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<h1>JavaScript 数组方法</h1>
<p>当需要一个简单的值时，JavaScript 会自动将数组转换为逗号分隔的字符串：</p>
<p id="demo"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits;
</script>
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