interpreter

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Is there an online interpreter like http://codepad.org/ or http://www.trypython.org/ which uses Python 3? Answer Since the question is

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Is there an online interpreter like http://codepad.org/ or http://www.trypython.org/ which uses Python 3? Answer Since the question is

问题 Is there any function / global variable in PHP that returns the current state of the script (something like runnning, terminating)? Or is the only way to set this state by making use of register_shutdown_function()? That function looks inflexible to me as an already registered shutdown functions can be overriden with it. And the shutdown function gets executed when a user aborts the connection, which is not what I'm looking for explicitly and I don't want to introduce too many constraints.

问题 I'm executing with pycharm the following: print(os.environ["PATH"]) # returns '/usr/bin:/bin:/usr/sbin:/sbin' But when I execute echo $PATH in a shell this is returned: /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/local/bin:/opt/local/sbin I tried to edit it in Preferences > Console > Python Console > Environment Variables, setting PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/local/bin:/opt/local/sbin but this is not

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Sometimes it's nice to open an interpreter, type out some code and see if it's working, rather than having to compile something large like an Xcode project just to quickly test something. Does an Objective-C Interpreter exist for the Mac, or am I out of luck? UPDATE: There's a paid program in the App Store

问题 What are the differences between a Just-in-Time-Compiler and an Interpreter, and are there differences between the .NET and the Java JIT compiler? 回答1: Just-in-time compilation is the conversion of non-native code, for example bytecode, into native code just before it is executed. From Wikipedia: JIT builds upon two earlier ideas in run-time environments: bytecode compilation and dynamic compilation. It converts code at runtime prior to executing it natively, for example bytecode into native

问题 I've read the whole Dragon Book recently (just for fun, I'm not really planning to implement an actual compiler), and I was left with this big question dangling in my head. What is different between implementing a compiler and an interpreter? To me a compiler is made up of: Lexer Parser (which builds the syntax tree) Generate Intermediate code (like 3 address code) Do all these crazy things to optimize if you want :-) Generate "assembly" or "native code" from the 3 address code. Now,

问题 Alan Kay said that reading the code closely and finding the 1 and only bug in the code on page 13 of the Lisp 1.5 manual, helped him understand Computer Science by a factor of 100 better. The code in question is the 1st release of eval & apply that looks anything remotely like modern lisp (that I'm aware of). Since the correct answer is likely known but lost (my google-fu is decent and I've searched for 20 mins at least) I will award the 1st correct answer (I will be looking at edit times so

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I've been wanting to play around with writing my own language for a while now (ostensibly for the learning experience) and as such need to be relatively grounded in the construction of Parsers, Interpreters, and Compilers. So: Does anyone know of any good resources on constructing Parsers, Interpreters, and

问题 I was just thinking to myself "How exactly is a PHP script executed?" I thought it was parsed first for syntax errors etc, and then interpreted and executed. However, I don't know why I believe that is correct. I'm probably wrong. So, how exactly is a PHP file interpreted and executed? What stages does this involve? How do included files fit into the parsing of the script? This is just to help me get my head around it. I'm interested and can not find a good answer with Google. 回答1: PHP is a