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therealklanni/yl-example.js

Created August 10, 2015 02:16
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yl-example.js
// pronounce Yl like "while" ;)
let Yl = Y(f => (g, i) => {
let r = g(i - 1)
return r !== false ? r : f(g, i - 1)
})
// extremely contrived example using Yl
let people = [ 'Shannon', 'Joseph', 'Eric', 'Mike']
Yl(i => {
log(people[i])
people[i] = people[i] + i
return !i
}, people.length)
log(people) // => [ 'Shannon0', 'Joseph1', 'Eric2', 'Mike3' ]
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Refer to The Mysterious Y-combinator

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