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Fixed Vector.insert when index of new element is less than first element #143

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Apr 9, 2015
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Fixed Vector.insert when index of new element is less than first element #143

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5 changes: 5 additions & 0 deletions lib/vector.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,11 @@ lunr.Vector.prototype.insert = function (idx, val) {
return this.length++
}

if (idx < list.idx) {
this.list = new lunr.Vector.Node (idx, val, list)
return this.length++
}

var prev = list,
next = list.next

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12 changes: 12 additions & 0 deletions test/vector_test.js
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Expand Up @@ -37,3 +37,15 @@ test("calculating the similarity between two vectors", function () {
equal(roundedSimilarity, 0.111)
})

test("inserted elements are kept in index order", function () {
var vector = new lunr.Vector,
elements = [6,5,4]

vector.insert(2, 4)
vector.insert(1, 5)
vector.insert(0, 6)

equal(vector.list.idx, 0)
equal(vector.list.next.idx, 1)
equal(vector.list.next.next.idx, 2)
})