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  • Pattern matching against Scala Map type

    - by Tom Morris
    Imagine I have a Map[String, String] in Scala. I want to match against the full set of key–value pairings in the map. Something like this ought to be possible val record = Map("amenity" -> "restaurant", "cuisine" -> "chinese", "name" -> "Golden Palace") record match { case Map("amenity" -> "restaurant", "cuisine" -> "chinese") => "a Chinese restaurant" case Map("amenity" -> "restaurant", "cuisine" -> "italian") => "an Italian restaurant" case Map("amenity" -> "restaurant") => "some other restaurant" case _ => "something else entirely" } The compiler complains thulsy: error: value Map is not a case class constructor, nor does it have an unapply/unapplySeq method What currently is the best way to pattern match for key–value combinations in a Map?

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  • java.util.Map with HtmlDataTable

    - by gerry
    Hi, I'm developing an application on GlassFish v3 which uses Suns-RI of JavaEE6 and JSF2.0, etc. And the bad thing is, that no changes/switches away from Suns RI can be made (to use MyFaces or something like that). Now, the problem is, that I want to build HtmlDatatable by hand ( in Java code). The datatable should represent a java.util.Map where the first column should display the key and the second the values of the map. I've build successfully a PanelGrid from a java.util.List and used every time the "setExpressionValue" methods of UIComponent to bind the UI to the underlying List. But now, this doesn't work with the Map. Here is a snippet of my code: public HtmlDataTable getEntityDetailsDataTable() { ... Application app = FacesContext.getCurrentInstance().getApplication(); HtmlDataTable component = (HtmlDataTable)app.createComponent(HtmlDataTable.COMPONENT_TYPE); component.setValueExpression("value", ExpressionUtil.createValueExpression("#{entityTree.entity."+fieldName+".entrySet()}", Map.class)); component.setVar("param"); UIColumn column = new UIColumn(); UIOutput label1 = DynamicHtmlComponentCreator.createHtmlOutputText("#{param[key]}", String.class); column.getChildren().add(label1); UIOutput label2 = DynamicHtmlComponentCreator.createHtmlOutputText("#{param[value]}", String.class); column.getChildren().add(label2); component.getChildren().add(column); ... return component; } component.getChildren().add(column); ... return component; } So, further the problem is, that this code only prints out the content of the Map, on another page I need the values displayed in HtmlInputText elements and the whole map updated if the user clicks a i.e. "Save" button. So, further the problem is, that this code only prints out the content of the Map, on another page I need the values displayed in HtmlInputText elements and the whole map updated if the user clicks a i.e. "Save" button. If there is a workaround, to represent the Map as to Lists...please help me, because for this (map as 2 lists) I've no idea how the underlying map/database model can be updated again. Hopefully, someone can help me....

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  • Python in AWS Elastic Beasntalk: Private package dependencies

    - by Adam Matan
    I would like to deploy a Python Flask application on beanstalk. The application depends on external packages (e.g. geopy) and internal packages (e.g. adam_geography). The manual Create a requirements.txt file and place it in the top-level directory of your source bundle. This would probably fetch geopy and its dependencies, but would not fetch adam_geography which is available from a custom repo inside my VPC. How do I specify/upload private, internal Python package dependencies in a Beanstalk application?

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  • Oracle’s Sun Server X4-8 with Built-in Elastic Computing

