I was recently working on a script for a co-worker who is trying to learn more powershell. In the script I had used a couple of hashtables to store information…which caused a couple of questions as he was reviewing the code. This post is an introduction to powershell hashtables.<\/p>\n
A hashtable stores indexed key-value pairs in memory and is similar to the vbscript dictionary object. To help describe these concepts, I have listed a few examples based on a CSV file containing HTML color codes<\/a>.<\/p>\n The examples below will: I was recently working on a script for a co-worker who is trying to learn more powershell. In the script I had used a couple of hashtables to store information…which caused a couple of questions as he was reviewing the … Continue reading
\n1.) Import the CSV into a powershell array object,
\n2.) Show how to use the array object to return a specific code given a color name
\n3.) Convert the object from step 1 into a hashtable
\n4.) Show how to use the hashtable to return a specific code given a color name<\/p>\n\r\n# Example 1:\r\n$colorCodes = Import-Csv ColorCodes.csv\r\n\r\n# Example 2:\r\n# Using just the array object created from Import-CSV\r\n# we can select the color code for Red with just one line\r\n($colorCodes | Where-Object {$_.ColorName -eq 'Red'}).Code\r\n\r\n# Example 3:\r\n# We could also create a hash table and store each item\r\n# from the array using a couple lines of code\r\n$colorCodeHT = @{}\r\n$colorCodes | %{ $colorCodeHT.Add($_.ColorName, $_.Code) }\r\n\r\n# Example 4\r\n# And then we can retreive the code for red using either of the\r\n# examples below. Note: you only need one as they return the same\r\n# value. The first sample is my preferred method, but either works.\r\n$colorCodeHT['Red']\r\n$colorCodeHT.Item('Red')\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"