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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
basically if true return true
Completely flew over my head to use ternary operators here!
Loll
Conditional operator
What does the ? and : mean in Javascript?
The second part (true or false) is unnecesary. It's already assesed in the parentheses
Hi! I found that
new Array(3)
is not produce[undefined, undefined, undefined]
. It produced[ <3 empty items> ]
. And we are cannot to interact with it by Array.prototype methods. We must to convert it to array withArray.from
for example.-1, needs more
?:
.I see this sort of thing a lot in code, and it's redundant. You should just return the original conditional check. Consider it as if it were the folowing:
The above would be better written:
Same idea with what is written in this solution.
This comment is hidden because it contains spoiler information about the solution
Ternacy?
How come you both do the same typo? :)
Thanks everyone, your explanations helped me a lot.
You can create arrays like that: new Array(n), where n is quantity of elements. For example, new Array(3) will produce [undefined, undefined, undefined]. Besides, every array has join method, which creates a string from the array's elements and join's argument will play as separator, so that [1,2,3].join('anyStringYouLike') will be evaluated in '1anyStringYouLike2anyStringYouLike3'. And [undefined, undefined, undefined].join('String') will be evaluated in 'StringString'.
Hope this explanation will help to undestand this solution.
I believe Array is a class, and when passed a number like this, it returns an empty array of size n + 1 (empty meaning, each element is undefined).
Example:
Could someone please explain what's going on here?
Array(n+1).join(str)
I couldn't find anything on the net about Array() taking parameters. Is that an object or a method or what?
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