keyword

问题 So an optional parameter expected in the web POST request of an API I'm using is actually a reserved word in python too. So how do I name the param in my method call: example.webrequest(x=1,y=1,z=1,from=1) this fails with a syntax error due to 'from' being a keyword. How can I pass this in in such a way that no syntax error is encountered? 回答1: Pass it as a dict. func(**{'as': 'foo', 'from': 'bar'}) 回答2: args = {'x':1, 'y':1, 'z':1, 'from':1} example.webrequest(**args) // dont use that

问题 With the JSON defined as it is, in order to deserialize it as an object, I'd need to create a property on my class called "event", which is a C# keyword. Is there another way to tell it what the field names will be? Here's an example of the JSON: { event: 123 data: {"data":"0D0401","ttl":"60","published_at":"2014-04-16T18:04:42.446Z","id":"48ff6f065067555031192387"} } Here are my classes that won't compile because of the keyword: public class Event { public int event { get; set; } public

问题 I'm looking for a Java library to extract keywords from a block of text. The process should be as follows: stop word cleaning -> stemming -> searching for keywords based on English linguistics statistical information - meaning if a word appears more times in the text than in the English language in terms of probability than it's a keyword candidate. Is there a library that performs this task? 回答1: Here is a possible solution using Apache Lucene. I didn't use the last version but the 3.6.2 one

问题 I am trying to use the PL/R procedural language in a PostgreSQL 9.2 database. I have installed the plr language and I am trying to add it to a database. When I run the command CREATE EXTENSION plr; I get the following error: ERROR: language "C" does not exist STATEMENT: CREATE EXTENSION plr; ERROR: language "C" does not exist When I list the available languages in the database with select * from pg_language; I get lanname | lanowner | lanispl | lanpltrusted | lanplcallfoid | laninline |

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. How do I data mine a pile of text to get keywords by usage? ("Jacob Smith" or "fence") And is there a

问题 I know C# well, but it is something strange for me. In some old program, I have seen this code: public MyType this[string name] { ......some code that finally return instance of MyType } How is it called? What is the use of this? 回答1: It is indexer. After you declared it you can do like this: class MyClass { Dictionary<string, MyType> collection; public MyType this[string name] { get { return collection[name]; } set { collection[name] = value; } } } // Getting data from indexer. MyClass

问题 Can someone explain when you're supposed to use the static keyword before global variables or constants defined in header files? For example, lets say I have a header file with the line: const float kGameSpriteWidth = 12.0f; Should this have static in front of const or not? What are some best practices for using static ? 回答1: static renders variable local to the file which is generally a good thing, see for example this Wikipedia entry. 回答2: You should not define global variables in header

问题 I have some JSON that I am deserializing using Gson. { "resp": { "posts": [ { ... "public": true, ... }] } My problem is that public is a Java keyword, so how would I make a field in my class that correlates with the public field in the JSON? 回答1: You could use a different name for your field, using gson's Field Naming Support. public class Post { @SerializedName("public") private boolean isPublic; ... } 回答2: Worth a quick note that you need to include gson.annotations or SerializedName for

问题 This question already has an answer here : What is the VB.NET equivalent of the C# “var” keyword? (1 answer) Closed 6 years ago . Is there a VB.NET equivalent to the C# var keyword? I would like to use it to retrieve the result of a LINQ query. 回答1: Option Infer must be on in order for this to function properly. If so, then omitting the type in VB.NET (Visual Basic 9) will implicitly type the variable. This is not the same as "Option Strict Off" in previous versions of VB.NET, as the variable

问题 What is the difference between the keywords this and super ? Both are used to access constructors of class right? Can any of you explain? 回答1: Lets consider this situation class Animal { void eat() { System.out.println("animal : eat"); } } class Dog extends Animal { void eat() { System.out.println("dog : eat"); } void anotherEat() { super.eat(); } } public class Test { public static void main(String[] args) { Animal a = new Animal(); a.eat(); Dog d = new Dog(); d.eat(); d.anotherEat(); } }