repr

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Table misalignment when there is a value with an ampersand

1

(Originally posted in https://github.com/IRkernel/IRkernel/issues/447.) With R backend `data.frame(letter=c("A", "B&C", "D"), number=c(1000,2,30))` Displays something like this: | letter | value | |--------|-------| | A | 1000 | | A&B |  ...

valentas-kurauskas

improve short-circuit logic

3

i just checked the code of `capabilities()`, and what @randy3k did in #62 is probably not that fast after all. this is the code: ``` r capabilities

flying-sheep

repr does not handle nested dataframes

5

``` R # https://blog.rstudio.org/2016/02/02/tidyr-0-4-0/ library(gapminder) library(dplyr) library(tidyr) by_country % group_by(continent, country) %>% nest() print(by_country) # prints ok by_country # has the content of the data column messed up ``` One...

jankatins

error in repr for a tbl_df

3

``` R library("dplyr") library("tibble") library("jsonlite") download.file("http://jsonstudio.com/wp-content/uploads/2014/02/world_bank.zip", "world_bank.zip") world_bank

jankatins

currently, `repr_markdown(matrix(1:4, 2))` calls `repr_markdown.numeric` which is pretty wrong… for a big matrix this results in `repr_markdown` taking a very long time for creating a huge bad string

flying-sheep

The output of `methods()` has this class

flying-sheep

Check and increase test coverage

1

Options include - https://github.com/jimhester/covr - https://github.com/MangoTheCat/testCoverage One predicate that every repr function for every format has to fullfill is ``` r r

flying-sheep

this would really spice up the tables shown in the pager. also the pager differs in styling from the output since its tables don’t get styled at all. in jupyter/notebook#1182,...

flying-sheep

better stack traces (e.g. for plotting and help_files_with_topic)

6

This is what currently happens if a ggplot object raises an error: ``` R library(ggplot2) data repr_text.default does print -> evaluate registers a plot -> calls the handler for a...

jankatins

Use pander and xtable for matrix, data.frame and so on

3

@daroczig raised the very valid point in https://github.com/Rapporter/pander/pull/251, that we should not (re)implement how we do html and MD conversation of standard objects in repr: > Sorry for the silly...

jankatins