C# check if you have passed arguments or not
if(args.Length==0) should work, args[0] requires at least one argument to not crash.
args
accessing the $args array in powershell
Try this instead: function test_args() { Write-Host “here’s arg 0: $($args[0])” Write-Host “here’s arg 1: $($args[1])” } test_args foo bar Note that it is $args and not $arg. Also when you use a PowerShell variable in a string, PowerShell only substitutes the variable’s value. You can’t directly use an expression like $args[0]. However, you can … Read more
How do you pass arguments from command line to main in Flutter/Dart?
There is no way to do that, because when you start an app on your device there are also no parameters that are passed. If this is for development, you can pass -t lib/my_alternate_main.dart to flutter run to easily switch between different settings where each alternate entry-point file calls the same application code with different … Read more
Parsing arguments to a Java command line program
Use the Apache Commons CLI library commandline.getArgs() to get arg1, arg2, arg3, and arg4. Here is some code: import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.Option; import org.apache.commons.cli.Options; import org.apache.commons.cli.Option.Builder; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.DefaultParser; import org.apache.commons.cli.ParseException; public static void main(String[] parameters) { CommandLine commandLine; Option option_A = Option.builder(“A”) .required(true) .desc(“The A option”) .longOpt(“opt3”) .build(); Option option_r = Option.builder(“r”) .required(true) … Read more
Use of *args and **kwargs [duplicate]
The syntax is the * and **. The names *args and **kwargs are only by convention but there’s no hard requirement to use them. You would use *args when you’re not sure how many arguments might be passed to your function, i.e. it allows you pass an arbitrary number of arguments to your function. For … Read more