Command-line argument parsing: Difference between revisions

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Line 8:

An example of [[C (programming language)|C]] argument parsing would be:

<syntaxhighlight lang="Cc">

#include <stdio.h>

int main (int argc, char *argv[])

{

int count;

for (count = 0; count < argc; count++)

puts (argv[count]);

}

</syntaxhighlight>

C also has functions called [[getopt]] and getopt_long.

===C#===

An example of [[C Sharp (programming language)|C#]] argument parsing would be:

<syntaxhighlight lang="csharp">

class Program

{

static void Main(string[] args)

{

foreach (var arg in args)

Console.WriteLine(arg);

}

}

</syntaxhighlight>

===Java===

Line 30 ⟶ 43:

}

</syntaxhighlight>

===Kotlin===

Here are some possible ways to print arguments in [[Kotlin (programming language)|Kotlin]]:<ref>{{cite web|url=https://kotlinlang.org/docs/basic-syntax.html#program-entry-point |title=Kotlin: Basic syntax |date= |accessdate=2022-05-13}}</ref>:

<syntaxhighlight lang="kotlin">

Line 49 ⟶ 61:

}

</syntaxhighlight>

===Perl===

Line 55 ⟶ 66:

<syntaxhighlight lang="perl">

foreach $arg (@ARGV)GT

{

print $arg;

}

</syntaxhighlight>FT

or

<syntaxhighlight lang="perl">

foreach $argnum (0 .. $#ARGV)ST

{

print $ARGV[$argnum];

Line 85 ⟶ 96:

<syntaxhighlight lang="php">

$args = parseArgs($argv);

echo getArg($args, '"foo'");

function parseArgs(array $args)

{

foreach ($args as $arg) {

$tmp = explode('":'", $arg, 2);

if ($arg[0] === '"-'") {

$args[substr($tmp[0], 1)] = $tmp[1];

}

Line 159 ⟶ 170:

</syntaxhighlight>

===Node.jsRust===

The args are in <code>env::args()</code>.<ref>{{cite web |title=Accepting Command Line Arguments - The Rust Programming Language |url=https://doc.rust-lang.org/book/ch12-01-accepting-command-line-arguments.html |website=doc.rust-lang.org |access-date=22 December 2022}}</ref>

<syntaxhighlight lang="rust">

use std::env;

fn main() {

let args: Vec<String> = env::args().collect();

let query = &args[1];

let file_path = &args[2];

println!("Searching for {}", query);

println!("In file {}", file_path);

}

</syntaxhighlight>

===JavaScript===

====Node.js====

[[JavaScript]] programs written for [[Node.js]] use the <code>process.argv</code> global variable.<ref>{{cite web|title=process.argv|work=Node.js v10.16.3 Documentation|url=https://nodejs.org/docs/latest-v10.x/api/process.html#process_process_argv|accessdate=3 October 2019}}</ref>

Line 191 ⟶ 219:

'two=three',

'four' ]

</syntaxhighlight>

====Bun====

JavaScript written for [[Bun (software)|Bun]] use <code>Bun.argv</code> and the <code>util.parseArgs</code> function.<ref>{{cite web |title=Parse command-line arguments {{!}} Bun Examples |url=https://bun.sh/guides/process/argv |website=Bun |language=en}}</ref>

<syntaxhighlight lang="javascript">

console.log(Bun.argv);

</syntaxhighlight>

====Deno====

JavaScript written for [[Deno (software)|Deno]] use <code>Deno.args</code><ref>{{cite web |title=Deno.args |url=https://docs.deno.com/api/deno/~/Deno.args |website=docs.deno.com}}</ref> and the <code>parseArgs</code> function.<ref>{{cite web |title=parseArgs from parse-args - @std/cli - JSR |url=https://jsr.io/@std/cli/doc/parse-args/~/parseArgs |website=jsr.io |language=en}}</ref>

<syntaxhighlight lang="javascript">

console.log(Deno.args);

</syntaxhighlight>