command-line-arguments

问题 Is there a way how to set that certain flags are mandatory, or do I have to check for their presence on my own? 回答1: The flag package does not support mandatory or required flags (meaning the flag must be specified explicitly). What you can do is use sensible default values for (all) flags. And if a flag is something like there is no sensible default, check the value at the start of your application and halt with an error message. You should do flag value validation anyway (not just for

问题 I have a program which will read everything from config.properties file if command line does not contain any arguments apart from config.properties file location. Below is my config.properties file- NUMBER_OF_THREADS: 100 NUMBER_OF_TASKS: 10000 ID_START_RANGE: 1 TABLES: TABLE1,TABLE2 If I am running my program from the command prompt like this- java -jar Test.jar "C:\\test\\config.properties" It should read all the four properties from the config.properties file. But suppose if I am running

问题 My program is supposed to read an encrypted file from the command-line, but I don't know how to pass command-line arguments. These are the instructions: *A shift cipher is a very basic cryptographic algorithm in which encryption is performed by substituting each character in the plaintext with the character that's a fixed number of characters (i.e. the shift value) later in the alphabet. For example, if our shift value is 2, the plaintext cabbage becomes ecddcig. It's easy to see that shift

问题 I am trying to execute my python script in java using jython. The important thing is that I need to pass command line arguments to my script using jython, e.g. myscript.py arg1 arg2 arg3. There is a similar question here: Passing arguments to Python script in Java Which was not answered completely (none of the solutions work). My code now looks like this: String[] arguments = {"arg1", "arg2", "arg3"}; PythonInterpreter.initialize(props, System.getProperties(), arguments); org.python.util

问题 I have a C program that reads command line arguments from argv. Is it possible to make a pipe to redirect the contents of a file as command line arguments to my program? Suppose I have a file arguments.dat with this content: 0 0.2 302 0 And I want my program to be called with: ./myprogram 0 0.2 302 0 I tried the following: cat arguments.dat | ./myprogram without success. 回答1: With most shells, you can insert the contents of a file into a command line with $(<filename) : ./myprogram $(

问题 I have a doubt @ the storage of command line arguments. myprog.exe -cfgfile myconfig.cfg commandline args are passed when process gets created so are they strored outside the process? where OS stores it? 回答1: For WIndows, the command line arguments are kept in the process environment block (PEB), which is allocated in the user process address space when the process is created. You can read Windows Internals for a lot more details. Here's a snippet from Chapter 5 - Processes, Threads, and Jobs

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I have an enum for 25 applications and an enum for some environments. Right now with the code I have I can either pass no arguments and it runs all of the application in all of the environments(which is what I want) or I can pass one app and one environment in that order it will run that. I need to

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I have an enum for 25 applications and an enum for some environments. Right now with the code I have I can either pass no arguments and it runs all of the application in all of the environments(which is what I want) or I can pass one app and one environment in that order it will run that. I need to

问题 I have a windows forms based application made by another programmer and I need to add a few command line switches to it's primary output exe so that I can pass arguments like: program.exe -reinitialise or program.exe -sync I have found some docs online but all seem to be in C# and are for command line only programs. This program installs via an .msi and the .exe is only constructed at the end. So my questions are: How do I add command line switches to a VB.Net application? Where/What form do

问题 I am trying to make a Python program that uses the argparse module to parse command-line options. I want to make an optional argument that can either be named or positional. For example, I want myScript --username=batman to do the same thing as myScript batman . I also want myScript without a username to be valid. Is this possible? If so, how can it be done? I tried various things similar to the code below without any success. parser = argparse.ArgumentParser() group = parser.add_mutually