R leap

r/README.md

@@ -14,3 +14,4 @@
 ## [Exercises](https://exercism.org/tracks/r/exercises)
 
 - [raindrops](./raindrops/README.md)
+- [leap](./leap/README.md)

r/leap/.exercism/config.json

@@ -0,0 +1,24 @@
+{
+  "authors": [
+    "jonmcalder"
+  ],
+  "contributors": [
+    "jonboiser",
+    "katrinleinweber",
+    "zacchaeusluke"
+  ],
+  "files": {
+    "solution": [
+      "leap.R"
+    ],
+    "test": [
+      "test_leap.R"
+    ],
+    "example": [
+      ".meta/example.R"
+    ]
+  },
+  "blurb": "Determine whether a given year is a leap year.",
+  "source": "CodeRanch Cattle Drive, Assignment 3",
+  "source_url": "https://coderanch.com/t/718816/Leap"
+}

r/leap/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"r","exercise":"leap","id":"f0cd17767f7b4b34ae508898ddceec37","url":"https://exercism.org/tracks/r/exercises/leap","handle":"vpayno","is_requester":true,"auto_approve":false}

r/leap/HELP.md

@@ -0,0 +1,38 @@
+# Help
+
+## Running the tests
+
+Tests require the `{testthat}` package to be installed in R.
+To run the tests for an exercise, simply execute the `test_<exercise_name>.R` script from within the exercise's directory.
+
+This can be conveniently done with [testthat's `auto_test` function](https://testthat.r-lib.org/reference/auto_test.html). Because exercism code and tests are in the same folder, use this same path for both `code_path` and `test_path` parameters. On the command-line, you can also run `Rscript test_<exercise_name>.R`.
+
+See the [tests page](https://exercism.org/docs/tracks/r/tests) for more information.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit leap.R` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [R track's documentation](https://exercism.org/docs/tracks/r)
+- The [R track's programming category on the forum](https://forum.exercism.org/c/programming/r)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can try one of the following resources:
+
+- [StackOverflow](https://stackoverflow.com/questions/tagged/r) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
+- [#rstats](https://twitter.com/search?q=%23rstats) is the hashtag to use if you are asking for help or guidance on Twitter. The R community is very active on Twitter and always try to help those who are new to R.
+- [/r/rstats](https://www.reddit.com/r/rstats) is the R subreddit.
+- [RStudio Community](https://community.rstudio.com/) is another active and helpful R community.

r/leap/README.md

@@ -0,0 +1,46 @@
+# Leap
+
+Welcome to Leap on Exercism's R Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Introduction
+
+A leap year (in the Gregorian calendar) occurs:
+
+- In every year that is evenly divisible by 4.
+- Unless the year is evenly divisible by 100, in which case it's only a leap year if the year is also evenly divisible by 400.
+
+Some examples:
+
+- 1997 was not a leap year as it's not divisible by 4.
+- 1900 was not a leap year as it's not divisible by 400.
+- 2000 was a leap year!
+
+~~~~exercism/note
+For a delightful, four-minute explanation of the whole phenomenon of leap years, check out [this YouTube video](https://www.youtube.com/watch?v=xX96xng7sAE).
+~~~~
+
+## Instructions
+
+Your task is to determine whether a given year is a leap year.
+
+## Source
+
+### Created by
+
+- @jonmcalder
+
+### Contributed to by
+
+- @jonboiser
+- @katrinleinweber
+- @zacchaeusluke
+
+### Based on
+
+CodeRanch Cattle Drive, Assignment 3 - https://coderanch.com/t/718816/Leap
+
+### My Solution
+
+- [leap.R](./leap.R)
+- [run-tests](./run-tests-r.txt)

r/leap/leap.R

@@ -0,0 +1,15 @@
+leap <- function(year) {
+  if (year %% 400 == 0) {
+    return(TRUE)
+  }
+
+  if (year %% 100 == 0) {
+    return(FALSE)
+  }
+
+  if (year %% 4 == 0) {
+    return(TRUE)
+  }
+
+  return(FALSE)
+}

r/leap/run-tests-r.txt

@@ -0,0 +1,65 @@
+Running automated test file(s):
+
+
+===============================================================================
+
+Running: ../../.github/citools/r/r-test
+
+Running R Tests
+
+R versions:
+
+	R version 4.3.3 (2024-02-29) -- "Angel Food Cake"
+	Copyright (C) 2024 The R Foundation for Statistical Computing
+	Platform: x86_64-pc-linux-gnu (64-bit)
+
+	R is free software and comes with ABSOLUTELY NO WARRANTY.
+	You are welcome to redistribute it under the terms of the
+	GNU General Public License versions 2 or 3.
+	For more information about these matters see
+	https://www.gnu.org/licenses/.
+
+
+	Rscript (R) version 4.3.3 (2024-02-29)
+
+
+ ==============================================================================
+
+Running: Rscript test_leap.R
+
+Test passed 🎉
+Test passed 🎉
+Test passed 🎉
+Test passed 🎉
+
+real	0m0.586s
+user	0m0.525s
+sys	0m0.063s
+
+
+ ==============================================================================
+
+Exit code: 0
+
+real	0m0.790s
+user	0m0.619s
+sys	0m0.185s
+
+real	0m0.794s
+user	0m0.622s
+sys	0m0.187s
+
+===============================================================================
+
+Running: misspell ./leap.R ./test_leap.R
+
+real	0m0.018s
+user	0m0.014s
+sys	0m0.012s
+
+===============================================================================
+
+/home/vpayno/git_vpayno/exercism-workspace/r
+
+===============================================================================
+

r/leap/test_leap.R

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+source("./leap.R")
+library(testthat)
+
+test_that("year not divisible by 4: common year", {
+  year <- 2015
+  expect_equal(leap(year), FALSE)
+})
+
+test_that("year divisible by 4, not divisible by 100: leap year", {
+  year <- 2016
+  expect_equal(leap(year), TRUE)
+})
+
+test_that("year divisible by 100, not divisible by 400: common year", {
+  year <- 2100
+  expect_equal(leap(year), FALSE)
+})
+
+test_that("year divisible by 400: leap year", {
+  year <- 2000
+  expect_equal(leap(year), TRUE)
+})