map

问题 i'm using tileMill for creating offline map for my iPhone app, long story short - i've downloaded OSM data for Ukraine region from here. I've checked that online map(from link) is showing building numbers as you can see in picture: but after importing data, that i've download, to tile mill there's no building numbers: any idea why this is happening? Thanks! EDIT: I figure out how to set up house numbers label, but when i'm importing data to tilemill (with this tutorial) i can't find layer

问题 Is there a more streamlined way to do the following? Map<String, String> map = new HashMap<String, String>(); map.put("a", "apple"); map.put("b", "bear"); map.put("c", "cat"); I'm looking for something closer to this. Map<String, String> map = MapBuilder.build("a", "apple", "b", "bear", "c", "cat"); 回答1: No, there isn't, but I wrote a method to do exactly this, inspired by Objective-C NSDictionary class: public static Map<String, Object> mapWithKeysAndObjects(Object... objects) { if (objects

问题 BACKGROUND Per the Coastal Information Data Program (CDIP), they are generating a spectral heat/intensity map for wave swell at http://cdip.ucsd.edu/?nav=recent&sub=observed&units=metric&tz=UTC&pub=public&map_stati=1,2,3&stn=100&stream=p1&xitem=dir_spectrum. This is dynamically generated with data containing energy density, duration (in seconds) & direction (in degrees with 180 degrees representing south). DATA SAMPLE Here's an explanation of the data: http://cdip.ucsd.edu/data_access/MEM

问题 I've got three (relevant) models, specified like this: class User < ActiveRecord::Base has_many :posts has_many :comments has_many :comments_received, :through => :posts, :source => :comments end class Post < ActiveRecord::Base belongs_to :user has_many :comments end class Comment < ActiveRecord::Base belongs_to :user belongs_to :post end I'd like to be able to reference all the comments_received for a user with a route - let's say it's for batch approval of comments on all posts. (note that

问题 In researching how to do Memoization in Scala, I've found some code I didn't grok. I've tried to look this particular "thing" up, but don't know by what to call it; i.e. the term by which to refer to it. Additionally, it's not easy searching using a symbol, ugh! I saw the following code to do memoization in Scala here: case class Memo[A,B](f: A => B) extends (A => B) { private val cache = mutable.Map.empty[A, B] def apply(x: A) = cache getOrElseUpdate (x, f(x)) } And it's what the case class

问题 I am new to Pig and I want to convert a bag of tuples to a map with specific value in each tuple as key. Basically I want to change: {(id1, value1),(id2, value2), ...} into [id1#value1, id2#value2] I've been looking around online for a while, but I can't seem to find a solution. I've tried: bigQMap = FOREACH bigQFields GENERATE TOMAP(queryId, queryStart); but I end up with a bag of maps (e.g. {[id1#value1], [id2#value2], ...} ), which is not what I want. How can I build up a map out of a bag

问题 After searching through the JPA docs and various posts, I'm confused as to whether the following is possible with JPA2.0. I'm just starting out with JPA so excuse me if I'm doing something stupid, My domain model has a "Portfolio", which contains zero or more "open positions". A position consists of an "Instrument" (which is a JPA Entity) and a price (double). The portfolio is as follows: @Entity (name = "portfolio") public class Portfolio { @Id @Column (name = "id") @GeneratedValue private

问题 Would like to know what is proper way to get ETA (estimated time arrival) from any location to my current location, in consideration the following situation: a. ex. - I got from another device its location (lon/lat) and want to when the other person will pick me up... In this case what web-service can I use to get this info for the user? Does mapkit provides that kind of option? b. In case it will be done on the server-side and I'll just send my user location, what are the tools my server

问题 I'm trying to work out from the Leaflet.js docs how it would be possible to open more than one popup upon showing the page. For instance, if one had three markers (each representing a building), each one would have their popup opened immediately. http://leaflet.cloudmade.com/reference.html#popup cryptically says: "Use Map#openPopup to open popups while making sure that only one popup is open at one time (recommended for usability), or use Map#addLayer to open as many as you want." but http:/

问题 I currently have this piece of code: Map<Double, Character> memory = new HashMap<Double, Character>(); However it returns this error upon compiling: GameLogic.java:5: type Map does not take parameters Map<Double, Character> memory = new HashMap<Double, Character>(); ^ 1 error I have no idea why its doing this as I see no reason it should after looking at other questions. It is within the 'GameLogic' class. Please could someone help. 回答1: Two possible mistakes: You are using JKD 1.4 You