    - by kgee
    We are excited to announce the release of Oracle's new 8-socket server, Sun Server X4-8. It’s the most flexible 8-socket x86 server Oracle has ever designed, and also the most powerful. Not only does it use the fastest Intel® Xeon® E7 v2 processors, but also its memory, I/O and storage subsystems are all designed for maximum performance and throughput. Like its predecessor, the Sun Server X4-8 uses a “glueless” design that allows for maximum performance for Oracle Database, while also reducing power consumption and improving reliability. The specs are pretty impressive. Sun Server X4-8 supports 120 cores (or 240 threads), 6 TB memory, 9.6 TB HDD capacity or 3.2 TB SSD capacity, contains 16 PCIe Gen 3 I/O expansion slots, and allows for up to 6.4 TB Sun Flash Accelerator F80 PCIe Cards. The Sun Server X4-8 is also the most dense x86 server with its 5U chassis, allowing 60% higher rack-level core and DIMM slot density than the competition.  There has been a lot of innovation in Oracle’s x86 product line, but the latest and most significant is a capability called elastic computing. This new capability is built into each Sun Server X4-8.   Elastic computing starts with the Intel processor. While Intel provides a wide range of processors each with a fixed combination of core count, operational frequency, and power consumption, customers have been forced to make tradeoffs when they select a particular processor. They have had to make educated guesses on which particular processor (core count/frequency/cache size) will be best suited for the workload they intend to execute on the server.Oracle and Intel worked jointly to define a new processor, the Intel Xeon E7-8895 v2 for the Sun Server X4-8, that has unique characteristics and effectively combines the capabilities of three different Xeon processors into a single processor. Oracle system design engineers worked closely with Oracle’s operating system development teams to achieve the ability to vary the core count and operating frequency of the Xeon E7-8895 v2 processor with time without the need for a system level reboot.  Along with the new processor, enhancements have been made to the system BIOS, Oracle Solaris, and Oracle Linux, which allow the processors in the system to dynamically clock up to faster speeds as cores are disabled and to reach higher maximum turbo frequencies for the remaining active cores. One customer, a stock market trading company, will take advantage of the elastic computing capability of Sun Server X4-8 by repurposing servers between daytime stock trading activity and nighttime stock portfolio processing, daily, to achieve maximum performance of each workload.To learn more about Sun Server X4-8, you can find more details including the data sheet and white papers here.Josh Rosen is a Principal Product Manager for Oracle’s x86 servers, focusing on Oracle’s operating systems and software. He previously spent more than a decade as a developer and architect of system management software. Josh has worked on system management for many of Oracle's hardware products ranging from the earliest blade systems to the latest Oracle x86 servers.

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  • Azure Florida Association: Modern Architecture for Elastic Azure Applications

    - by Herve Roggero
    Join us on November 28th at 7PM, US Eastern Time, to hear Zachary Gramana talk about elastic scale on Windows Azure. REGISTER HERE: https://www3.gotomeeting.com/register/657038102 Description: Building horizontally scalable applications can be challenging. If you face the need to rapidly scale or adjust to high load variations, then you are left with little choice. Azure provides a fantastic platform for building elastic applications. Combined with recent advances in browser capabilities, some older architectural patterns have become relevant again. We will dust off one of them, the client-server architecture, and show how we can use its modern incarnation to bypass a class of problems normally encountered with distributed ASP.NET applications.

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  • Google Map + MarkerClusterer only takes place when map completely zooms out

    - by user415795
    The clustering works but somehow it only takes place at the maximum zoom out(the largest view with all nations), the moment I zoom in by 1 value, the clustering icon changes back to markers. I try with all kinds of values on the maxZoom and gridSize clusterer options with no help. Can someone please kindly advice. Thanks. <script language="javascript" type="text/javascript"> var markersArray = []; var mc = null; var markersArray = []; var mc = null; var map; var mapOptions; var geocoder; var infoWindow; var http_request = false; var lat = 0; var lng = 0; var startingZoom = 7; var lowestZoom = 1; // The lower the number, the more places can be seen on within the bounds. var highestZoom = 8; function mapLoad() { geocoder = new google.maps.Geocoder(); infoWindow = new google.maps.InfoWindow(); mapOptions = { zoomControl: true, zoom: 2, minZoom: lowestZoom, maxzoom: highestZoom, draggable: true, scrollwheel: true, disableDoubleClickZoom: true, mapTypeId: google.maps.MapTypeId.ROADMAP }; map = new google.maps.Map(document.getElementById('map'), mapOptions); } $(document).ready(function () { var searchUrl; var locations; // Place the user's current location marker on the map var Location = new google.maps.LatLng(1.340319, 103.743744); var Location2 = new google.maps.LatLng(1.322347, 103.757881); createMarker('1', Location, 'My Location', '', '', '', '/Images/home.png'); createMarker('1', Location2, 'My Location', '', '', '', '/Images/bb.png'); var bounds = new google.maps.LatLngBounds(); bounds.extend(gameLocation); map.fitBounds(bounds); }); // Create the marker with address information function createMarker(actId, point, address1, address2, town, postcode, icon) { var marker = new google.maps.Marker({ map: map, icon: icon, position: point, title: address1, animation: google.maps.Animation.DROP }); marker.metadata = { id: actId }; markersArray.push(marker); mc = new MarkerClusterer(map, markersArray); return marker; } </script>

