Tips on creating several conditions within a single filter

Currently, I am developing a filter system that is based on checkboxes.

However, I am facing an issue where the JavaScript seems to ignore other conditions within the filter function when one condition is active.

filterData() {
  return this.airlines.filter(x => {
    if (this.filters.options.length != 0 || this.filters.airlines.length != 0) {
      for (let i = 0; this.filters.options.length > i; i++) {

        if (this.filters.options[i] == 0) {
          return x.itineraries[0][0].stops == 0;
        }

        if (this.filters.options[i] == 1) {

          return x.itineraries[0][0].segments[0].baggage_options[0].value > 0;
        }
      }
    } else {
      return x;
    }
  })
}

Although I understand that the "return" statement will stop the current loop, I'm struggling to find a way to address this problem effectively. Any suggestions?

javascriptvue.jsvuejs2

Answer №1

Update-1: (Filtering records based on checked cases)

Instead of using a for loop and multiple conditions in a single return statement, utilize && for if conditions and || for data conditions:

var chbox = this.filters.options;
return $.inArray(0, chbox) != -1 && x.itineraries[0][0].stops == 0 
    || $.inArray(1, chbox) != -1 && x.itineraries[0][0].segments[0].baggage_options[0].value > 0;

Hope this explanation is helpful!

The $.inArray(value, arr) method will validate each checkbox and handle every checked one.

Update-2 (Filtering records based on checked cases AND condition)

Per the comment below, if you are using checkboxes on demand, consider the following code:

var chbox = this.filters.options;
boolean condition = true; 
if ($.inArray(0, chbox) != -1) {
   conditon = conditon && x.itineraries[0][0].stops == 0;
}

if ($.inArray(1, chbox) != -1) {
   conditon = conditon && x.itineraries[0][0].segments[0].baggage_options[0].value > 0;
}

return condition;

Answer №2

Your filter function is currently returning an object instead of a boolean value, which is not ideal. It would be best to refactor the code as shown below.

updateFilter() {
  return this.airlines.filter(item => {
    let isValid = false;

    if (this.filters.options.length !== 0 || this.filters.airlines.length !== 0) {
      for (let j = 0; this.filters.options.length > j; j++) {
        if (this.filters.options[j] === 0) {
          isValid = item.itineraries[0][0].stops === 0;
          break;
        } else if (this.filters.options[j] === 1) {
          isValid = item.itineraries[0][0].segments[0].baggage_options[0].value > 0;
          break;
        }
      }
    }

    return isValid;
  })
}

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