in java/src/main/java/com/aliyun/darabonba/array/Client.java [45:57]
public static String join(List<String> raw, String sep) {
if (null == raw || sep == null) {
throw new IllegalArgumentException("not a valid value for parameter");
}
if (raw.size() > 0) {
String result = raw.get(0);
for (int i = 1; i < raw.size(); i++) {
result = result + sep + raw.get(i);
}
return result;
}
return raw.toString();
}