Created
March 27, 2017 09:08
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Merge Sort
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let mergeSort = (arr) => { | |
if (arr.length < 2) { | |
console.log("Merging len 1: ", arr); | |
return arr; | |
} | |
console.log("Merging len > 1: ", arr) | |
let mid = parseInt(arr.length / 2), | |
l = arr.slice(0, mid), | |
r = arr.slice(mid); | |
console.log([mid, l, r]); | |
return merge(mergeSort(l), mergeSort(r)); | |
} | |
let merge = (l, r) => { | |
let res = []; | |
while (l.length && r.length) { | |
l[0] <= r[0] ? res.push(l.shift()) : res.push(r.shift()); | |
} | |
while (l.length) res.push(l.shift()); | |
while (r.length) res.push(r.shift()); | |
console.log("Merged: ", res); | |
return res; | |
} | |
input = [3,4,5,6,1,2]; | |
console.log(input); | |
output = mergeSort(input); | |
console.log(output); |
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