keyword

问题 Consider the following code: public abstract class Test1 { public object Data { get; set; } } public abstract class Test2<T> : Test1 { public T Data { get; set; } } This will generate the following warning: 'Test2.Data' hides inherited member 'Test1.Data'. Use the new keyword if hiding was intended. Why is this only a warning and what effect will adding the "new" keyword have? According to my testing I cannot find any difference once the "new" keyword is added. Don't get me wrong, I'm all for

问题 I have a set of items in db .Each item has a name and a description .I need to implement a search facility which takes a number of keywords and returns distinct items which have at least one of the keywords matching a word in the name or description. for example I have in the db ,three items 1.item1 : name : magic marker description: a writing device which makes erasable marks on whiteboard 2.item2: name: pall mall cigarettes description: cigarette named after a street in london 3.item3: name

问题 I am new to Kotlin and I am confused between open and public keywords. Could anyone please tell me the difference between those keywords? 回答1: The open keyword means “open for extension“: The open annotation on a class is the opposite of Java's final : it allows others to inherit from this class. By default , all classes in Kotlin are final , which corresponds to Effective Java, Item 17: Design and document for inheritance or else prohibit it . You also need to be explicit about methods you

问题 I've been able to search for keywords in strings before, but I'm running into a problem with using a list to do so. I keep getting this error. TypeError: 'in <string>' requires string as left operand, not bool I've tried every solution I could think of, but this is where I'm at right now: from BeautifulSoup import BeautifulSoup import urllib2 keywords = ['diy','decorate', 'craft', 'home decor', 'food'] def get_tags(blog_soup): tags_html = blog_soup.find('div', attrs = {'style': 'margin-left:

问题 I am stuck for 3 hours with i guess simple thing but been searching internet and didnt find the answer. I have 1, 2, 3, 4 or more keywords and a string to search for keywords in it. I am looking for regexp expression that maches ALL the keywords. So for example: string = "this car is red and has big wheels" keywords: car wheels return: true keywords: wheels car return: true keywords: car is red return: true keywords: this is big return: true keywords: car is red small return: false (there is

问题 can anyone tell me what I've done wrong? I've tried changing a few things around but I keep getting the same error so I'm convinced that I've forgotten something. I hope someone can help Error starting at line : 1 in command - CREATE TABLE Player( Plyr_ID int NOT NULL PRIMARY KEY, Plyr_Fname NVARCHAR2(20), Plyr_Sname NVARCHAR2(20), Plyr_DOB date, Plyr_Height DOUBLE, Plyr_Weight double, Plyr_position NVARCHAR2(20), Plyr_experience int, Team_ID INT NOT NULL, CONSTRAINT fk_Team FOREIGN KEY (Team

问题 I'm using eclipse CDT to develop C++11 projects. I can configure eclipse as I like, except that I cannot make eclipse recognize C++11's new keywords: final and override . Is it possible to color final and override in current eclipse? 回答1: Use the Others parameter on the Syntax Coloring tab. 来源： https://stackoverflow.com/questions/24398910/how-to-color-c11s-new-keywords-final-and-override-in-eclipse

问题 I have customized a new language in Notepad++. My problem is that I have two keywords : LAYER and LAYER_ENCODING . In the menu Languages > Define Your language > Select your defined language , LAYER is mentionned in the first tab Syntax folding whereas LAYER_ENCODING is mentionned in the second tab Keywords lists . Here is the syntax coloration I get for LAYER_ENCODING : I seems that LAYER_ENCODING keyword is not recognized because LAYER already exists... Any idea on how I could solve this

问题 I am curious about keywords in Java. Should I understand it as a class of various methods that get created with every instance of user-defined classes, like the ultimate “super” class? How is it defined in the Java? So for example, I came across this: class A { class B {} } A a = new A(); B b = a.new B(); This seems like each class has keyword new as its own method. I would appreciate any insights on how keywords are defined/implemented in Java. 回答1: Classes don't have keyword "new" as a

问题 as always, your help is very much valued <3 I have listings on my site that feature metadata keywords in the description. I'd like to make these appear like tags (our cms doesn't support tags hence this hack). It prints just the words separated with commas, like so: <div class="tags">abp, accredited building practitioners, calendar of events, upcoming events</div> Is javascript capable of finding any word in these divs and replacing them with a href that links to oursite.com/search?query