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  • Elastic Collision Formula in Java

    - by Shijima
    I'm trying to write a Java formula based on this tutorial: 2-D elastic collisions without Trigonometry. I am in the section "Elastic Collisions in 2 Dimensions". In step 1, it mentions "Next, find the unit vector of n, which we will call un. This is done by dividing by the magnitude of n". My below code represents the normal vector of 2 objects (I'm using a simple array to represent the normal vector), but I am not really sure what the tutorial means by dividing the magnitude of n to get the un. int[] normal = new int[2]; normal[0] = ball2.x - ball1.x; normal[1] = ball2.y - ball1.y; Can anyone please explain what un is, and how I can calculate it with my array in Java?

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  • How to code the set method of a Map with another Map as value?

    - by Nazgulled
    I normally do this to set a new Map to a private variable: public static void setListaClausulas(Map<String, Clausula> nvLista) { listaClausulas = new TreeMap<String, Clausula>(nvLista); } I suppose this is ok to set a new copy of the nvLista and all it's members and not a reference, is it? But now I have a Map inside another Map and I'm doing this: public static void setListaClausulas(Map<String, Map<String, Clausula>> nvLista) { listaClausulas = new TreeMap<String, Map<String, Clausula>>(nvLista); } Is this the correct way to do it or do you recommend something else? What I want is to set a new copy of nvLista (and all it's elements) and not copy just the reference.

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  • Moving only the contents of a map and not the map itself on linux

    - by WebDevHobo
    Using the cp command, one can move files and folders on linux. I want to make a new user and move the contents of the skeleton map to their home directory. I use this command: cp -r /etc/skel/ /home/testuser/ However, this only creates a skel folder in testuser. The idea is that the contents of the /etc/skel folder be copied to /home/testuser, and not that a map be made in /home/testuser with those contents. I've checked the man page: Link, but nothing on there really seemed like the solution to me. Is there a way to do this, or do files really need to be moved manually, 1 by 1?

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  • How to find relation between change in latitudes at centre of map and top/bottom

    - by Imran
    Hi, Im having little trouble finding a relation between the movement at centre and edge of a circle, Im doing for panning world map,my map extent is 180,89:-180,-89, my map pans by adding change(dx,dY) to its extents and not its centre. Now a situation has arrrised where I have to move the map to a specific centre, to calculate the change in longitudes is very easy and simple, but its the change in lattitudes that has caused problem. It seems the change in centreY of map is more than the change at edge of the mapY, or simply if I have to move the map centre from 0long,0lat to 73long,33lat, for dX I simply get 73, but for dY apparently it looks 33 but if i add 33 to top of map that is 89 , it will be 122 which is incorrect since Latitudes are between 90 and -90 . It seems a case a projection of a circle on 2D plane where the edge of circle since is moving backward due to angle expereinces less change and the centre expereinces more change, now is there a relation between these two factors? I tried converting the difference between OriginY and destinationY into radians and then add to Top and Bottom of Map, but it did'nt really work for me. Please note that the map is project on a virtual canvas whose width starts from 256 and increases by 256*2^z , z=0 is default and whole world is visible at that extent of canvas code: public void moveMapTo(double destinationLongitude,double destinationLattitude) // moves map to the new centre { double dXLong=destinationLongitude-centreLongitude; double atanhsinO = atanh(Math.sin(destinationLattitude * Math.PI / 180.00)); double atanhsinD = atanh(Math.sin(centreLatitude * Math.PI / 180.00)); double atanhCentre = (atanhsinD + atanhsinO) / 2; double latitudeSpan =destinationLattitude - centreLatitude; double radianOfCentreLatitude = Math.atan(Math.sinh(atanhCentre)); double dXLat=latitudeSpan / Math.cos(radianOfCentreLatitude); dXLat*=getLattitudeSpan()*(Math.PI/180); <--- HERE IS THE PORBLEM System.out.println("dxLong:"+dXLong+"_dxLat:"+dXLat); mapLeft+=dXLong; mapRight+=dXLong; mapTop+=dXLat; mapBottom+=dXLat; } ////latitude span function private double getLattitudeSpan() { double latitudeSpan = mapTop - mapBottom; latitudeSpan = latitudeSpan / Math.cos(radianOfCentreLatitude); return Math.abs(latitudeSpan); } //ht

