使用JavaScript过滤器功能时使用通配符

Question

I have an array of objects in which I need to do wildcard filtering. For example, my object might contain something like this:

var a = [  
   {  
      "type":"metals",
      "SN":"SN0000000000"

   },
   {  
      "type":"wood",
      "SN":"SN0000000001"
   }
];

My filtering function for normal criteria would be something like:

  var filtered = a.filter(function(el) {
      //normal checkbox criteria filter for selectedtype
      if(!(self.serialno)){
        return el.type == self.selectedType
      }
      //wildcard text filtering from textfield
      else{
       return typeof el.SN == self.serialno;
      }
    });

And printing out of results would be something like:

console.log(filtered);

For normal criteria filter ("type") in which i'm using checkbox criteria selection , I'm able to get my selected criteria type back(as an array of objects), but in the case of "SN" in which invokes text-based wildcard search , I'm unable to do so.

For example, If I were to key in "00" in my wildcard textfield, the function supposed to return an array of objects in which "SN/serialNo" contains "00" (in the example above, both objects in var a ).

PS:

self.serialno is a string that is retrieved from the textbox.

el.SN is the array of objects returned from the filter function.

Update:

running this code:

console.log(self.serialno.test(el.SN));

returns me :

Answer 1

As far as I understand from your question you el.SN is a string representing a set of serial number conform to a regular expression. If so you can use the test function which is aimed at testing the invoking string against a regular expression passed as parameter.

  var patt = new RegExp(self.serialno);
  if(patt.test(el.SN)){ return el; }

returns true if self.serialno match with the regular expression el.SN

You say el.SN is the result of the javascript filter function. I think however the filtered variable contains the result of that function.

el.SN is rather a property of a parameter ( el ) passed to the function used to filter the array a .