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  • Patrick Toy thinks this is interesting:

// sum up all the values of an array
console.log([1,2,3,4,5].reduce(function(x,y){return x+y}, 0));
// sum up all the values of an array
console.log([1,2,3,4,5].reduce(function(x,y){return x+y}, 0))

From

Cover of Functional Programming in JavaScript

Note

Typo: duplicate text.