mapping

问题 My controller can't map a Google Guava Multimap coming from the frontend. I send from my Javascript this object: {1:[true,false], 2:[false,true], ...}. If I use a standard java.util.Map<Long, List<Boolean>> everything works fine. But not with the Guava Multimap . Do I have to configure Spring to use some custom converter, or what is the problem? The controller is: @RequestMapping(path = "/myurl", method = RequestMethod.POST, produces = CotrollerKonstanten.JSON_UTF8) public long myMethod(

问题 I'm still fairly new with Google Scripts. I have a student roster Google Sheet with demographic information, including ID numbers. I also have a responses Sheet that automatically collects email addresses on Column B (email addresses are created by the ID number plus "@foo.org"). I'm trying to get my script to parse through auto-collected emails, map the ID portion of the email onto column C. Then I'm using for loops to check the extracted ID number against my main roster, and map the

问题 I'm trying to parse a JSON to an object in java, the JSON is something like that {"usage":{"text_characters":22,"features":1,"text_units":1},"entities":[{"count":1,"text":"pisos","disambiguation":{"subtype":["NONE"]},"type":"Producto"},{"count":1,"text":"No hay","disambiguation":{"subtype":["NONE"]},"type":"Quiebre_Stock"},{"count":1,"text":"madera","disambiguation":{"subtype":["NONE"]},"type":"Producto"}],"language":"es"} I'm trying to mapping with this method parsedJsonObj = mapper

问题 I am trying to add points to a world map and color them. I have longitude and latitude information for each point, but somehow the outcome points are positioned in a wrong place in the map. It has to be something with the map projection I am using. This are some of the points ('locations') I am trying to add to the world map: longitude latitude subspecies -54.8706 -67.4208 red -53.8057 -67.6862 red -53.9433 -67.4866 red -54.4833 -69.6666 red -54.3833 -66.5666 red -54.7333 -65.2 red -53.2333

问题 Using the tutorial here: https://www.r-spatial.org/r/2018/10/25/ggplot2-sf-2.html (in the section called "States (polygon data)"), I'm trying to convert polygons to an sf object. library("maps") states <- st_as_sf(map("state", plot = FALSE, fill = TRUE)) head(states) I get the error message: Error in as_mapper(.f, ...) : argument ".f" is missing, with no default Thank you in advance! 回答1: Looks like it's confusing map() from the purrr package with map() from the maps package. Try: states <-

问题 Let's say I have two different classes. They share some properties, but also have some individual ones. public class A { // Shared properties public int Id { get; set; } public DateTime CreatedDtm { get; set; } public string CreatedBy { get; set; } // Individual properties public string PhoneNumber { get; set; } public string EmailAddress { get; set; } } public class B { // Shared properties public int Id { get; set; } public DateTime CreatedDtm { get; set; } public string CreatedBy { get;

问题 I am trying to use javax.persistence.* to auto create Table by uesing @Entity. Here is some problem. Is there anyway to convert the JsonNode to String By use Annotation. edit: the Jpa is Spring-Data-Jpa and the JsonNode is fasterxml.jackson 回答1: You cannot use a JsonNode on entity column using Spring Data Jpa, You must use String and in another class you can write a method which converts string to Json (a reverse Jason to string) format and Resolved! 回答2: Annotate your Json property with

问题 Following this case, i'm trying to map a table column IsActive to two different entity property. is there any way to do this? 回答1: It is not possible. Each column must be mapped only once because otherwise it would lead to inconsistencies. For example if you would set different value to each property which one should be saved? Also having two properties exposing same field doesn't make sense. 回答2: You can't have two properties in the same Entity mapped to the same column. But there are

问题 Following this case, i'm trying to map a table column IsActive to two different entity property. is there any way to do this? 回答1: It is not possible. Each column must be mapped only once because otherwise it would lead to inconsistencies. For example if you would set different value to each property which one should be saved? Also having two properties exposing same field doesn't make sense. 回答2: You can't have two properties in the same Entity mapped to the same column. But there are

问题 I have model classes that I need to use with Entity Framework Core. Unfortunately, I cannot make changes to these classes and none of them use nullable columns, while the database tables they map to do have nullable columns. EF throws an (expected) exception when trying to pull data from the database into the model class. Is there a way to configure EF Core to automatically map NULLs in a column to the default for the given type? For example, //Model class class Foo { public int Id {get; set;