I want my script to be able to take an optional input, e.g. currently my script is #!/bin/bash somecommand foo but I would like it to say: #!/bin/bash somecommand [ if $1 exists, $1, else, foo ] 8 s 8
This question already has answers here: What’s the difference between an argument and a parameter? (36 answers) Arguments or parameters? [duplicate] (12 answers) Closed 2 years ago. I got parameter and argument kind of mixed up and did not really pay attention to when to use one and when to use the other. Can you … Read more
I was wondering about the best practices for indicating invalid argument combinations in Python. I’ve come across a few situations where you have a function like so: def import_to_orm(name, save=False, recurse=False): “”” :param name: Name of some external entity to import. :param save: Save the ORM object before returning. :param recurse: Attempt to import associated … Read more
This question already has answers here: Set a default parameter value for a JavaScript function (29 answers) Closed 5 years ago. I’ve always handled optional parameters in JavaScript like this: function myFunc(requiredArg, optionalArg){ optionalArg = optionalArg || ‘defaultValue’; // Do stuff } Is there a better way to do it? Are there any cases where … Read more
When verbally talking about methods, I’m never sure whether to use the word argument or parameter or something else. Either way the other people know what I mean, but what’s correct, and what’s the history of the terms? I’m a C# programmer, but I also wonder whether people use different terms in different languages. For … Read more
I am trying to search how to pass parameters in a Bash function, but what comes up is always how to pass parameter from the command line. I would like to pass parameters within my script. I tried: myBackupFunction(“..”, “…”, “xx”) function myBackupFunction($directory, $options, $rootPassword) { … } But the syntax is not correct. How … Read more
I need to pass an ID and a password to a batch file at the time of running rather than hardcoding them into the file. Here’s what the command line looks like: test.cmd admin P@55w0rd > test-log.txt 20 20
Say, I have a script that gets called with this line: ./myscript -vfd ./foo/bar/someFile -o /fizz/someOtherFile or this one: ./myscript -v -f -d -o /fizz/someOtherFile ./foo/bar/someFile What’s the accepted way of parsing this such that in each case (or some combination of the two) $v, $f, and $d will all be set to true and … Read more
I would like a JavaScript function to have optional arguments which I set a default on, which get used if the value isn’t defined (and ignored if the value is passed). In Ruby you can do it like this: def read_file(file, delete_after = false) # code end Does this work in JavaScript? function read_file(file, delete_after … Read more
I have a web server written in Node.js and I would like to launch with a specific folder. I’m not sure how to access arguments in JavaScript. I’m running node like this: $ node server.js folder here server.js is my server code. Node.js help says this is possible: $ node -h Usage: node [options] script.js … Read more