Object.fromEntries

By  on  

The Object object has been buffed with useful methods over the past few years.  Object.keys, Object.values, Object.freeze, and Object.assign all address frequently desired functionality.  One of the new Object methods is fromEntries, which accepts a Map or map-like array nesting and converts it to a useful object literal!

Convert Map to Object

Converting a Map to a key:value object is simple with Object.fromEntries:

Object.fromEntries(new Map([["a", "b"], ["c", "d"]]));
// Object { a: "b", c: "d" }

Convert a Nested Array to Object

Since the simple nested array is much like a Map, you can also do the following:

Object.fromEntries([["a", "b"], ["c", "d"]]);
// Object { a: "b", c: "d" }

There are great uses for Maps but there's nothing as amazing as a simple key:value object to store and reference information!

Recent Features

  • By
    Being a Dev Dad

    I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

Incredible Demos

  • By
    Get Slick with MooTools Kwicks

    When I first saw MooTools graphical navigation, I was impressed. I thought it was a very simple yet creative way of using Flash. When I right-clicked and saw that it was JavaScript, I was floored. How could they achieve such...

  • By
    Flashy FAQs Using MooTools Sliders

    I often qualify a great website by one that pay attention to detail and makes all of the "little things" seem as though much time was spent on them. Let's face it -- FAQs are as boring as they come. That is, until you...

Discussion

    Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!