Bonfire Record Collection Done

challenges/01-front-end-development-certification/basic-javascript.json

@@ -928,7 +928,7 @@
       "description": [
         "Quotes are not the only characters that can be <dfn>escaped</dfn> inside a string.  Here is a table of common escape sequences:",
         "<table class=\"table table-striped\"><thead><tr><th>Code</th><th>Output</th></tr></thead><tbody><tr><td>\\'</td><td>single quote</td></tr><tr><td>\\\"</td><td>double quote</td></tr><tr><td>\\\\</td><td>backslash</td></tr><tr><td>\\n</td><td>new line</td></tr><tr><td>\\r</td><td>carriage return</td></tr><tr><td>\\t</td><td>tab</td></tr><tr><td>\\b</td><td>backspace</td></tr><tr><td>\\f</td><td>form feed</td></tr></tbody></table>",
-        "<em>Note that the backslash itself must be escaped in order to display as a backslash.</em>",
+        "<emphasis>Note that the backslash itself must be escaped in order to display as a backslash.</emphasis>",
         "<h4>Instructions</h4>",
         "Encode the following sequence, separated by spaces:<br><code>backslash tab tab carriage-return new-line</code> and assign it to <code>myStr</code>"
       ],
@@ -4167,14 +4167,17 @@
         "You are given a JSON object representing (a small part of) your record collection.  Each album is identified by a unqiue id number and which has several properties. Not all albums have complete information.",
         "Write a function which takes an <code>id</code>, a property (<code>prop</code>), and a <code>value</code>.",
         "For the given <code>id</code> in <code>collection</code>:",
-        "If the <code>property</code> is <code>\"tracks\"</code>, push the <code>value</code> onto the end of the <code>tracks</code> array.",
         "If <code>value</code> is non-blank (<code>value !== \"\"</code>), then update or set the <code>value</code> for the <code>prop</code>.",
+        "If the <code>prop</code> is <code>\"tracks\"</code> and <code>value</code> is non-blank, push the <code>value</code> onto the end of the <code>tracks</code> array.",
         "If <code>value</code> is blank, delete that <code>prop</code>.",
         "Always return the entire collection object."
       ],
       "releasedOn": "11/27/2015",
       "tests": [
-        "assert(1===1, 'message: message here');"
+        "collection = collectionCopy; assert(update(5439, \"artist\", \"ABBA\")[5439][\"artist\"] === \"ABBA\", 'message: After <code>update(5439, \"artist\", \"ABBA\")</code>, <code>artist</code> should be <code>\"ABBA\"</code>');",
+        "update(2548, \"artist\", \"\"); assert(!collection[2548].hasOwnProperty(\"artist\"), 'message: After <code>update(2548, \"artist\", \"\")</code>, <code>artist</code> should not be set');",
+        "assert(update(1245, \"tracks\", \"Addicted to Love\")[1245][\"tracks\"].length === 1, 'message: After <code>update(1245, \"tracks\", \"Addicted to Love\")</code>, <code>tracks</code> should have a length of <code>1</code>');",
+        "update(2548, \"tracks\", \"\"); assert(!collection[2548].hasOwnProperty(\"tracks\"), 'message: After <code>update(2548, \"tracks\", \"\")</code>, <code>tracks</code> should not be set');"
       ],
       "challengeSeed": [
         "var collection = {",
@@ -4202,6 +4205,8 @@
         "      album: \"ABBA Gold\"",
         "    }",
         "};",
+        "// Keep a copy of the collection for tests",
+        "var collectionCopy = JSON.parse(JSON.stringify(collection));",
         "",
         "// Only change code below this line",
         "function update(id, prop, value) {",
@@ -4215,13 +4220,54 @@
         ""
       ],
       "tail": [
-        ""
+        "(function(x) { return \"collection = \\n\" + JSON.stringify(x, '\\n', 2); })(collection);"
       ],
       "solutions": [
-        ""
+        "var collection = {",
+        "    2548: {",
+        "      album: \"Slippery When Wet\",",
+        "      artist: \"Bon Jovi\",",
+        "      tracks: [ ",
+        "        \"Let It Rock\", ",
+        "        \"You Give Love a Bad Name\" ",
+        "      ]",
+        "    },",
+        "    2468: {",
+        "      album: \"1999\",",
+        "      artist: \"Prince\",",
+        "      tracks: [ ",
+        "        \"1999\", ",
+        "        \"Little Red Corvette\" ",
+        "      ]",
+        "    },",
+        "    1245: {",
+        "      artist: \"Robert Palmer\",",
+        "      tracks: [ ]",
+        "    },",
+        "    5439: {",
+        "      album: \"ABBA Gold\"",
+        "    }",
+        "};",
+        "// Keep a copy of the collection for tests",
+        "var collectionCopy = JSON.parse(JSON.stringify(collection));",
+        "",
+        "// Only change code below this line",
+        "function update(id, prop, value) {",
+        "  if(value !== \"\") {",
+        "    if(prop === \"tracks\") {",
+        "      collection[id][prop].push(value);",
+        "    } else {",
+        "      collection[id][prop] = value;",
+        "    }",
+        "  } else {",
+        "    delete collection[id][prop];",
+        "  }",
+        "",
+        "  return collection;",
+        "}"
       ],
-      "type": "waypoint",
-      "challengeType": "1",
+      "type": "bonfire",
+      "challengeType": "5",
       "nameCn": "",
       "nameFr": "",
       "nameRu": "",
@@ -5446,4 +5492,4 @@
       "challengeType": "0"
     }
   ]
-}
+}