these objects from API somewhat in this format:
...ANSWER
Answered 2021-Jun-03 at 06:35I might be understanding you wrong, but I would like to suggest a different approach. I am assuming you would like to assign to get a ViewHolder type directly from what you get in your API response.
There are two approaches I would like to suggest:
- First, if it is possible to get the API response modified, I would suggest to change
viewHolderType
from a String to an Int so as you can be clear with your mapping and then you can directly compare it. - Second what I would suggest is to keep another key in your data class which sets value as per the
viewHolderType
it receives which would be something of as follows.
QUESTION
I am running an SQL query to extract nested JSON data.
...ANSWER
Answered 2020-Oct-26 at 17:46If I am following this correctly, one level of unnesting is sufficient. You can then use the JSON accessors to get the results you want:
QUESTION
I would like to modify the behavior of leaflet grouping feature to total on grouping and preserve a round red bubble shape dependent on value.
My data contains columns:
lon lat sales_ytd
I would like to cluster data depending on zoom using clusterOptions = markerClusterOptions(iconCreateFunction=JS(sum.formula))
Here is my function. I do not know JS but I tried numerous examples and the function works by summing up the grouped values.
...ANSWER
Answered 2020-Feb-19 at 22:12For total number of markers/layers you can use the getLayers() function which will return an array of all the component layers of that cluster.
QUESTION
I have a data frame with a binary variable and xy coordinates. I can map the data with Leaflet and vary the color of the markers for each variable, but I want to know if I can also vary the label color.
Below is an example of the data. Right now I can only make the labels one color (e.g., black). In this example, I'd like labels for electronics to be blue font and labels for non-electronics to be red font.
...ANSWER
Answered 2019-Sep-25 at 18:53You need to do a little workaround by replace the label with HTML.
In addLabelOnlyMarkers()
function, repalce label = as.character(data$Name)
with following codes:
QUESTION
I have an asynchronous function that uploads files to firebase storage. I am trying to return the download url retrieved for each file through a list of string. However, the problem I am having is that the function execute the return
line before the asynchronous operation is done.
My code looks like this:
...ANSWER
Answered 2020-Jan-20 at 21:38Avoid the use of forEach
. In this case, you are creating closures that will each finish after the forEach
loop.
Instead, use a normal for
loop, so that each will complete in turn.
QUESTION
I want to concatenate a string in a long(ish) HEREDOC block.
I am making a very quick and dirty form builder just to use to enter dummy data in the database. I have $var.Help
in the text block:
ANSWER
Answered 2019-Oct-29 at 13:12{$var}Help
should do the trick. You delimit your var with the {
and just add the string at the point it needs to be
QUESTION
I would like to have two distincts actions in a Shiny Leaflet object, depending on if there is a right click or a left click on a polygon.
I have two polygons initialized with a value of 1. I would like to incremente the value of +1 when the user does a left click on the polygon, and decremente the value of -1 when the user does a right click. If the right click is not possible in R Shiny, it could be a double left click. The goal here is to detect two different clicks on a polygon, in order to have two differents actions after.
There is a reproductible example of what I am doing : the left click is doing well, the value of the polygon is incrementing on left click. Now I would like to make the commented code working, for the decrementation on right click.
...ANSWER
Answered 2019-Aug-21 at 12:33I finally found a way to do it, maybe not the best because I am not used to Javascript ...
QUESTION
I am trying to create a high-quality map of a small part of the UK, without any distortions caused by the use of projections, and with the addition of markers consisting of text and symbols. Ultimately the goal is to write out a png or pdf file. An earlier, related question can be found here.
Having not used R in anger for several years, I have been wading through a morass of packages trying to find something suitable. Leaflet for R is promising, but although I can create a decent-looking map, add markers, and vary the colour of markers and so on using columns from a data frame, I have not been able to vary the size, colour, and text offsets used in the labelOptions
argument.
The following reproducible example shows what I can achieve, and also where I am not succeeding. I would like the size of text label to vary according to the df.data$textsizes
column. Given that the style
argument takes a list of value pairs, that would seem difficult, and nothing has worked so far.
If am hoping that somebody can either suggest either a way to bend the wily labelOptions
to my will, or a completely different approach to try.
ANSWER
Answered 2019-Aug-02 at 20:49 df.entrynames <- c("Entry 1: Some text","Entry 2: More text")
df.lat <- c(51.509898,51.510736)
df.lon <- c(-0.1345093,-0.135190)
df.colors <-c("Blue","Red")
df.sizes <-c(36,2)
df.data <- data.frame(entrynames=df.entrynames,lat=df.lat,lon=df.lon,colors=df.colors,textsizes=df.sizes)
df.data$entrynames <- as.character(df.data$entrynames)
df.data$colors <- as.character(df.data$colors)
df.data$textsizes <- paste(df.data$textsizes,"px",sep="")
#Add a vector to split the data by
df.data$place<-seq(1:nrow(df.data))
library(purrr)
#split the data
ob_place <- df.data %>%
split(., .$place)
#make a map
m <- leaflet() %>%
addTiles()
#Add layers
names(ob_place) %>%
purrr::walk(function(df.data) {
m<<-m %>% #seems like there's supposed to be two carrots here, i had problems without one
addCircleMarkers(data=ob_place[[df.data]],fillColor=~colors,
fillOpacity = 0.6,
weight=1,
radius=13,
color="white",
opacity = .6,
lng=~lon, lat=~lat,
group = "Show All",
label = ~entrynames,
labelOptions = labelOptions(noHide = T,
#direction = ~MyDirection, #https://rstudio.github.io/leaflet/popups.html
textsize = ~textsizes,
#opacity=~opacity,
style = list(
"color"="black",
"font-family" ="sans-serif",
"box-shadow" = "3px 3px rgba(0,0,0,0.25)",
#"font-size" = "12px",
"border-color" = "rgba(0,0,0,0.5)"
)))
})
m
QUESTION
I am migrating an electron app into a web-browser app and I have come across some scss styling I have never seen before. Most of the selector use an At-Rule that does not make any sense.
It seems to generate class names but I am struggling to understand whether is a SASS features or some other library\package.
all these @b, @m don't make any sense to me.
I have googled but could not find better info neither on SCSS docs.
...ANSWER
Answered 2019-Jun-21 at 14:45Thanks to the help of another developer I was able to figure out that this syntax is part of the package: https://www.npmjs.com/package/postcss-atrule-bem
Using the same SASS nesting adopted by the npm package, you can find and replace in your IDE the @b block with .block, @e element with &__element and @m modifier with &--modifier.
QUESTION
I am using jQuery 1.4.5 on my page and use the loader ahead of an ajax request:
...ANSWER
Answered 2019-Apr-04 at 16:32You can remove the needed element with the jQuery remove
method.
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