javascript - 只要找到相似的条目，它就应该增加

Question

for(var i= 0; i < foundRecords.length ; i++){
  var MaleChildNew=0,
      MaleNew=0, 
      femaleChildNew=0, 
      femaleNew=0, 
      policeMaleChildNew = 0, 
      policefemaleChildNew=0, 
      policeMaleNew=0, 
      policefemaleNew=0, 
      npoliceMaleChildNew=0, 
      npoliceMaleNew=0, 
      npolicefemaleChildNew=0, 
      npolicefemaleNew=0;
      if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
      policeMaleChildNew++;
      }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
      policefemaleChildNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
      policeMaleNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
      policefemaleNew++;
      } if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
                    npoliceMaleChildNew++;
                }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
                    npolicefemaleChildNew++;
                }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
                    npoliceMaleNew++;
                }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
                    npolicefemaleNew++;
                } if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
                    MaleChildNew++;
                }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
                    femaleChildNew++;
                }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
                    MaleNew++;
                }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
                    femaleNew++;
                }
            }

问题是它只增加在数据库末尾找到的类别并返回 1。我想要的是它应该为它发现的每个相似条目增加值并保存该值。但此代码对于所有其他变量返回 0，对于位于数据库末尾的变量返回 1。

Answer 1

您的代码将始终将变量初始化为 0，因为它们位于 for 循环内。因此，foundRecords 的每一项变量都重置为 0。因此，在 for 循环之外声明变量:

var MaleChildNew=0,
    MaleNew=0, 
    femaleChildNew=0, 
    femaleNew=0, 
    policeMaleChildNew = 0, 
    policefemaleChildNew=0, 
    policeMaleNew=0, 
    policefemaleNew=0, 
    npoliceMaleChildNew=0, 
    npoliceMaleNew=0, 
    npolicefemaleChildNew=0, 
    npolicefemaleNew=0;

for(var i= 0; i < foundRecords.length ; i++){
      if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
      policeMaleChildNew++;
      }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
      policefemaleChildNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
      policeMaleNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
      policefemaleNew++;
      } if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
                    npoliceMaleChildNew++;
      }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
          npolicefemaleChildNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
          npoliceMaleNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
          npolicefemaleNew++;
      } if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
          MaleChildNew++;
      }else if(foundRecords[i]['age'] <= 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
          femaleChildNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'male' && foundRecords[i]['opdType'] == 'new' ){
          MaleNew++;
      }else if(foundRecords[i]['age'] > 12 && foundRecords[i]['patientType'] == 'policePerson' && foundRecords[i]['sex'] == 'female' && foundRecords[i]['opdType'] == 'new' ){
          femaleNew++;
      }
}