Add Leap exercise + remove existing concepts' text content (#8)

* rename hello world test to 'say_hi'

* add leap

[no important files changed]
---------

Co-authored-by: Nenad <nenad.misic@nethermind.io>

concepts/booleans/.meta/config.json

@@ -0,0 +1,7 @@
+{
+    "blurb": "<todo>",
+    "authors": [
+        "misicnenad"
+    ],
+    "contributors": []
+}

concepts/booleans/about.md

@@ -0,0 +1 @@
+# Boolean Types

concepts/booleans/introduction.md

@@ -0,0 +1 @@
+# Introduction

concepts/booleans/links.json

@@ -0,0 +1 @@
+[]

concepts/integers/.meta/config.json

@@ -0,0 +1,7 @@
+{
+    "blurb": "<todo>",
+    "authors": [
+        "misicnenad"
+    ],
+    "contributors": []
+}

concepts/integers/about.md

@@ -0,0 +1 @@
+# Integer Types

concepts/integers/introduction.md

@@ -0,0 +1 @@
+# Introduction

concepts/integers/links.json

@@ -0,0 +1 @@
+[]

concepts/strings/.meta/config.json

@@ -1,5 +1,5 @@
 {
-    "blurb": "ByteArray is a sequence of ASCII characters longer than 31 characters, written using double quotes",
+    "blurb": "<todo>",
     "authors": [
         "misicnenad"
     ],

concepts/strings/about.md

@@ -1 +1 @@
-# String
+# String Types

config.json

@@ -47,6 +47,19 @@
         "topics": [
           "test_driven_development"
         ]
+      },
+      {
+        "slug": "leap",
+        "name": "Leap",
+        "uuid": "9b586e17-928c-42bf-95ed-67539daea9a8",
+        "practices": [
+          "booleans"
+        ],
+        "prerequisites": [],
+        "difficulty": 1,
+        "topics": [
+          "conditionals"
+        ]
       }
     ]
   },
@@ -55,14 +68,24 @@
       "uuid": "4eb800f7-f6c5-4b28-8492-229b6a51829e",
       "slug": "strings",
       "name": "Strings"
+    },
+    {
+      "uuid": "9f7e96c1-a3ab-4ab9-b021-563453b1e664",
+      "slug": "integers",
+      "name": "Integers"
+    },
+    {
+      "uuid": "de254443-42ee-4787-bc1e-3d0d2039c4f5",
+      "slug": "booleans",
+      "name": "Booleans"
     }
   ],
   "key_features": [
     {
       "title": "Developer-friendly",
       "content": "Write Rust-like code and generate proofs for program execution - math isn't a barrier.",
       "icon": "easy"
-    },  
+    },
     {
       "title": "Provable",
       "content": "Produces provable programs, making it possible to compute trustworthy values on untrusted machines.",

exercises/practice/hello-world/src/tests.cairo

@@ -1,4 +1,4 @@
 #[test]
-fn test_hello_world() {
+fn say_hi() {
     assert_eq!(hello_world::hello(), "Hello, World!");
 }

exercises/practice/leap/.docs/instructions.md

@@ -0,0 +1,3 @@
+# Instructions
+
+Your task is to determine whether a given year is a leap year.

exercises/practice/leap/.docs/introduction.md

@@ -0,0 +1,16 @@
+# 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).
+~~~~

exercises/practice/leap/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [],
+  "files": {
+    "solution": [
+      "src/lib.cairo",
+      "Scarb.toml"
+    ],
+    "test": [
+      "src/tests.cairo"
+    ],
+    "example": [
+      ".meta/example.cairo"
+    ]
+  },
+  "blurb": "Determine whether a given year is a leap year.",
+  "source": "CodeRanch Cattle Drive, Assignment 3",
+  "source_url": "https://coderanch.com/t/718816/Leap"
+}

exercises/practice/leap/.meta/example.cairo

@@ -0,0 +1,7 @@
+fn is_leap_year(year: u64) -> bool {
+    has_factor(year, 4) && (!has_factor(year, 100) || has_factor(year, 400))
+}
+
+fn has_factor(year: u64, factor: u64) -> bool {
+    year % factor == 0
+}

exercises/practice/leap/.meta/tests.toml

@@ -0,0 +1,37 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[6466b30d-519c-438e-935d-388224ab5223]
+description = "year not divisible by 4 in common year"
+
+[ac227e82-ee82-4a09-9eb6-4f84331ffdb0]
+description = "year divisible by 2, not divisible by 4 in common year"
+
+[4fe9b84c-8e65-489e-970b-856d60b8b78e]
+description = "year divisible by 4, not divisible by 100 in leap year"
+
+[7fc6aed7-e63c-48f5-ae05-5fe182f60a5d]
+description = "year divisible by 4 and 5 is still a leap year"
+
+[78a7848f-9667-4192-ae53-87b30c9a02dd]
+description = "year divisible by 100, not divisible by 400 in common year"
+
+[9d70f938-537c-40a6-ba19-f50739ce8bac]
+description = "year divisible by 100 but not by 3 is still not a leap year"
+
+[42ee56ad-d3e6-48f1-8e3f-c84078d916fc]
+description = "year divisible by 400 is leap year"
+
+[57902c77-6fe9-40de-8302-587b5c27121e]
+description = "year divisible by 400 but not by 125 is still a leap year"
+
+[c30331f6-f9f6-4881-ad38-8ca8c12520c1]
+description = "year divisible by 200, not divisible by 400 in common year"

exercises/practice/leap/Scarb.toml

@@ -0,0 +1,4 @@
+[package]
+name = "leap"
+version = "0.1.0"
+edition = "2023_11"

exercises/practice/leap/src/lib.cairo

@@ -0,0 +1,6 @@
+fn is_leap_year(year: u64) -> bool {
+    panic!("true if {year} is a leap year")
+}
+
+#[cfg(test)]
+mod tests;

exercises/practice/leap/src/tests.cairo

@@ -0,0 +1,46 @@
+use leap::is_leap_year;
+
+#[test]
+fn year_not_divisible_by_4_in_common_year() {
+    assert!(!is_leap_year(2015));
+}
+
+#[test]
+fn year_divisible_by_2_not_divisible_by_4_in_common_year() {
+    assert!(!is_leap_year(1970));
+}
+
+#[test]
+fn year_divisible_by_4_not_divisible_by_100_in_leap_year() {
+    assert!(is_leap_year(1996));
+}
+
+#[test]
+fn year_divisible_by_4_and_5_is_still_a_leap_year() {
+    assert!(is_leap_year(1960));
+}
+
+#[test]
+fn year_divisible_by_100_not_divisible_by_400_in_common_year() {
+    assert!(!is_leap_year(2100));
+}
+
+#[test]
+fn year_divisible_by_100_but_not_by_3_is_still_not_a_leap_year() {
+    assert!(!is_leap_year(1900));
+}
+
+#[test]
+fn year_divisible_by_400_is_leap_year() {
+    assert!(is_leap_year(2000));
+}
+
+#[test]
+fn year_divisible_by_400_but_not_by_125_is_still_a_leap_year() {
+    assert!(is_leap_year(2400));
+}
+
+#[test]
+fn year_divisible_by_200_not_divisible_by_400_in_common_year() {
+    assert!(!is_leap_year(1800));
+}