配列要素を結合／分割するには

onClipEvent(load){
ary1 = ["AB","CD","EF"];
ary2 = ["GH","IJ","KL","MN"];
ary3 = ["OP","QR"];
ary = ary1.concat(ary2,ary3);
_root.result1.text = ary;
str = ary1.join("-");
_root.result2.text = str;
str = ary2.slice(1,3);
_root.result3.text = str;
str = ary2.splice(1,2,"ST","UV");
_root.result4.text = ary2;
_root.result5.text = str;
}

・サンプルを実行
・サンプルをダウンロード

　説明などは本書を参考にしてください。