Initial data commit

Task/Balanced-brackets/TypeScript/balanced-brackets.ts

@@ -0,0 +1,44 @@
+// Balanced brackets
+
+function isStringBalanced(str: string): bool {
+  var paired = 0;
+  for (var i = 0; i < str.length && paired >= 0; i++) {
+    var c = str.charAt(i);
+    if (c == '[')
+      paired++;
+    else if (c == ']')
+      paired--;
+  }
+  return (paired == 0);
+}
+
+function generate(n: number): string {
+  var opensCount = 0, closesCount = 0;
+  // Choose at random until n of one type generated
+  var generated: string[] = new Array(); // Works like StringBuilder
+  while (opensCount < n && closesCount < n) {
+    if (Math.floor(Math.random() * 2) == 0) {
+      ++opensCount;
+      generated.push("[");
+    } else {
+      ++closesCount;
+      generated.push("]");
+    }
+  }
+  // Now pad with the remaining other brackets
+  generated.push(opensCount == n ?
+    "]".repeat(n - closesCount) :
+    "[".repeat(n - opensCount));
+  return generated.join("");
+}
+
+console.log("Supplied examples");
+var tests: string[] = ["", "[]", "][", "[][]", "][][", "[[][]]", "[]][[]"];
+for (var test of tests)
+  console.log(`The string '${test}' is ${(isStringBalanced(test) ? "OK." : "not OK."));
+console.log();
+console.log("Random generated examples");
+for (var example = 0; example < 10; example++) {
+  var test = generate(Math.floor(Math.random() * 10) + 1);
+  console.log(`The string '${test}' is ${(isStringBalanced(test) ? "OK." : "not OK.")}`);
+}