​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 数组</h1>
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<p>请避免使用 new Array()。</p>
​
<p id="demo"></p>
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<script>
var points = new Array(40);
document.getElementById("demo").innerHTML = points[0];  
</script>
​
</body>
</html>
​