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join用の配列を作らずに文字列をjoinする

Posted at 2012-05-04

joinを直書きすれば変数は戻り値だけになる

data=["あ","い","う"];
res="";join=" ";
for(i=0;i<data.length;i++){
	res+=(res!="")?join:"";
	res+=data[i];
}
res;