Lab free: Move answer to JavaScript

david-a-wheeler · david-a-wheeler · commit f74f21c5b29a · 2025-01-29T18:25:01.000-05:00
Signed-off-by: David A. Wheeler &lt;dwheeler@dwheeler.com&gt;
diff --git a/docs/labs/free.html b/docs/labs/free.html
@@ -7,63 +7,11 @@
 <link rel="stylesheet" href="checker.css">
 <script src="js-yaml.min.js"></script>
 <script src="checker.js"></script>
+<script src="free.js"></script>
 <link rel="license" href="https://creativecommons.org/licenses/by/4.0/">
 
 <!-- See create_labs.md for how to create your own lab! -->
 
-<!-- Sample expected answer -->
-<script id="expected0" type="plain/text">
-  asprintf(&result, "pre_%s_post", s);
-  free(s);
-  return result;
-</script>
-
-<!-- Full pattern of correct answer -->
-<script id="correct0" type="plain/text">
-\s*
-  asprintf \( & result , "pre_%s_post" , s \) ;
-  free \( s \) ;
-  return result ;
-\s*
-</script>
-
-<script id="info" type="application/yaml">
----
-hints:
-- present: |-
-    \s*free[^;]*; asprintf
-  text: Do not free the input first, you need to use it.
-  examples:
-    - - |-
-           free(s);
-           asprintf(&result, "pre_%s_post", s);
-- present: |-
-    \s* asprintf \(
-  absent: free
-  text: This fails to free the memory, likely leading to a missing release.
-  examples:
-    - - |-
-           asprintf(&result, ""pre_%s_post"", s);
-- absent: return
-  text: This fails to return the result.
-- absent: |-
-    \s* [^;]+;[^;]+;[^;]+; \s*
-  text: There should be 3 statements, each terminated with a semicolon.
-  examples:
-    - - |-
-           asprintf(&result, "pre_%s_post", s);
-           free(s);
-           return result
-- present: |-
-    \s* return result ; free \s*
-  text: Do not do anything after the return, it will not execute.
-  examples:
-    - - |-
-           asprintf(&result, "pre_%s_post", s);
-           return result;
-           free(s);
-# debug: true
-</script>
 </head>
 <body>
 <!-- For GitHub Pages formatting: -->
diff --git a/docs/labs/free.js b/docs/labs/free.js
@@ -0,0 +1,57 @@
+info =
+{
+  hints: [
+    {
+      present: String.raw`\s*free[^;]*; asprintf`,
+      text: "Do not free the input first, you need to use it.",
+      examples: [
+        [
+          "free(s);\nasprintf(&result, \"pre_%s_post\", s);"
+        ]
+      ]
+    },
+    {
+      present: String.raw`\s* asprintf \(`,
+      absent: "free",
+      text: "This fails to free the memory, likely leading to a missing release.",
+      examples: [
+        [
+          "asprintf(&result, \"\"pre_%s_post\"\", s);"
+        ]
+      ]
+    },
+    {
+      absent: "return",
+      text: "This fails to return the result."
+    },
+    {
+      absent: String.raw`\s* [^;]+;[^;]+;[^;]+; \s*`,
+      text: "There should be 3 statements, each terminated with a semicolon.",
+      examples: [
+        [
+          "asprintf(&result, \"pre_%s_post\", s);\nfree(s);\nreturn result"
+        ]
+      ]
+    },
+    {
+      present: String.raw`\s* return result ; free \s*`,
+      text: "Do not do anything after the return, it will not execute.",
+      examples: [
+        [
+          "asprintf(&result, \"pre_%s_post\", s);\nreturn result;\nfree(s);"
+        ]
+      ]
+    }
+  ],
+  expected: [
+`  asprintf(&result, "pre_%s_post", s);
+  free(s);
+  return result;`
+  ],
+  correct: [
+    String.raw`\s*
+      asprintf \( & result , "pre_%s_post" , s \) ;
+      free \( s \) ;
+      return result ; \s*`
+  ],
+}
