Warm tip: This article is reproduced from serverfault.com, please click
for-loop powershell parameter-passing

Powershell accessing multiple parameters in a for loop

发布于 2014-11-28 19:08:29

Hi I am very new to powershell and I am writing a script that accepts multiple parameters. These parameters are being accessed in a for loop inside the file. It looks something like this

$numOfArgs = args.Length
for ($i=3; $i -le $numOfArgs; $i++)
{


   write-host "folder: $args[$i]"
   # does something with the arguments

}

However, the output gives me all the parameters as a whole instead of just one parameter specified in the array as an array element? Can someone tell me where is the mistake here? Thanks!

Questioner
user3351901
Viewed
0
分享
Micky Balladelli 2014-11-29 03:19:28

EDIT: Thanks Duncan to point this out, missing a $ in a variable.

Try this:

$numOfArgs = $args.Length
for ($i=3; $i -le $numOfArgs; $i++)
{
   write-host "folder: $($args[$i])"
   # does something with the arguments
}

When placing a variable in a string, the variable is evaluated, not the entire expression. So by surrounding it with $() Powershell will evaluate the whole expression.

In other words, only $args was evaluated instead of $args[$i]

Duncan 2014-11-28 19:21:53

You need a $ in the first line: $args.Length I tried adding it for you but it got overwritten when you improved your answer.

热门github

1
Implementation of paper - YOLOv9: Learning What You Want to Learn Using Programmable Gradient Information
2
A Windows and Office activator using HWID / Ohook / KMS38 / Online KMS activation methods, with a focus on open-source code and fewer antivirus detections.
3
Get up and running with Llama 2, Mistral, Gemma, and other large language models.
4
该项目可以让你通过订阅的方式使用Cloudflare WARP+，自动获取流量。This project enables you to use Cloudflare WARP+ through subscription, automatically acquiring traffic.
5
Multi functional app to find duplicates, empty folders, similar images etc.
6
Xray panel supporting multi-protocol multi-user expire day & traffic & ip limit (Vmess & Vless & Trojan & ShadowSocks & Wireguard)
7
The Free Software Media System
8
lightweight, standalone C++ inference engine for Google's Gemma models.
9
📚 Freely available programming books
10
A collective list of free APIs
11
1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java
12
🎓 Path to a free self-taught education in Computer Science!
13
Curso para aprender el lenguaje de programación Python desde cero y para principiantes. 75 clases, 37 horas en vídeo, código, proyectos y grupo de chat. Fundamentos, frontend, backend, testing, IA...
14
This repository contains System Design resources which are useful while preparing for interviews and learning Distributed Systems
15
Mamba is a new state space model architecture showing promising performance on information-dense data such as language modeling, where previous subquadratic models fall short of Transformers. It is based on the line of progress on structured state space models, with an efficient hardware-aware design and implementation in the spirit of FlashAttention.