The array methods filter, map, reduce have been around for a while and they make working with arrays easier. But sometimes it is hard for new JavaScript developers to determine which of the array methods they need to use. In this post, I will give a ...
samolusola.meThank you,
very nice article.
About map, I find a bit confusing the use of the remove concept in this sentence:
That is: you pick each ball,
removethe rating tag and dump it into another box.
Probably I am taking that remove too literally but, in my understanding, map does not remove from the temporary item: instead it "borrows" a copy of something from that temporary item to apply a manipulation on it and, thereafter, add it to (another box).
tags = balls.map(ball => {
ball.rating;
console.log("temp ball after collecting rating: ", ball);
});
output:
temp ball after collecting rating:
Object { brand: "Adidas", color: "blue", rating: 5 }
debugger eval code:3:11
temp ball after collecting rating:
Object { brand: "Konami", color: "red", rating: 4 }
debugger eval code:3:11
temp ball after collecting rating:
Object { brand: "Verah", color: "blue", rating: 2 }
debugger eval code:3:11
temp ball after collecting rating:
Object { brand: "Adidas", color: "green", rating: 3 }
Any suggestion?
Good explanation✌️ New JS(2019) introduce another version of reduce(), known as reduceRight() hashnode.com/post/reduceright-and-copywithin-cjvl…
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