runtime

问题 I am calling java.lang.Runtime.exec(...) but this seems to accept the command lines as an array and I want to use a single string. How can I do the same using a single string? 回答1: From the linked Javadocs: envp - array of strings, each element of which has environment variable settings in the format name=value , or null if the subprocess should inherit the environment of the current process. So just pass in null for the second parameter, and the environment will be inhereted. 回答2: If you

问题 I want to execute the following command in a java program. But it execute only the first part. the part after | is not executed Process process = Runtime.getRuntime().exec(" adb devices | tail -n +2 | cut -sf 1"); process.waitFor(); 回答1: You need to run that in a shell. Try this: Process process = Runtime.getRuntime().exec(new String[] { "/bin/sh", "-c", "adb devices | tail -n +2 | cut -sf 1" }); process.waitFor(); 回答2: Use a script instead because Pipe itself is a part of the shell. OR do

问题 I usually run Runtime#availableProcessors to determine how many cores on a Windows computer and it works fine. The result is consistent with that I found from control panel. However when I applied the API on a Linux server, it returns 1 . As I know the server is more powerful it doesn't make sense to me it's a single cpu system. I did some search and found the Linux box is Intel(R) Xeon(R) CPU X5675 @ 3.07GHz , googling shows it has 6 cpu cores. Then the question is, why Runtime

问题 I'm sure it will be per user - but - is the maximum script runtime in a 24 hour period, for 'Google Apps For Business' 6 hours per user or 6 hours for all users on the account. Thanks EDIT: more detail of my particular situation OK. Still unclear. The web link to Google of quotas doesn't make it clear - it just says 6 hours. So 6 hours each with 8000 users is a massive amount but conversely 6 hours between 8000 users is tiny. My particular situation is a script runs via an installable time

问题 I am currently working on an MVC web app with MEF so that a) developers can develop plugins for the website, and users can elect which plugins they want on their account. This means that some of my composition has to happen after the app has already started and the user has logged in (which goes to the database, grabs the assemblies for the plug in and adds them to the current catalog). The way it works is I have a couple of libraries that I store in the database and pull out when the user

问题 I want to proxy an API over a network. I have the API in a dictionary. I'd like to create a class with the API methods from the dictionary so I can use the API as if I was local. The trouble is finding the name of my dynamically created method. (My approach is based on Adding a Method to an Existing Object and Python dynamic class methods.) class MainClass(object): def build_API(self): methods = dict(meth1='arg1', meth2='arg2') for key in methods.iterkeys(): setattr(self, key, MethodType(self

问题 I want to proxy an API over a network. I have the API in a dictionary. I'd like to create a class with the API methods from the dictionary so I can use the API as if I was local. The trouble is finding the name of my dynamically created method. (My approach is based on Adding a Method to an Existing Object and Python dynamic class methods.) class MainClass(object): def build_API(self): methods = dict(meth1='arg1', meth2='arg2') for key in methods.iterkeys(): setattr(self, key, MethodType(self

问题 I need to call the co-class function by reading its address from vtable of COM exposed interface methods. I need some generic way to read addresses. Now I need to call the function, which would have specific address(NOT KNOWN) arguments(parameters) which I have collected from TLB, and name as well. How that address corresponds to that function name to which I am going to call. For this I need to traverse vtable which is holding functional addresses, LASTLY need to correspond function address

问题 I am trying to view what the run-time on my code is. The code is my attempt at Project Euler Problem 5. When I try to output the run time it gives 0ns. #define MAX_DIVISOR 20 bool isDivisible(long, int); int main() { auto begin = std::chrono::high_resolution_clock::now(); int d = 2; long inc = 1; long i = 1; while (d < (MAX_DIVISOR + 1)) { if ((i % d) == 0) { inc = i; i = inc; d++; } else { i += inc; } } auto end = std::chrono::high_resolution_clock::now(); printf("Run time: %llu ns\n", (std:

问题 This is a similar question to Linear Probing Runtime but it regards quadratic probing. It makes sense to me that "Theoretical worst case is O(n)" for linear probing because in the worst case, you may have to traverse through every bucket(n buckets) What would runtime be for quadratic probing? I know that quadratic probes in a quadratic fashion -1, 4, 9, 16, ..... My initial thought was that it's some variation of log n(exponential) but there isn't a consistent base. 回答1: If there are n - 1