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electerious/fifo.js

Last active August 13, 2017 18:12
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Array with a max number of items
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fifo.js
const fifo = (length) => {
const arr = []
return (value) => {
if (value===undefined) return arr
if (arr.length>=length) arr.shift()
arr.push(value)
return arr
}
}
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electerious commented Aug 12, 2017 •
edited
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Example:

const arr = fifo(4)

arr(0) // [ 0 ]
arr(1) // [ 0, 1 ]
arr(2) // [ 0, 1, 2 ]
arr(3) // [ 0, 1, 2, 3 ]
arr(4) // [ 1, 2, 3, 4 ]
arr(5) // [ 2, 3, 4, 5 ]
arr() // [ 2, 3, 4, 5 ]

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