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  • add extra hint icon at current google map

    - by user315396
    my code is written from http://stackoverflow.com/questions/1171433/jquery-xml-and-google-map Now all marker icons can be displayed at current google map. But now I want to add some function. When getting description of item (it will map to opposite icon) ,if user click this description, a hint will display near the map icon at google. I still can't how to start.I can get lat and lng of location. PS:some of markers will map to same point.

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  • ArrayList and Map problem in grails

    - by xain
    Hi, I have a service that contains a map: static Map cargosMap = ['1':'item1','2':'item 2','3':'item 3'] that is returned via a method in the service: static Map getCargos() { [cargosMap] } A controller calls it like this: def mform = { Map cargos = empService.getCargos() [cargos:cargos] } In the gsp, I have the select: <g:select name="cg1" from="${cargos}" /> But I'm getting the exception: Error 500: Executing action ....caused exception: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object ... with class 'java.util.ArrayList' to class 'java.util.Map' Any clues ? Thanks

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  • More Efficient Data Structure for Large Layered Tile Map

    - by Stupac
    It seems like the popular method is to break the map up into regions and load them as needed, my problem is that in my game there are many AI entities other than the player out performing actions in virtually all the regions of the map. Let's just say I have a 5000x5000 map, when I use a 2D array of byte's to render it my game uses around 17 MB of memory, as soon as I change that data structure to a my own defined MapCell class (which only contains a single field: byte terrain) my game's memory consumption rockets up to 400+ MB. I plan on adding layering, so an array of byte's won't cut it and I figure I'd need to add a List of some sort to the MapCell class to provide objects in the layers. I'm only rendering tiles that are on screen, but I need the rest of the map to be represented in memory since it is constantly used in Update. So my question is, how can I reduce the memory consumption of my map while still maintaining the above requirements? Thank you for your time! Here's a few snippets my C# code in XNA4: public static void LoadMapData() { // Test map generations int xSize = 5000; int ySize = 5000; MapCell[,] map = new MapCell[xSize,ySize]; //byte[,] map = new byte[xSize, ySize]; Terrain[] terrains = new Terrain[4]; terrains[0] = grass; terrains[1] = dirt; terrains[2] = rock; terrains[3] = water; Random random = new Random(); for(int x = 0; x < xSize; x++) { for(int y = 0; y < ySize; y++) { //map[x,y] = new MapCell(terrains[random.Next(4)]); map[x,y] = new MapCell((byte)random.Next(4)); //map[x, y] = (byte)random.Next(4); } } testMap = new TileMap(map, xSize, ySize); // End test map setup currentMap = testMap; } public class MapCell { //public TerrainType terrain; public byte terrain; public MapCell(byte itsTerrain) { terrain = itsTerrain; } // the type of terrain this cell is treated as /*public Terrain terrain { get; set; } public MapCell(Terrain itsTerrain) { terrain = itsTerrain; }*/ }

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  • Go - Using a map for its set properties with user defined types

