field

问题 I want to copy elements to a remote MS-SQL database. I got conversion error on it. When I checked the ADOTable structure I saw the MS field WHENCREATED DATE [NULL] is converted to ftWideString 10 Hmmmmm.... Is it normal? Or I can set something to Date fields are come as TDateTime? The Provider is "SQLOLEDB.1" 回答1: Its a DATE (yyyy-mm-dd) type which was introduced in SQL Server 2008 as an alternative to the DATETIME type. Because SQLOLEDB.1 precedes this there is a backward conversion to

问题 is there any way to get the Instance from a Field? Here's a sample code: public class Apple { // ... a bunch of stuffs.. } public class Person { @MyAnnotation(value=123) private Apple apple; } public class AppleList { public add(Apple apple) { //... } } public class Main { public static void main(String args[]) { Person person = new Person(); Field field = person.getClass().getDeclaredField("apple"); // Do some random stuffs with the annotation ... AppleList appleList = new AppleList(); //

问题 I've created a form with about 800 fields in it. Unknowingly I've given same id for few fields in the form. How to trace them? 回答1: The http://validator.w3.org/ will be the handy solution. But using jquery you can do something like this: //See your console for duplicate ids $('[id]').each(function(){ var id = $('[id="'+this.id+'"]'); if(id.length>1 && id[0]==this) { console.log('Duplicate id '+this.id); alert('duplicate found'); } }); Hope this helps. 回答2: This might help you Source: Finding

问题 I am not understanding when to use omitNorms="true". I read 2-3 links but still I am not clear with its meaning. what does it mean "Set to true to omit the norms associated with this field (this disables length normalization and index-time boosting for the field, and saves some memory). Only full-text fields or fields that need an index-time boost need norms." at http://wiki.apache.org/solr/SchemaXml page 回答1: Norms are stored as a Single byte information in the index per document per field.

问题 Is it possible to get a Object that is instanced in the Code by a String at Runtime? Somthing like that: public String xyz = "aaaa_bbb"; getObject("xyz").some function of String (e.g.: .split("_")) Thanks 回答1: Here's an example If it's a class field, you can get it by name like this. import java.lang.reflect.Method; public class Test { public String stringInstance = "first;second"; public void Foo() { try { Object instance = getClass().getDeclaredField("stringInstance").get(this); Method m =

问题 I'm writing an app that gets a Json list of objects like this: [ { "ObjectType": "apple", "ObjectSize": 35, "ObjectCost": 4, "ObjectTaste": "good", "ObjectColor": "golden" }, { "ObjectType": "books", "ObjectSize": 53, "ObjectCost": 7, "Pages": 100 }, { "ObjectType": "melon", "ObjectSize": 35, "ObjectTaste": "good", "ObjectCost": 5 }, { "ObjectType": "apple", "ObjectSize": 29, "ObjectCost": 8, "ObjectTaste": "almost good", "ObjectColor": "red" } ] I want to make a base class ItemToSell (size

问题 I'm writing an app that gets a Json list of objects like this: [ { "ObjectType": "apple", "ObjectSize": 35, "ObjectCost": 4, "ObjectTaste": "good", "ObjectColor": "golden" }, { "ObjectType": "books", "ObjectSize": 53, "ObjectCost": 7, "Pages": 100 }, { "ObjectType": "melon", "ObjectSize": 35, "ObjectTaste": "good", "ObjectCost": 5 }, { "ObjectType": "apple", "ObjectSize": 29, "ObjectCost": 8, "ObjectTaste": "almost good", "ObjectColor": "red" } ] I want to make a base class ItemToSell (size

问题 Looking for a scalable, flexible and fast database design for 'Build your own form' style website - e.g Wufoo. Rules: User has only 1 Form they can build User can create their own fields or choose from 'standard' fields User's 1 Form has as many fields as the user wants Values can be the sibling of another value E.g A photo value could have name, location, width, height as sibling values Special Rules: User can submit their form a maximum of 5 times a day Value's Date is important Flexibility

问题 Imagine we have some sort of protocol with hundreds of message types, each of which we want to model by a C++ class. Since each class should be able to process each field automatically, a natural solution is to just have an std::tuple with all the required types: std::tuple<int, double, char> message; print(message); // the usual variadic magic This is all fine and well. However, now I want to give each field a name, and I want to be able to use the name when referring to the field in my code

问题 What is the meaning of the TSV and TSER fields in an Ethereal dump? I tried googling but could not find the answer. 回答1: TSV is the Timestamp Value field. It is used in conjunction with sequence number to uniquely identify segments (since sequence numbers may wrap). TSER is the Timestamp Echo Reply field. This is used in ACK messages. It holds a copy of the last TSV value received. It can be used for round trip time estimation (RTT = current time - TSER). The fields are formally described in