Pogo's async operator, `!`

ls.pogo

fs = require 'fs'

filenames = fs.readdir! '.'

stats = [f <- filenames, size = fs.stat (f)!.size, {filename = f, size = size}]

for each @(stat) in (stats)
    console.log "#(stat.filename): #(stat.size)"

console.log ()
console.log "#(filenames.length) files in total"

output

three: 4128
one: 4630
two: 3130

3 files in total

This script makes for a simple (unix) ls command, but examines the file stats concurrently.

The script uses a combination of list comprehensions and the async operator ! to make concurrent calls to fs.stat().