    - by Seth Hoenig
    I'm trying to use the built-in map type as a set for a type of my own (Point, in this case). The problem is, when I assign a Point to the map, and then later create a new, but equal point and use it as a key, the map behaves as though that key is not in the map. Is this not possible to do? // maptest.go package main import "fmt" func main() { set := make(map[*Point]bool) printSet(set) set[NewPoint(0, 0)] = true printSet(set) set[NewPoint(0, 2)] = true printSet(set) _, ok := set[NewPoint(3, 3)] // not in map if !ok { fmt.Print("correct error code for non existent element\n") } else { fmt.Print("incorrect error code for non existent element\n") } c, ok := set[NewPoint(0, 2)] // another one just like it already in map if ok { fmt.Print("correct error code for existent element\n") // should get this } else { fmt.Print("incorrect error code for existent element\n") // get this } fmt.Printf("c: %t\n", c) } func printSet(stuff map[*Point]bool) { fmt.Print("Set:\n") for k, v := range stuff { fmt.Printf("%s: %t\n", k, v) } } type Point struct { row int col int } func NewPoint(r, c int) *Point { return &Point{r, c} } func (p *Point) String() string { return fmt.Sprintf("{%d, %d}", p.row, p.col) } func (p *Point) Eq(o *Point) bool { return p.row == o.row && p.col == o.col }

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  • Fit Map onto Google Map

    - by Viplime
    I would like to fit my map onto the same place in google maps.I have max 10 gps(latitude and longitude) positions on my map and I want to fit it on google maps using the points.I think I need to use overlay features of google maps.However, I need to transform my map to fit properly.How do i transform my map(image) to be able to fit it onto google maps? Is there an google method or API for it? Thanks.

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  • Bing Maps - how to link to a push pin from a link outside the map

    - by Rajah
    I have a Virtual Earth Maps (Bing Maps??) to which I have added a set of pushpins. Each pushpin is labelled 1 to n. In addition to adding pushpins to the map, I also add text to the web-page that contains the description to each pushpin. I would like to add a link to the text outside the map, that when clicked will open the balloon associated with the corresponding pushpin. How do I open the balloon associated with a pushpin, through a link that exists outside the map? To get a better understanding, look at my map: link. When you click load, PushPins are added to the map. I would like to have a link from the list on the right of the map, that opens the corresponding PushPin. Thanks in advance!

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  • Join map and refer to its key/value in HQL

    - by alamar
    Suppose I have a map: <map name="externalIds" table="album_external_ids"> <key column="album_id" not-null="true"/> <map-key-many-to-many class="Major" column="major_id"/> <element column="external_id" type="string" not-null="true"/> </map> How do I make a HQL meaning "select entities where map key's id == :foo and map value == :bar"? I can join it using select album from Album album join album.externalIds ids But how would I then refer to ids' key and value? ids.key.id = :foo and ids.value = :bar doesn't work, and hibernate doc is silent on this topic. Naive approaches that didn't work: select album from Album album join album.externalIds externalId where index(externalId).id = :foo and externalId = :bar and select album from Album album join album.externalIds externalId join index(externalId) major where major.id = :foo and externalId = :bar

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  • google collections ordering on map values

    - by chris-gr
    I would like to order a map based on the values. Function<Map.Entry<A, Double>, Double> getSimFunction = new Function<Map.Entry<A, Double>, Double>() { public Double apply(Map.Entry<A, Double> entry) { return entry.getValue(); } }; final Ordering<Map.Entry<A, Double>> entryOrdering = Ordering.natural().onResultOf(getSimFunction); ImmutableSortedMap.orderedBy(entryOrdering).putAll(....).build(); How can I create a new sortedMap based on the ordering results or a sortedset based on the map.keyset()?

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  • Need help with map (c++, STL)

