bidirectional

I am currently in need of a performant bidirectional map. In Swift, a dictionary can be reversed, however, that will return a tuple of the types it is made of, not a counterpart dictionary. Is there a library for that or does someone have ideas on how to address this issue? Thanks With Swift 4 you could easily make your own using a generic struct: struct BidiMap<F:Hashable,T:Hashable> { private var _forward : [F:T]? = nil private var _backward : [T:F]? = nil var forward:[F:T] { mutating get { _forward = _forward ?? [F:T](uniqueKeysWithValues:_backward?.map{($1,$0)} ?? [] ) return _forward! }

Taking Ryan Bates' asciicast as an example: http://asciicasts.com/episodes/163-self-referential-association He ends with two associations of User :friends :inverse_friends Given that a user would not care who instigated the friendship, you would want a User association that was simply :friends that consisted of both relationships. i.e Relationships instigated by the user and relationships instigated by the user's friend. So how can you achieve this bidirectional self-referential association? UPDATE - Josh Susser has a post about this here: http://blog.hasmanythrough.com/2006/4/21/self

If I want to do bi-directional mapping, do I need to create two mapping? Mapper.CreateMap<A, B>() and Mapper.CreateMap<B, A>() ? Yes, because if you change the type of some property (for example DateTime -> string) it is not bidirectional (you will need to instruct Automapper how to convert string -> DateTime). Yes, but if you find yourself doing this often: public static class AutoMapperExtensions { public static void Bidirectional<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression) { Mapper.CreateMap<TDestination, TSource>(); } } then: Mapper.CreateMap<A, B>()

I am working with graphs in R. I am currently using igraph and I would like to be able to plot bidirectional edges "reciprocal edges" of a graph. So far I've seen it is possible to plot "bidirectional" graphs but not reciprocal edges, for example: E(1,3) and E(3,1) could potentially be represented as a bidirectional edge <-->, but instead I would like to plot two parallel edges one pointing to the opposite direction of the other || . There exist in Rgraphviz an option when plotting "plot(rEG, recipEdges = "distinct")" that makes this, but I like more how plots look like on igraph. Thanks in

I'm doing text tagger using Bidirectional dynamic RNN in tensorflow. After maching input's dimension, I tried to run a Session. this is blstm setting parts: fw_lstm_cell = BasicLSTMCell(LSTM_DIMS) bw_lstm_cell = BasicLSTMCell(LSTM_DIMS) (fw_outputs, bw_outputs), _ = bidirectional_dynamic_rnn(fw_lstm_cell, bw_lstm_cell, x_place, sequence_length=SEQLEN, dtype='float32') and this is runing part: with tf.Graph().as_default(): # Placehoder Settings x_place, y_place = set_placeholder(BATCH_SIZE, EM_DIMS, MAXLEN) # BLSTM Model Building hlogits = tf_kcpt.build_blstm(x_place) # Compute loss loss = tf

I just tried to bind a Integer and a String property. After some googling this should be possible with one of the two provided methods: public static void bindBidirectional(Property stringProperty, Property otherProperty, StringConverter converter) public static void bindBidirectional(Property stringProperty, Property otherProperty, java.text.Format format) Unluckily this does not seem to work for me. What am I doing wrong? import java.text.Format; import javafx.beans.binding.Bindings; import javafx.beans.property.SimpleIntegerProperty; import javafx.beans.property.SimpleStringProperty; import