javascript - 如何检查 json 数组的某个键是否具有特定值？ Angular JS

Question

 test_array = [  {"id":1,"title":"test1","type":"A"  },  
                 {"id":2,"title":"test2","type":"B"  },  
                 {"id":3,"title":"test3","type":"A"  },
              ]


var x= test_array.isContain("type"=="B") 

我想要一个像上面所述的方法并获得返回值

Answer 1

你可以这样做:

test_array = [  {"id":1,"title":"test1","type":"A"  },  
                 {"id":2,"title":"test2","type":"B"  },  
                 {"id":3,"title":"test3","type":"A"  },
              ]

Array.prototype.isExist = function(key, value){ 
      return this.some(function(obj){ 
          return obj[key] === value;
      });
};

test_array.isExist('type', 'B');