mapping

问题 When loading an external csv with Oracle SQL Loader is there a way to map the fields directly to each other in the control file? At the moment I'm doing a simple loading, so the position of the source fields is important. Is there a way to do it otherwise? So instead of: load data into table1 fields terminated by "," optionally enclosed by '"' (destination_field1, destination_field2, destination_field3) do something like: load data into table1 fields terminated by "," optionally enclosed by '

问题 The code below maps values and column names of my reference df with my actual dataset, finding exact matches and if an exact match is found, return the OutputItemNameByValue . However, I'm trying to add the rule that when PrimaryLookupAttributeValue = DEFAULT to also return the OutputItemNameByValue . The solution I'm trying out to tackle this is to create a new dataframe with null values - since there was no match provided by code below. Thus the next step would be to target the null values

问题 The code below maps values and column names of my reference df with my actual dataset, finding exact matches and if an exact match is found, return the OutputItemNameByValue . However, I'm trying to add the rule that when PrimaryLookupAttributeValue = DEFAULT to also return the OutputItemNameByValue . The solution I'm trying out to tackle this is to create a new dataframe with null values - since there was no match provided by code below. Thus the next step would be to target the null values

问题 The code below maps values and column names of my reference df with my actual dataset, finding exact matches and if an exact match is found, return the OutputItemNameByValue . However, I'm trying to add the rule that when PrimaryLookupAttributeValue = DEFAULT to also return the OutputItemNameByValue . The solution I'm trying out to tackle this is to create a new dataframe with null values - since there was no match provided by code below. Thus the next step would be to target the null values

问题 I am building a react app. I have created a dynamic form (generates X number of input fields (1-10) based on the number chosen by the user).That part works perfectly. However, I am wanting to add a second input field inside my mapping function. For context, I am building a flash card app. I want to add the term and the definition to the same state item. The idea is that each state array will hold an object for the term and an object for the definition in order to keep each definition with its

问题 I would like to implement my own RecordMapper and use Mapstruct to map the Record to the POJO. I don't quite understand how to accomplish this. I followed this part of the docs: https://www.jooq.org/doc/3.13/manual/sql-execution/fetching/pojos-with-recordmapper-provider/ My mapper looks like this: public class LanguageMapper<R extends Record, E> implements RecordMapper<R, Language> { @Override public Language map(R record) { LanguageRecord languageRecord = (LanguageRecord) record; // this is

问题 I have a bunch of latitude/longitude pairs that map to known x/y coordinates on a (geographically distorted) map. Then I have one more latitude/longitude pair. I want to plot it on the map as best is possible. How do I go about doing this? At first I decided to create a system of linear equations for the three nearest lat/long points and compute a transformation from these, but this doesn't work well at all. Since that's a linear system, I can't use more nearby points either. You can't assume

问题 I'm using MapStruct to make dto <-> entity mapping. The same mappers are used to create and update entities from dtos. A verification of the dto's id is done to know whether a new entity must be created (id == null) or it should be retrieved from database (id != null) . I'm actually using MapperDecorator as a workaround. Example : Mapper @Mapper @DecoratedWith(UserAccountDecorator.class) public interface UserAccountMapper { UserAccountDto map(User user); User map(UserAccountDto dto); User map

问题 Considering these two objects : struct Product { let id: Int let title: String let price: Int let categoryId: Int } struct Category { let id: Int let name: String } I created also those two data arrays : let products = [ Product(id: 1, title: "snake", price: 20, categoryId: 1), Product(id: 2, title: "soap", price: 20, categoryId: 2), Product(id: 3, title: "cream", price: 20, categoryId: 3), Product(id: 4, title: "dog", price: 20, categoryId: 1), Product(id: 5, title: "car", price: 20,

问题 I do validation with JSR-303 in my Spring app, it works as needed. This is an example: @Column(nullable = false, name = "name") @JsonProperty("customer_name") @NotEmpty @Size(min = 3, max = 32) private String name; And REST API clients use customer_name as name of input field that send to API bud validation field error org.springframework.validation.FieldError returns name as name of the field. Is there some way hot to get JSON-ish name that is specified in @JsonProperty ? Or do I have to