interpretation

interpret Parigot's lambda-mu calculus in Haskell

由 ☆樱花仙子☆ 提交于 2019-12-21 01:06:13
问题 One can interpret the lambda calculus in Haskell: data Expr = Var String | Lam String Expr | App Expr Expr data Value a = V a | F (Value a -> Value a) interpret :: [(String, Value a)] -> Expr -> Value a interpret env (Var x) = case lookup x env of Nothing -> error "undefined variable" Just v -> v interpret env (Lam x e) = F (\v -> interpret ((x, v):env) e) interpret env (App e1 e2) = case interpret env e1 of V _ -> error "not a function" F f -> f (interpret env e2) How could the above

Online c# interpreter security issues

由 我只是一个虾纸丫 提交于 2019-12-18 13:26:30
问题 I am toying around with the idea of building an online C# interpreter, a bit like Codepad. Now there are obvious security issues: Infinite loops System.Diagnostics.Process.Start Pretty much the whole System.IO namespace My knowledge of C# isn't exactly insignificant, but I'm sure there are a lot that know much more about it, plus the stuff I didn't think about. What would you be careful about? A few precisions, I plan on running this on a small Linux VPS using Mono. 回答1: Use Mono's Compiler

Is Java a Compiled or an Interpreted programming language ?

由 这一生的挚爱 提交于 2019-12-17 02:39:06
问题 In the past I have used C++ as a programming language. I know that the code written in C++ goes through a compilation process until it becomes object code "machine code". I would like to know how Java works in that respect. How is the user written Java code run by the computer? 回答1: Java implementations typically use a two-step compilation process. Java source code is compiled down to bytecode by the Java compiler. The bytecode is executed by a Java Virtual Machine (JVM). Modern JVMs use a

redirect every request to index.php and interpret the request

由 霸气de小男生 提交于 2019-12-14 02:23:50
问题 I'm using Apache 2.2 and PHP 5.3.8. How should I configure .htaccess to redirect every request do index.php? I'd like to have URLs like those of stackoverflow or facebook, as: http://mywebsite.com/fancypage where fancypage isn't a directory on the server but just a parameter. So I thought I needed to redirect every request to a php page, where some code can interpret the $_SERVER['REQUEST_URI'] string. Is this the right way? will $_SERVER['REQUEST_URI'] still be available after the

Does PHP interpret code in the same way that JavaScript does? [closed]

由 爷，独闯天下 提交于 2019-12-11 20:29:13
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 6 years ago . Does PHP interpret code in the same way that JavaScript does? Upon some research, I've gathered that JavaScript programs are run in a so-called 'two-pass' read. The first run gets the syntax and function definitions of the program. ('Parses' the data so to speak), and the second

Decode and dispatch interpretation vs Threaded interpretation

由 左心房为你撑大大i 提交于 2019-12-04 17:36:09
问题 I am trying to understand the practical difference during the execution of a program in Decode and dispatch interpretation and Threaded interpretation . Example of both will really help. I understand how Java bytecode works and how an assembly language works. But where does DDI and TI fit in? Context: Virtual machines: versatile platforms for systems and processes 回答1: (Note: I'll assume that by "decode and dispatch" you mean a switch-based interpreter.) The difference between a switch-based

Decode and dispatch interpretation vs Threaded interpretation

由 瘦欲@ 提交于 2019-12-03 11:35:55
I am trying to understand the practical difference during the execution of a program in Decode and dispatch interpretation and Threaded interpretation . Example of both will really help. I understand how Java bytecode works and how an assembly language works. But where does DDI and TI fit in? Context: Virtual machines: versatile platforms for systems and processes (Note: I'll assume that by "decode and dispatch" you mean a switch-based interpreter.) The difference between a switch-based and a threaded interpreter at run time is, basically, the number of jumps that are performed. In a switch

What is the difference between compilation and interpretation?

由 三世轮回 提交于 2019-12-03 03:56:40
问题 I just had a conversation with a colleague and where were talking about the V8 JavaScript engine. According to Wikipedia, V8 compiles JavaScript to native machine code [...] before executing it, instead of more traditional techniques such as interpreting bytecode or compiling the whole program to machine code and executing it from a filesystem. where (correct me if I'm wrong) " interpreting bytecode " is the way Java works, and " compiling the whole program " would apply for languages like C

What is the difference between compilation and interpretation?

由 霸气de小男生 提交于 2019-12-02 17:18:40
I just had a conversation with a colleague and where were talking about the V8 JavaScript engine. According to Wikipedia, V8 compiles JavaScript to native machine code [...] before executing it, instead of more traditional techniques such as interpreting bytecode or compiling the whole program to machine code and executing it from a filesystem. where (correct me if I'm wrong) " interpreting bytecode " is the way Java works, and " compiling the whole program " would apply for languages like C or C++. Now we were wondering, debating and posing false assertions and presumptions about differences,

HTTP: What is the preferred Accept-Encoding for “gzip,deflate”?

由 那年仲夏 提交于 2019-11-30 20:37:57
This question is regarding the order of precedence for the media-types of the HTTP Header "Accept-Encoding" when all are of equal weight and has been prompted by this comment on my blog. Background: The Accept-Encoding header takes a comma separated list of media-types the browser can accept e.g. gzip,deflate A quality factor can also be specified to give preference to other media-types e.g. in the case of "gzip;q=.8,deflate", deflate is preferred - but is not relevant to this question . NB: A type with a "q=0" means "not acceptable". RFC2616 also states that the "most specific reference" for
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