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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数组</h1>
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<p>添加具有高索引的元素可以在数组中创建未定义的“孔”。</p>
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<p id="demo"></p>
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<script>
var fruits, text, fLen, i;
fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits[6] = "Lemon";
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fLen = fruits.length;
text = "";
for (i = 0; i < fLen; i++) {
  text += fruits[i] + "<br>";
}
document.getElementById("demo").innerHTML = text;
</script>
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</body>
</html>
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