• Next 7 Missions + Electronic Station


Good day CheckiO users!

Another 7 missions have been added to the Map. Continue making your progress and finding new interesting solutions.

Hope you are enjoying the TypeScript version of the js.CheckiO portal!

We continue making improvements and currently we've updated Node.js to the version 14.

The syntax has also been updated.

There are two new features that you can start using for your solutions on CheckiO:  the nullish coalescing operator  (which is designed to return the results of the right hand-side expression if the left hand-side expression is either null or undefined)  and optional chaining operator  (that gives an opportunity of simplify accessing values through connected objects when it's possible that a reference or function may be undefined or null).

    Highlights from the JS world:
  • You agree that writing JavaScript free of bugs is hard? But actually it's possible to create JavaScript code that does not produce runtime exceptions at all! You have to check out how!
  • Node.js 14 was released! Know all about it's newest improvements: an upgrade of V8 to V8 8.1, experimental Async Local Storage API, changes in streams, removal of the Experimental Modules warning, new compiler, stable diagnostic report, etc.
  • ES2020has two great operators, optional chaining and nullish coalescing, which are highly useful if your desire is to prevent your applications from errors while working with deep nested objects.you have to know more on what they actually do!

The users who’ve made the TOP 3 this month are vincent.tscherter, mortonfox, and Sim0000.  You are doing great, guys! Keep on coding!

Welcome to CheckiO - games for coders where you can improve your codings skills.

The main idea behind these games is to give you the opportunity to learn by exchanging experience with the rest of the community. Every day we are trying to find interesting solutions for you to help you become a better coder.

Join the Game