Flutter——数组以符号隔开转字符串

///数组转字符串
  String getTaskScreen(List list){
    List tempList = List();
    String str = '';
    list.forEach((f){
      tempList.add(f.title);
    });

    tempList.forEach((f){
      if(str == ''){
        str = "$f";
      }else {
        str = "$str"",""$f";
      }
    });

    return str;
  }

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