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Created April 19, 2014 18:58
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Javascript: Insertion Sort
/*
Insertion Sort in a traditional way
Practical Example: Sorting a pack of cards in hand from left to right.
Pick up 2nd card, compare with 1st card.
Pick up 3rd card, compare with 2nd card and 1st card.
And so on...
*/
function insertionSort(arr){
// arr = [10,43,-4,3,9,65,-35,8]
for (var i = 1; i < arr.length; i++) {
var inHand = arr[i],
temp;
for (var j = i - 1; j >= 0; j--) {
if (inHand < arr[j]) {
temp = arr[j];
arr[j] = inHand;
arr[j+1] = temp;
};
};
// arr[j] = inHand;
};
return arr;
}
/*
Insertion Sort in a smarter form.
*/
function insertionSortAlt(arr) {
for (var i = 1; i < arr.length; i++) {
var inHand = arr[i];
for (var j = i; j > 0 && inHand < arr[j-1] ; j--) {
a[j] = a[j - 1];
};
a[j] = inHand;
};
return arr;
}
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