renamed

Pt4_Pt7BlogList/utils/list_helper.js

@@ -0,0 +1,30 @@
+const dummy = (blogs) => {
+  return 1;
+};
+const totalLikes = (blogs) => {
+  return blogs.reduce((acc, cur) => acc + cur.likes, 0);
+};
+const favoriteBlog = (blogs) => {
+  let result = blogs.sort((a, b) => a.score - b.score);
+  return result[0].likes;
+};
+
+const mostLikes = (blogs) => {
+  let authors = new Map();
+  blogs.forEach((el) => {
+    if (authors.has(el.author))
+      authors.set(el.author, authors.get(el.author) + el.likes);
+    else authors.set(el.author, el.likes);
+  });
+  return Math.max(...authors.values())
+};
+const mostBlogs = (blogs) => {
+  let authors = new Map();
+  blogs.forEach((el) => {
+    if (authors.has(el.author))
+      authors.set(el.author, authors.get(el.author) + 1);
+    else authors.set(el.author, 1);
+  });
+  return Math.max(...authors.values())
+};
+module.exports = { dummy, mostLikes, mostBlogs, totalLikes, favoriteBlog };