findProperties method

List<GeoJSONFeature> findProperties(String property, String value, { bool contains = false, })

Finds all features where the specified property matches the given value.

This method will iterate over all features in the collection and check if the provided property exists and matches the specified value.

If the contains argument is set to true, the method will find all features where the property contains the specified value, instead of exactly matching it.

Returns a list of all features that match the criteria.

Example:

var foundFeatures = featureCollection.findProperties('name', 'na', contains: true);
print('Found ${foundFeatures.length} feature(s) with name containing "na".');

property: The property to match. value: The value to match. contains: Whether to look for a partial match (default is false).

Implementation

List<GeoJSONFeature> findProperties(String property, String value,
    {bool contains = false}) {
  List<GeoJSONFeature> foundFeatures = [];

  for (var feature in features) {
    var properties = feature?.properties;

    if (properties != null && properties.containsKey(property)) {
      if (contains) {
        if (properties[property].toString().contains(value)) {
          foundFeatures.add(feature!);
        }
      } else {
        if (properties[property].toString() == value) {
          foundFeatures.add(feature!);
        }
      }
    }
  }
  return foundFeatures;
}