    - by Mike Dooley
    Hi folks! Actually I'm new to C++. I tried something out (actually the map container) but it doesn't work the way I assumed it will... Before posting my code, I will explain it shortly. I created 3 classes: ClassA ClassDerivedA ClassAnotherDerivedA The two last ones are derived from "ClassA". Further I created a map: map<string,ClassA> test_map; I put some objects (from Type ClassDerivedA and ClassAnotherDerivedA) into the map. Keep in mind: the mapped value is from type "ClassA". This will only work because of Polymorphism. Finally I created an iterator which runs over my map and compares the user input with my keys in the map. If they match, it will call a specific method called "printOutput". And there is the Problem: Although i declared "printOutput" as "virtual" the only method called is the one from my base class, but why? and here is the code: #include <iostream> #include <map> using namespace std; class ClassA { public: virtual void printOutput() { cout << "ClassA" << endl; } }; class ClassDerivedA : public ClassA { public: void printOutput() { cout << "ClassDerivedA" << endl; } }; class ClassAnotherDerivedA: public ClassA { public: void printOutput() { cout << "ClassAnotherDerivedA" << endl; } }; int main() { ClassDerivedA class_derived_a; ClassAnotherDerivedA class_another_a; map<string,ClassA> test_map; test_map.insert(pair<string,ClassA>("deriveda", class_derived_a)); test_map.insert(pair<string,ClassA>("anothera", class_another_a)); string s; while( cin >> s ) { if( s != "quit" ) { map<string,ClassA>::iterator it = test_map.find(s); if(it != test_map.end()) it->second.printOutput(); } else break; } } Blockquote

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  • Use of for_each on map elements

    - by Antonio
    I have a map where I'd like to perform a call on every data type object member function. I yet know how to do this on any sequence but, is it possible to do it on an associative container? The closest answer I could find was this: Boost.Bind to access std::map elements in std::for_each. But I cannot use boost in my project so, is there an STL alternative that I'm missing to boost::bind? If not possible, I thought on creating a temporary sequence for pointers to the data objects and then, call for_each on it, something like this: class MyClass { public: void Method() const; } std::map<int, MyClass> Map; //... std::vector<MyClass*> Vector; std::transform(Map.begin(), Map.end(), std::back_inserter(Vector), std::mem_fun_ref(&std::map<int, MyClass>::value_type::second)); std::for_each(Vector.begin(), Vector.end(), std::mem_fun(&MyClass::Method)); It looks too obfuscated and I don't really like it. Any suggestions?

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  • More on Map Testing

    - by Michael Stephenson
    I have been chatting with Maurice den Heijer recently about his codeplex project for the BizTalk Map Testing Framework (http://mtf.codeplex.com/). Some of you may remember the article I did for BizTalk 2009 and 2006 about how to test maps but with Maurice's project he is effectively looking at how to improve productivity and quality by building some useful testing features within the framework to simplify the process of testing maps. As part of our discussion we realized that we both had slightly different approaches to how we validate the output from the map. Put simple Maurice does some xpath validation of the data in various nodes where as my approach for most standard cases is to use serialization to allow you to validate the output using normal MSTest assertions. I'm not really going to go into the pro's and con's of each approach because I think there is a place for both and also I'm sure others have various approaches which work too. What would be great is for the map testing framework to provide support for different ways of testing which can cover everything from simple cases to some very specialized scenarios. So as agreed with Maurice I have done the sample which I will talk about in the rest of this article to show how we can use the serialization approach to create and compare the input and output from a map in normal development testing. Prerequisites One of the common patterns I usually implement when developing BizTalk solutions is to use xsd.exe to create .net classes for most of the schemas used within the solution. In the testing pattern I will take advantage of these .net classes. The Map In this sample the map we will use is very simple and just concatenates some data from the input message to the output message. Hopefully the below picture illustrates this well. The Test In the test I'm basically taking the following actions: Use the .net class generated from the schema to create an input message for the map Serialize the input object to a file Run the map from .net using the standard BizTalk test method which was generated for running the map Deserialize the output file from the map execution to a .net class representing the output schema Use MsTest assertions to validate things about the output message The below picture shows this: As you can see the code for this is pretty simple and it's all strongly typed which means changes to my schema which can affect the tests can be easily picked up as compilation errors. I can then chose to have one test which validates most of the output from the map, or to have many specific tests covering individual scenarios within the map. Summary Hopefully this post illustrates a powerful yet simple way of effectively testing many BizTalk mapping scenarios. I will probably have more conversations with Maurice about these approaches and perhaps some of the above will be included in the mapping test framework.   The sample can be downloaded from here: http://cid-983a58358c675769.office.live.com/self.aspx/Blog%20Samples/More%20Map%20Testing/MapTestSample.zip

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