Reply to https://www.reddit.com/r/PowerShell/comments/3wfrj4/load_multiple_inputs_or_arrays_into_a_single/

multiple-array-join.ps1

$data = @{}

Import-Csv namecity.csv |
    ForEach-Object {
        if (-not $data[$_.name]) { $data[$_.name] = @{} }
        $data[$_.name]["city"] = $_.city
    }

Import-Csv namestate.csv |
    ForEach-Object {
        if (-not $data[$_.name]) { $data[$_.name] = @{} }
        $data[$_.name]["state"] = $_.state
    }

Import-Csv namecountry.csv |
    ForEach-Object {
        if (-not $data[$_.name]) { $data[$_.name] = @{} }
        $data[$_.name]["country"] = $_.country
    }

# Make use of this object format, or...

# Flatten data into tabular format
$data.Keys | ForEach-Object {
    $Properties = [ordered]@{
        name = $_
        city = $data[$_].city
        state = $data[$_].state
        country = $data[$_].country
    }
    New-Object psobject -Property $Properties
} # Pipe here to Export-Csv, ConvertTo-Html or just emit objects or whatever

namecity.csv

namecountry.csv

namestate.csv