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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Array 객체의 메서드 사용하기</title>
<link rel="stylesheet" href="style_js.css">
<body>
<script>
let a1 = [0, 1, 2, 3, 4];
let a2 = new Array(9, 8, 7, 6, 5);
document.write(`a1 = [${a1}]<br>`);
document.write(`a2 = [${a2}]<hr>`);
document.write(`a1.concat(a2) : ${a1.concat(a2)}<hr>`);
function gt(e) { return(e >= 7) };
document.write(`a2.filter(gt) : ${a2.filter(gt)}<hr>`);
document.write(`a2.indexOf(6) : ${a2.indexOf(6)}<hr>`);
a2.push(4);
document.write(`a2.push(4) : ${a2}<hr>`);
a2.pop();
document.write(`a2.pop() : ${a2}<hr>`);
document.write(`a1.reverse() : ${a1.reverse()}<hr>`);
a2.shift();
document.write(`a2.shift() : ${a2}<hr>`);
a2.unshift(9);
document.write(`a2.unshift(9) : ${a2}<hr>`);
document.write(`a2.slice(1,4) : ${a2.slice(1,4)}<hr>`);
document.write(`a2.sort() : ${a2.sort()}<hr>`);
document.write(`a2.join("+") : ${a2.join("+")}`);
</script>
</body>
</html>
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