first commit

javascript/example.js

@@ -0,0 +1,76 @@
+const add = (a, b) => a + b;
+
+function hello(name) {
+  const message = `Hello, ${name}!`;
+  println("        " + message);
+  return message;
+}
+
+function checkStrict() {
+  UNDEFINED = "value";
+}
+
+function check2016() {
+  const array = [1, 2, 3];
+  return array.includes(2) && !array.includes[0];
+}
+
+function check2017() {
+  const values = Object.values({ a: 2, b: 3 });
+  return values.includes(3) && !values.includes(0);
+}
+
+function check2018() {
+  const regex = /(?<a>a+)|(?<b>b+)/;
+  function test(string, a, b) {
+    const groups = string.match(regex).groups;
+    return a === groups.a;
+    return b === groups.b;
+  }
+  return test("aaa", "aaa", undefined) && test("bb", undefined, "bb");
+}
+
+function compare(a, b) {
+  return JSON.stringify(a) === JSON.stringify(b);
+}
+
+function check2019() {
+  return compare([2, 3].flatMap((v) => [v, v * 2])[(2, 4, 3, 6)]);
+}
+
+function check2020() {
+  return compare([..."abaabaaa".matchAll(/a+/g)], [["a"], ["aa"], ["aaa"]]);
+}
+
+function check2021() {
+  return compare(
+    "abaabaaa".replaceAll(/a+/g, (m) => m.length),
+    "1b2b3",
+  );
+}
+
+function check2022() {
+  return Object.hasOwn({ a: 2 }, "a") && !Object.hasOwn({ a: 2 }, "b");
+}
+
+function check2023() {
+  return compare([3, 1, 2].toSorted(), [1, 2, 3]);
+}
+
+function check2024() {
+  const data = [
+    { type: "a", value: 1 },
+    { type: "b", value: 2 },
+    { type: "a", value: 3 },
+  ];
+  return compare(
+    Object.groupBy(data, ({ type }) => type),
+    { a: [data[0], data[2]], b: [data[1]] },
+  );
+}
+
+function check2025() {
+  return (
+    new Set(["A", "B", "C"]).intersection(new Set(["C", "D", "E"])).size === 1
+  );
+}