為什么slice（-1）輸出的是數(shù)組第一個值呢
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array對象 </title>
<script type="text/javascript">
? ?var myarr1= ["我","愛","你"];
? ?document.write(myarr1.slice(1)+"<br>");
? ?document.write(myarr1.reverse()+"<br>");
? ?document.write(myarr1.slice(-1)+"<br>");
</script>
</head>
<body>
</body>
</html>
2018-03-13
myarr1.reverse()已經(jīng)將數(shù)組順序調(diào)換了，這個時候你的myarr1=["你"，"愛","我"]