Dart DocumentationbotCollectionUtil

CollectionUtil class

class CollectionUtil {
  static bool allUnique(List items) {
    requireArgumentNotNull(items, 'items');

    for(int i = 0; i < items.length; i++) {
      for(int j = i + 1; j < items.length; j++) {
        if(items[i] == items[j]) {
          return false;
        }
      }
    }
    return true;
  }

  static Object aggregate(Iterable source, Object seed, Func2 func) {
    requireArgumentNotNull(source, 'source');
    requireArgumentNotNull(func, 'func');

    for (final Object local in source) {
      seed = func(seed, local);
    }

    return seed;
  }
}

Static Methods

bool allUnique(List items) #

static bool allUnique(List items) {
  requireArgumentNotNull(items, 'items');

  for(int i = 0; i < items.length; i++) {
    for(int j = i + 1; j < items.length; j++) {
      if(items[i] == items[j]) {
        return false;
      }
    }
  }
  return true;
}

Object aggregate(Iterable source, Object seed, Func2 func) #

static Object aggregate(Iterable source, Object seed, Func2 func) {
  requireArgumentNotNull(source, 'source');
  requireArgumentNotNull(func, 'func');

  for (final Object local in source) {
    seed = func(seed, local);
  }

  return seed;
}

Properties

final Type runtimeType #

inherited from Object

A representation of the runtime type of the object.

external Type get runtimeType;

Operators

bool operator ==(other) #

inherited from Object

The equality operator.

The default behavior for all Objects is to return true if and only if this and other are the same object.

If a subclass overrides the equality operator it should override the hashCode method as well to maintain consistency.

bool operator ==(other) => identical(this, other);

Methods

int hashCode() #

inherited from Object

Get a hash code for this object.

All objects have hash codes. Hash codes are guaranteed to be the same for objects that are equal when compared using the equality operator ==. Other than that there are no guarantees about the hash codes. They will not be consistent between runs and there are no distribution guarantees.

If a subclass overrides hashCode it should override the equality operator as well to maintain consistency.

external int hashCode();

noSuchMethod(String name, List args) #

inherited from Object

noSuchMethod is invoked when users invoke a non-existant method on an object. The name of the method and the arguments of the invocation are passed to noSuchMethod. If noSuchMethod returns a value, that value becomes the result of the original invocation.

The default behavior of noSuchMethod is to throw a noSuchMethodError.

external Dynamic noSuchMethod(String name, List args);

const Object() #

inherited from Object

Creates a new Object instance.

Object instances have no meaningful state, and are only useful through their identity. An Object instance is equal to itself only.

const Object();

String toString() #

inherited from Object

Returns a string representation of this object.

external String toString();