keyword

问题 I know that delete is a keyword in JavaScript. So I have this code (for example): var user = { create : function () { // Create a user account }, delete : function () { // Delete a user account } }; The above works (barring older versions of IE), so my question is - is it a good idea. Obviously the call user.delete(); is much clearer to someone utilizing the code than something like user.delete_one(); Obviously keywords are important, but on a case by case basis is it alright (granted I don't

问题 Suppose that I take a user-supplied string, userstring, and call (keyword userstring) on it. Are there any security concerns about doing this? And if so, what would be the best way to mitigate them? 回答1: Per http://clojure.org/reader, there are rules for which characters are valid in symbols and keywords. (For now, alphanumeric characters and * , + , ! , - , _ , and ? .) You should never create a symbol containing any other characters. However, right now, these rules are completely unenforced

问题 What is the char reserved keyword used for in JavaScript (as type declaration is not necessary), and especially, what is the correct syntax to use it (could someone give me a proper full example)? Because writing char c; throws an interpretation error saying missing ; before statement , just before the c ? 回答1: There are a lot of reserved keyword in JavaScript that are reserved for "future" use. They don't necessarily have a current use and a description. MDN does list some of them that have

问题 What exactly is the purpose of the external keyword in Kotlin? I guess it's for JNI like native in Java, but I can't seem to find any actual reference or documentation on this. 回答1: Indeed, it's an equivalent of Java's native . It's currently missing from the documentation but there's an issue to add it. 回答2: According to documentation: external marks a declaration as implemented not in Kotlin (accessible through JNI or in JavaScript) 来源： https://stackoverflow.com/questions/35552834/what-is

问题 Recently I just got an error in java that Exception in thread "main" java.lang.NoSuchMethodError: main Even if my class was just of 3 line of code. public class Test{ public static void main(String[] args){ System.out.println("hello"); } } I was wondering why this happens, but later on i get to know there was a public class String which i had tried & created in same package. so now new question arise is what happen in this kind of situation though String is not a keyword defined in java (you

问题 I dabbled with solr but couldn't figure out a way to tailor it to my reuqirement. What I have : A bunch of PDF files. A set of keywords. What I am trying to achieve : Index the PDF files (solrcell - done) Search for a keyword (works ok) Tailor the output to spit out the names of the PDF files, an excerpt where the keyword occurred (No clue/idea how to) Tried manipulating ResponseHandler/Schema.xml/Solrconfig.xml to no avail. Lucene/solr experts, do you think what I am trying to achieve is

问题 I saw an example code as below If numb Like "[0-9]" Then End If Here numb is a string holding one character. What is the LIKE keyword in VB6? Is there any documentation available? 回答1: Like Operator (Visual Basic for Applications Reference) Used to compare two strings. Syntax: result = string Like pattern 回答2: To have "Like" comparing the string "ABC", you must use * to mean "0 or any number of". E.g: "ABC" Like "[A-Z]" results FALSE because "ABC" is not a 1-char long string, but "ABC" Like "

问题 I'm working through the book Head First C# (and it's going well so far), but I'm having a lot of trouble wrapping my head around the syntax involved with using the "this." keyword. Conceptually, I get that I'm supposed to use it to avoid having a parameter mask a field of the same name, but I'm having trouble actually tracking it through their examples (also, they don't seem to have a section dedicated to that particular keyword, they just explain it and start using it in their examples).

问题 How can I use php to categorise different keywords together for example to consider shoes, boots, nike, etc in the similar categories. Any code would be appreciated. 回答1: (Warning: a fundamentalist approach) Go to http://commons.media.mit.edu/ and http://www.cyc.com/cyc/opencyc. These are two open databases of common sense. Make several searches by categories you're interested in. You'll get some related terms for each category. Put it in a fast database of your liking, and you're set. Also,

问题 Is there a keyword to refer to the current class type similar to how this refers to the current instance? My intention is to avoid having to type the full class name when refering to static members or Enums but I want to prefex it with something like "this" for readability like I do for instance members. The reason being some of the class names are pretty huge and cause excessive wrapping. 回答1: I don't think there's a keyword, but maybe as good: this.GetType(); GetType is one of the few