PowerShell primers

More PowerShell: Hash tables

Using arcane text-based syntax to achieve miraculous results

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In this next installment of my ongoing PowerShell series, I want to focus on putting PowerShell objects to work for you. Let me warn you in advance, however: Put on your advanced thinking caps for this piece, especially if you are a non-programmer or non-developer and are used to pointing at things and clicking them once or twice to accomplish some tasks. I'm going to get abstract with you here but, as far as I know, there is no way around it.

The subject? Hash tables; these are *very* useful tools to have in your arsenal. It just takes a while to both (a) understand them and their use fully and (b) wrap your head around the **extremely funky** syntax that they use. Really, the syntax is unforgiveable. I'm going to try to simplify things as much as possible.

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Hash tables are a fancy way of saying "A table full of single pieces of information many times over." Those single pieces of information are known as name-value pairs, or key-value pairs as you might sometimes see them called. These pairs store a single piece of data; the key is the descriptive word about the data and the value is the actual piece of data.

A common example of key-value pairs are a list of American states and their capitals. We might call our key-value pair table "StateCapitals," for instance, and then within that table, each state would be the key, and each state's capital would be the value.

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