jimhester

Static analysis tools for C and C++ code

• docker for R package debugging - https://www.jimhester.com/post/2017-10-13-docker/

• Winston Chang's R-debug container - https://github.com/wch/r-debug

The compiler has built in static analysis! Use warnings!

usethis::edit_r_makevars()

jimhester

date	topic	url
2021-01-11	issue titles	https://twitter.com/jimhester_/status/1348742632491646976
2021-01-13	new features	https://twitter.com/jimhester_/status/1349369619891564544
2021-01-15	writing too much	https://twitter.com/jimhester_/status/1350076918520045568
2021-01-19	imitation in PRs	https://twitter.com/jimhester_/status/1351533870261399555
2021-01-20	issues crop	https://twitter.com/jimhester_/status/1351930803656257544
2021-01-25	community sites	https://twitter.com/jimhester_/status/1353749482425491456
2021-01-29	second contributions	https://twitter.com/jimhester_/status/1355195248612356099
2021-02-01	robot pedantry	https://twitter.com/jimhester_/status/1356272709345419264

jimhester

db_lifecycles <- function(db) {
  lifecycle_patterns <- paste0("(?:",
    paste(collapse = "|",
      c("lifecycle::badge\\([\\\\]\"",
        "rlang:::lifecycle\\([\\\\]\"",
        "list\\(\"lifecycle-",
        "https://www.tidyverse.org/lifecycle/#"
      )),
    ")([\\w-]+)"
  )

jimhester

# We want to run this on all pushes on the 'main' branch, whether it is called main or master.
on:
  push:
    branches:
      - main
      - master
# We also want to run it on pull requests targetting the 'main' branch
  pull_request:
    branches:
      - main

jimhester

Q1. Are all the latest release versions of tidyverse and tidymodels packages already using cpp11?

All tidyverse packages that used Rcpp have been converted except for readxl and lubridate. We plan to finish converting the remainder of the packages in the next 6 months.

Q2. C++20 brings a lot of exciting features to the language, do you plan to also add a {cpp20} package too?

I agree! It is possible, but it would not be for at least 5 to 7 years from now, if ever. Compiler support and availablity often lags the language specifications significantly. However you can definitely use C++20 features with cpp11 in your package today if you like!

Q3. So writable:: is like not using const& in Rcpp?

jimhester

#!/bin/bash

# R recommends setting this to avoid issues with programs like sed:
export LANG=C

# Get version in major.minor format:
VERSION=`sed 's/\([0-9]*.[0-9]*\).[0-9]*.*/\1/' VERSION`

# Use version-dev as default folder target:
TARGET=${1:-$VERSION-dev}

jimhester

ld <- .getNamespaceInfo(asNamespace("datasets"), "lazydata")

library(dplyr)
library(purrr)

df <- tibble::tibble(
  name = names(ld),
  data = map(name, ~ ld[[.x]]),
  is_df = map_lgl(data, inherits, "data.frame")
  ) %>%

jimhester

FROM rstudio/r-base:3.6.3-bionic

RUN apt-get -qq update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y software-properties-common && \
    add-apt-repository -y ppa:ubuntugis/ppa


Run apt-get install -y software-properties-common && \
      add-apt-repository -y ppa:ubuntugis/ppa && \
      apt-get update && \

jimhester

Enable use of Instruments from the command line with R

First, the time profiler template has a space in it, which breaks when called from R, so we need to add sym link to it that doesn't have a space.

cd /Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/Resources/templates
sudo ln -s 'Time Profiler.tracetemplate' 'time-profiler.tracetemplate'

jimhester

library(readr)
the_dates   <- c("2020-02-04", "04 February 2020", "2/4/20"  , "4/2/20"  , "04 Février 2020")
the_formats <- c("%Y-%m-%d", "%d %B %Y", "%m/%d/%y", "%d/%m/%y", "%d %B %Y")
the_locales <- list(locale("en"), locale("en"), locale("en"), locale("en"), locale("fr"))

purrr::pmap(
  list(the_dates, the_formats, the_locales),
  function(date, format, locale) {
    parse_date(date, format = format, locale = locale)
  }