Ways to refine data using multiple criteria

Question

Ways to refine data using multiple criteria

I have a list of alarm data that I need to filter based on specific conditions. If there are multiple alarms of type "pull_Alarm" and "emergency_alarm" in the same location, I want to prioritize the "emergency_alarm".

Here is my list:
    [
        {
            alarmType:"Normal_ALARM"
            location:"Ward5"
            severity:"URGENT"
        },
        {
            alarmType:"Emergency_Alarm
            location:"Ward1"
            severity:"URGENT"
        },
        {
            alarmType:"PULL_Alarm"
            location:"Ward1"
            severity:"NORMAL"
        }
    ]

The desired filtered list should look like this:

[
      {
        alarmType:"Normal_ALARM"
        location:"Ward5"
        severity:"URGENT"
      },
      {
        alarmType:"Emergency_Alarm
        location:"Ward1"
        severity:"URGENT"
      }
    ]

If anyone has any suggestions on how to apply these filters, please let me know.

javascript angularjs

Answer 1

Answer №1

Implement a filter using switch cases or if-else conditions.

.filter("alarmFilter", function () {
    // Specify the desired condition here
});

Then, use this filter in your expression to apply the specified condition.

Answer 2

Implement a filter using switch cases or if-else conditions.

.filter("alarmFilter", function () {
    // Specify the desired condition here
});

Then, use this filter in your expression to apply the specified condition.

Answer 3

Answer №2

Create a custom filter

$scope.filter1 = function(item)
    {
        return (item.severity == 'URGENT');
    };

Implement the custom filter

<div ng-repeat="item in object| filter:filter1">{{item.alarmType}}</div>

Check it out on JSFIDDLE http://jsfiddle.net/Lvc0u55v/8866/

Answer 4

Create a custom filter

$scope.filter1 = function(item)
    {
        return (item.severity == 'URGENT');
    };

Implement the custom filter

<div ng-repeat="item in object| filter:filter1">{{item.alarmType}}</div>

Check it out on JSFIDDLE http://jsfiddle.net/Lvc0u55v/8866/

Answer 5

Answer №3

To customize the filtering process, follow the steps outlined below.

angular.module('myFilters', []).
filter('byAlarmCount', function() {
  return function(alarms, severity) {
    var items = {
      severity: severity,
      out = []
    };
    angular.forEach(alarms, function(v, k)) {
        if (this.severity[v.severity] === true) {
          this.out.push(v);
        }
    }
    return items.out;
  }
});

The DOM structure is as follows:

<ul>
    <li ng-repeat="alarm in list | byAlarmCount:severityFilter">{{alarm.location}: {{alarm.alarmType}}</li>
</ul>

Answer 6

To customize the filtering process, follow the steps outlined below.

angular.module('myFilters', []).
filter('byAlarmCount', function() {
  return function(alarms, severity) {
    var items = {
      severity: severity,
      out = []
    };
    angular.forEach(alarms, function(v, k)) {
        if (this.severity[v.severity] === true) {
          this.out.push(v);
        }
    }
    return items.out;
  }
});

The DOM structure is as follows:

<ul>
    <li ng-repeat="alarm in list | byAlarmCount:severityFilter">{{alarm.location}: {{alarm.alarmType}}</li>
</ul>

Answer 7

Answer №4

If you are in need of performing intricate filtering tasks, it is advisable to explore third-party JavaScript libraries such as lodash (https://lodash.com/) or Underscore (http://underscorejs.org/).

These libraries offer a multitude of tools that can assist with filtering, mapping, and various other commonly used utility operations.

For instance, in the current context, you could utilize _.where / _.filter from underscorejs.

var filteredData = _.where(<YOUR DATA SOURCE>, { property: VALUE, ...});

Answer 8

If you are in need of performing intricate filtering tasks, it is advisable to explore third-party JavaScript libraries such as lodash (https://lodash.com/) or Underscore (http://underscorejs.org/).

These libraries offer a multitude of tools that can assist with filtering, mapping, and various other commonly used utility operations.

For instance, in the current context, you could utilize _.where / _.filter from underscorejs.

var filteredData = _.where(<YOUR DATA SOURCE>, { property: VALUE, ...});

Ways to refine data using multiple criteria

Answer №1

Answer №2

Answer №3

Answer №4

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