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Questions tagged [mapping]

Corresponding every element of a given set to a unique element of another set or it may refer to a process of creating data element mappings between two distinct data models (objects)

In this context, mapping refers to the process of creating data element mappings between two distinct data models (objects).

When it refers to mapping in data integration, it is a set of source and target definitions linked by the transformation objects that define the rules for data transformation. Mappings represent the data flow between sources and targets.

Data mapping is typically used as a first step for a wide variety of data integration tasks such as:

  1. Data transformation or data mediation between a data source and a destination

  2. Identification of data relationships as part of data lineage analysis

  3. Replication of data between two entities with different key-value assignments

  4. Discovery of hidden sensitive data such as the last four digits social security number hidden in another user id as part of a data masking or de-identification project

  5. Consolidation of multiple databases into a single data base and identifying redundant columns of data for consolidation or elimination.

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Mapping object to dictionary and vice versa

Are there any elegant quick way to map object to a dictionary and vice versa? Example: IDictionary a = new Dictionary(); a["Id"]=1; a["Name"]="Ahmad"; // ..... becomes SomeClass b = new…
Saw
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Converting from longitude\latitude to Cartesian coordinates

I have some earth-centered coordinate points given as latitude and longitude (WGS-84). How can i convert them to Cartesian coordinates (x,y,z) with the origin at the center of the earth?
daphshez
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Deserialize JSON to ArrayList using Jackson

I have a Java class MyPojo that I am interested in deserializing from JSON. I have configured a special MixIn class, MyPojoDeMixIn, to assist me with the deserialization. MyPojo has only int and String instance variables combined with proper getters…
tacos_tacos_tacos
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How to introduce multi-column constraint with JPA annotations?

I am trying to introduce a multi-key constraint on a JPA-mapped entity: public class InventoryItem { @Id private Long id; @Version private Long version; @ManyToOne @JoinColumn("productId") private Product product; …
plouh
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Math - mapping numbers

How do I map numbers, linearly, between a and b to go between c and d. That is, I want numbers between 2 and 6 to map to numbers between 10 and 20... but I need the generalized case. My brain is fried.
Sam
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Can I use SPACE as mapleader in VIM?

From http://items.sjbach.com/319/configuring-vim-right (2009 archive from original) I got that you were supposed to be able to use Space as the mapleader in vim. I've tried but it does not seem to work. Is there anyone who made it work? Tried: let…
Marlun
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Elasticsearch : Root mapping definition has unsupported parameters index : not_analyzed

Hi all I am trying to create schema Test. PUT /test { "mappings": { "field1": { "type": "integer" }, "field2": { "type": "integer" }, "field3": { "type": "string", …
Ramesh
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Flutter Pub: Expected a key while parsing a block mapping. path:

I'm using JSON file and register in Pubspec.ymal but showing error and also when I use an image and register it, the same error also occurs. Maybe there is a formatting mistake in it, but don't know what the problem is.this is the doc I…
Farhana Naaz Ansari
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Class Mapping Error: 'T' must be a non-abstract type with a public parameterless constructor

While mapping class i am getting error 'T' must be a non-abstract type with a public parameterless constructor in order to use it as parameter 'T' in the generic type or method. Below is my SqlReaderBase Class public abstract class SqlReaderBase…
user240141
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What is the meaning of a at the end of some vim mappings?

I see s a lot in vim mappings, but what does it do?
Lucia
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Simple way to subset SpatialPolygonsDataFrame (i.e. delete polygons) by attribute in R

I would like simply delete some polygons from a SpatialPolygonsDataFrame object based on corresponding attribute values in the @data data frame so that I can plot a simplified/subsetted shapefile. So far I haven't found a way to do this. For…
baha-kev
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Class that acts as mapping for **unpacking

Without subclassing dict, what would a class need to be considered a mapping so that it can be passed to a method with **. from abc import ABCMeta class uobj: __metaclass__ = ABCMeta uobj.register(dict) def f(**k): return k o =…
dskinner
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What the equivalent of activity life cycle in iOS?

Actually, I would say that both iOS ViewControllers and Android Activities have their lifecycle methods. For example an equivalent of ViewController.viewDidLoad() is Activity.onCreate() ? Else I still need to know the equivalent of the other…
TooCool
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Haskell: how to map a tuple?

In Haskell, I can easily map a list: map (\x -> 2*x) [1,2] gives me [2,4]. Is there any "mapTuple" function which would work like that? mapTuple (\x -> 2*x) (1,2) with the result being (2,4).
quant_dev
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How to ignore null values for all source members during mapping in Automapper 6?

I've been looking everywhere: stackoverflow, automapper documentation, internets and just couldn't find any info on this one, even tho this seems to be a very common problem. My mapping: CreateMap() …
Sikor
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