Add reverse-string exercise

config.json

@@ -191,6 +191,14 @@
           "math"
         ]
       },
+      {
+        "slug": "reverse-string",
+        "name": "Reverse String",
+        "uuid": "1b4c8b0f-a7cc-4db1-a0ad-485dc2b320d7",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "square-root",
         "name": "Square Root",

exercises/practice/reverse-string/.docs/instructions.md

@@ -0,0 +1,7 @@
+# Instructions
+
+Reverse a string
+
+For example:
+input: "cool"
+output: "looc"

exercises/practice/reverse-string/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "BNAndras"
+  ],
+  "files": {
+    "solution": [
+      "reverse-string.coffee"
+    ],
+    "test": [
+      "reverse-string.spec.coffee"
+    ],
+    "example": [
+      ".meta/example.coffee"
+    ]
+  },
+  "blurb": "Reverse a string.",
+  "source": "Introductory challenge to reverse an input string",
+  "source_url": "https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb"
+}

exercises/practice/reverse-string/.meta/example.coffee

@@ -0,0 +1,5 @@
+class ReverseString  
+  @reverse: (str) -> 
+    str.split("").reverse().join ""
+
+module.exports = ReverseString

exercises/practice/reverse-string/.meta/tests.toml

@@ -0,0 +1,28 @@
+# 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.
+
+[c3b7d806-dced-49ee-8543-933fd1719b1c]
+description = "an empty string"
+
+[01ebf55b-bebb-414e-9dec-06f7bb0bee3c]
+description = "a word"
+
+[0f7c07e4-efd1-4aaa-a07a-90b49ce0b746]
+description = "a capitalized word"
+
+[71854b9c-f200-4469-9f5c-1e8e5eff5614]
+description = "a sentence with punctuation"
+
+[1f8ed2f3-56f3-459b-8f3e-6d8d654a1f6c]
+description = "a palindrome"
+
+[b9e7dec1-c6df-40bd-9fa3-cd7ded010c4c]
+description = "an even-sized word"

exercises/practice/reverse-string/reverse-string.coffee

@@ -0,0 +1,4 @@
+class ReverseString  
+  @reverse: (str) -> 
+
+module.exports = ReverseString

exercises/practice/reverse-string/reverse-string.spec.coffee

@@ -0,0 +1,26 @@
+ReverseString = require './reverse-string'
+
+describe 'ReverseString', ->
+  it 'An empty string', ->
+    reversed = ReverseString.reverse("")
+    expect(reversed).toEqual("")
+
+  xit 'A word', ->
+    reversed = ReverseString.reverse("robot")
+    expect(reversed).toEqual("tobor")
+
+  xit 'A capitalized word', ->
+    reversed = ReverseString.reverse("Ramen")
+    expect(reversed).toEqual("nemaR")
+
+  xit 'A sentence with punctuation', ->
+    reversed = ReverseString.reverse("I'm hungry!")
+    expect(reversed).toEqual("!yrgnuh m'I")
+
+  xit 'A palindrome', ->
+    reversed = ReverseString.reverse("racecar")
+    expect(reversed).toEqual("racecar")
+
+  xit 'An even-sized word', ->
+    reversed = ReverseString.reverse("drawer")
+    expect(reversed).toEqual("reward")