艦隊数対応したら結果に重複が生じたので重複判定処理書いたら94行目で"Cannot read property '0' of undefined"エラー('A`)

ensei_test.js

//ここをかえます
var oil = 10; 	//さいていげんほしい燃料
var bullet = 0;//さいていげんほしい弾薬
var steel = 10; //さいていげんほしい鋼材
var bauxite =10;//さいていげんほしいボーキ

var bucket = 0; //さいていげんほしいばけつ

var kantai = 2;	//かいほうしてるかんたいのかず
//ここまでをかえます

//燃料、弾薬、鋼材、ボーキの順
var dataset = [
	[-32,120,0,0],
	[-56,200,60,0],
	[54,34,120,0],
	[-31.2,72,0,0],
	[111.67,133.33,13.33,13.33],
	[-24,-24,0,120],
	[-42,0,50,30],
	[2.67,25.33,16.67,16.67],
	[79.25,0,0,0],
	[-12,33.33,0,20],
	[-5.6,0,0,50],
	[2.75,31.25,25,6.25],
	[48.25,62.5,0,0],
	[-7.83,40,33.33,0],
	[-5.17,-5,25,33.33],
	[30.2,30,13.33,13.33],
	[57.33,26.67,66.67,0],
	[-14.4,-6.6,60,20],
	[46.33,-19.33,8.33,5],
	[-8.5,-9,75,0],
	[109.71,89.57,0,0],
	[-33.33,-36,0,0],
	[-50,-53,0,25],
	[0,0,0,0],
	[16.15,-3.4,7.5,0],
	[-0.9,-1,0,11.25],
	[-0.8,-1.6,40,0],
	[-0.96,-1.92,36,14],
	[-1,-2,0,4.16],
	[-1,-2,0,2.08],
	[0,0,0,0],
	[0,0,0,0],
	[0,0,0,0],
	[-17.71,-22.29,34.29,40],
	[40.44,-13.78,22.22,22.22],
	[-27.64,107.64,98.18,0],
	[119.31,-32.91,68.57,0]
];
//バケツ
var bucketSet = [
	0,1,0,0.6,0,0,0,0,0.375,0.333,0.2,0,0.25,0.083,0,0,0,0.1,0,0,0,0,0,0,0.019,0,0,0,0,0,0,0,0,0,0.111,0,0
];

var result = []; //さいていげんをみたしたくみあわせのけいさんけっかがはいる

for (var i = 0; i < dataset.length-2; i++) {
	for (var j = i+1; j < dataset.length-1; j++) {
		for (var k = j+1; k < dataset.length; k++) {
			var resources = [0,0,0,0];
			var buckets = 0;
			//しげんけいさん
			for (var l = 0; l < 4; l++){
				resources[l] += dataset[i][l];
				resources[l] += kantai>=2 ? dataset[j][l] : 0;
				resources[l] += kantai==3 ? dataset[k][l] : 0;
				resources[l] = Math.floor(resources[l] * 100) / 100;
			}
			//ばけつけいさん
			buckets = bucketSet[i]+bucketSet[j]+bucketSet[k];
			buckets = Math.floor(buckets * 100) / 100;
			//ぼーだーらいんかくにん
			if(resources[0] < oil || resources[1] < bullet || resources[2] < steel || resources[3]< bauxite)
				continue;
			if(buckets < bucket)
				continue;
			//けっかにつっこむ
			resources.unshift((i+1) + (kantai>=2 ? "+"+(j+1) : "") + (kantai==3 ? "+"+(k+1) : ""));
			resources.push(buckets);
			result.push(resources);
			if(kantai==3)
				break;
		}
		if(kantai>=2)
			break;
	}
}

//重複削除
for(var i = 0; i < result.length-1; i++){
	for(var j = i+1; j < result.length; j++){
		if(result[i][0]==result[j][0])
			result[j] = undefined;
	}
}
//                 if(result[i][0]==result[j][0])
//                             ^
// TypeError: Cannot read property '0' of undefined

//ソート
for(var i = 0; i < result.length; i++)
	result[i].push(result[i][1]+result[i][2]+result[i][3]+result[i][4]);
for(var i = 0; i < result.length-1; i++){
	for(var j = i+1; j < result.length; j++){
		if(result[i][6]<result[j][6]){
			tmp = result[i];
			result[i] = result[j];
			result[j] = tmp;
		}
	}
}

//ひょうじ
console.log("組み合わせ 燃料　弾薬 鋼材 ボーキ バケツ 資源合計");
for(var i = 0; i < result.length; i++){
	if(result[i]==undefined)
		continue;
	console.log(result[i].join('\t'));
}
console.log(result.length+"件");