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Created July 5, 2011 17:56
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A few examples will help to clarify these operations. Let's begin by creating two arrays:
operating_systems = ["Fedora", "SuSE", "RHEL", "Windows", "MacOS"]
linux_systems = ["RHEL", "SuSE", "PCLinuxOS", "Ubuntu", "Fedora"]
Now, we can create a union of the two arrays:
operating_systems | linux_systems
=> ["Fedora", "SuSE", "RHEL", "Windows", "MacOS", "PCLinuxOS", "Ubuntu"]
As we can see from the above output, the union operation joined one array to another, but removed any duplicate array elements.
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