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<h2 class="blog-post-title">Measure-Total</h2>
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<span class="blog-post-time">2009-04-15</span> by <a class="blog-post-author">Joel Bennett</a>
</p>
<h3>Download <a href="https://poshcode.org/scripts/1031.ps1">Measure-Total.ps1</a></h3>
<p>A general-purpose function for generating a "totals" row for data with numeric properties.</p>
<pre><code class="language-powershell">#.Synopsis
# Calculate sums on top of Measure-Object
#.Description
# Pipe in objects with numerical properties, and get an extra output item
# with the sum of all the specified properties
#.Parameter Property
# The names of the properties to total
#.Example
# wc *.ps1 | total words, lines
#
# Calculates line, word, and character counts for powershell script files in the current directory,
# and THEN adds a total row with totals for words and lines (but not Chars)
#.Example
# wc *.rb | total
#
# Calculates line, word, and character counts for rubyscript files in the current directory,
# and THEN adds a total row with totals for ALL NUMERIC PROPERTIES ;-)
function measure-total {
PARAM([string[]]$property)
END {
$input # output the input
## "Magically" figure out the numeric properties
if(!$property) {
$input.reset()
$property = $input | gm -type Properties |
where { trap{continue} ( new-object "$(@($_.Definition -split " ")[0])" ) -as [double] -ne $null } |
foreach { $_.Name }
$input.reset()
}
$input.reset()
# then calculate the sum of the numeric properties
$sum = $input | measure $property -sum -erroraction 0
# and make a new object to hold the sums
$output = new-object PSObject
$sum | % { Add-Member -input $output -Type NoteProperty -Name $_.Property -Value $_.Sum }
$output # output the output
}}
new-alias total measure-total
</code></pre>
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