Question

我得到响应的数组，我必须获取数组中存在的一些变量，并将其存储在手机的本地数据库中，当应用启动时，我必须检查数据库是否存在。

> wc junk
     193    1042   11312 junk
> junk.pl junk
you counted 193 lines. Now do you want to proceed?yes
answer=yes
you said yes so we do something affirmative
> junk.pl junk
you counted 193 lines. Now do you want to proceed?no
answer=no
you said no which is not "yes" so we do NOT proceed
> cat junk | junk.pl
Use of uninitialized value $answer in scalar chomp at /Users/BNW/u/kh/bin/junk.pl line 10.
Use of uninitialized value $answer in concatenation (.) or string at /Users/BNW/u/kh/bin/junk.pl line 11.
answer=
Use of uninitialized value $answer in string eq at /Users/BNW/u/kh/bin/junk.pl line 12.
Use of uninitialized value $answer in concatenation (.) or string at /Users/BNW/u/kh/bin/junk.pl line 18.
you said  which is not "yes" so we do NOT proceed
you counted 193 lines. Now do you want to proceed?>

这是我用来访问URL的代码段

Unitdata unitdata1 = new Unitdata(univ_year_semid:"18",semid: "2");
await _networkUtils.unitdata("http://hiddenmasterminds.com/web/index.php?r=jguest/allstudentsemdata",body: unitdata1.toMap());

这是用于存储URL的代码段，现在我必须在主题数组中存储一些变量。

class Unitdata{
  final String univ_year_semid;
  final String semid;
  List subject, unit, topic;

  Unitdata({this.univ_year_semid,this.semid});

  factory Unitdata.fromJson(Map<List ,dynamic> json){
    return Unitdata(

      univ_year_semid: json['univ_year_sem_id'],
      semid: json['sem_id']
    );
  }
  Map toMap() {
    var map =  new Map<List,dynamic>();
    map[subject] = subject;
    map[unit]= unit;
    map[topic] = topic;
    return map;
  }
}

这是用于创建数据库的代码

如何从响应数组中的抖动中提取变量？

0 个答案: