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Exploring bucket sort in JavaScript.
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// InsertionSort to be used within bucket sort | |
function insertionSort(array) { | |
var length = array.length; | |
for(var i = 1; i < length; i++) { | |
var temp = array[i]; | |
for(var j = i - 1; j >= 0 && array[j] > temp; j--) { | |
array[j+1] = array[j]; | |
} | |
array[j+1] = temp; | |
} | |
return array; | |
} | |
// Implement bucket sort | |
function bucketSort(array, bucketSize) { | |
if (array.length === 0) { | |
return array; | |
} | |
// Declaring vars | |
var i, | |
minValue = array[0], | |
maxValue = array[0], | |
bucketSize = bucketSize || 5; | |
// Setting min and max values | |
array.forEach(function (currentVal) { | |
if (currentVal < minValue) { | |
minValue = currentVal; | |
} else if (currentVal > maxValue) { | |
maxValue = currentVal; | |
} | |
}) | |
// Initializing buckets | |
var bucketCount = Math.floor((maxValue - minValue) / bucketSize) + 1; | |
var allBuckets = new Array(bucketCount); | |
for (i = 0; i < allBuckets.length; i++) { | |
allBuckets[i] = []; | |
} | |
// Pushing values to buckets | |
array.forEach(function (currentVal) { | |
allBuckets[Math.floor((currentVal - minValue) / bucketSize)].push(currentVal); | |
}); | |
// Sorting buckets | |
array.length = 0; | |
allBuckets.forEach(function(bucket) { | |
insertionSort(bucket); | |
bucket.forEach(function (element) { | |
array.push(element) | |
}); | |
}); | |
return array; | |
} |
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