( ! ) Notice: Undefined index: description in /home/prototurk.com/public_html/app/controller/demo.php on line 171 Call Stack # Time Memory Function Location 1 0.0002 361088 {main}( ) .../index.php:0 2 0.0038 442936 require( '/home/prototurk.com/public_html/app/controller/demo.php' ) .../index.php:101
const posts = [
{
title: "Post 1",
tags: ["php", "css"],
},
{
title: "Post 2",
tags: ["js", "c#"],
},
{
title: "Post 3",
tags: ["html5", "css"],
},
];
const allTags = posts.reduce((acc, post) => [...acc, ...post.tags], []);
console.log([...new Set(allTags)])