js tricks

Author: GrosSacASac

js/tricks.md

@@ -0,0 +1,35 @@
+# JS tricks
+
+`Object.assign` is useful on arrays.
+
+```
+const initialScores = [0, 0, 0];
+// player a, player b, total games
+const scores = [5, 2, 7];
+
+// reset scores
+Object.assign(scores, initialScores);
+```
+
+`{}` can be used to create local scopes anywhere
+
+```
+const minMax = function (numbers) {
+  const results = [];
+  // variables localResult does not clash,
+  // independent blocks are used
+  {
+    const localResult = Math.min(...numbers);
+    results.push(localResult);
+  }
+
+  {
+    const localResult = Math.max(...numbers);
+    results.push(localResult);
+  }
+  return results
+};
+
+```
+
+