Use array spread syntax instead of Array.from

Author: zsparal

chapters/data_compression/huffman/code/javascript/huffman.js

@@ -2,7 +2,7 @@ function encode(str) {
   const tree = createTree(str);
   const codebook = createCodebook(tree);
   return {
-    string: Array.from(str, c => codebook[c]).join(""),
+    string: [...str].map(c => codebook[c]).join(""),
     tree,
     codebook
   };
@@ -82,4 +82,3 @@ const encoded = encode("bibbity bobbity");
 const decoded = decode(encoded.string, encoded.tree);
 console.log(encoded.string);
 console.log(decoded);
-

chapters/tree_traversal/code/javascript/tree.js

@@ -5,7 +5,7 @@ function createTree(rows, children) {
 
   return {
     id: rows,
-    children: Array.from(Array(children).keys(), () => createTree(rows - 1, children))
+    children: [...Array(children).keys()].map(() => createTree(rows - 1, children))
   };
 }