Running a piped command via backquotes
Strings and Regular Expressions example from a Well House Consultants training course
More on Strings and Regular Expressions [link]
Source code: d4_7 Module: R109
# Running a piped command via backquotes
# Run a command and store result string in a variable
result = `ls -l`
# sample line from result:
# -rw-r--r-- 1 wellho apache 1170 2010-01-31 06:42 regex_sub.rb
# Analyse that string ... split into an array line by line
lines = result.split "\n"
for record in lines
# Split each line into a series of fields
fields = record.split /\s+/
printf "%12s %10s %s\n", fields,fields,fields
-bash-3.2$ ruby d4_7
-rw-r--r-- 2544 bc
-rw-r--r-- 426 d4_1
-rw-r--r-- 2457 d4_6
-rw-r--r-- 489 d4_7
-rw-r--r-- 1777 d4_8
-rw-r--r-- 422 e2
-rw-r--r-- 1797 finder
-rw-r--r-- 750 gerald.txt
-rw-r--r-- 766 heredocs.rb
-rw-r--r-- 1285 ii
-rw-r--r-- 1915 kiddos
-rw-r--r-- 2143 kids
-rw-r--r-- 474 mlre.rb
-rw-r--r-- 1498 pareea
-rw-r--r-- 386 pc
-rw-r--r-- 1170 regex_sub.rb
-rw-r--r-- 852 rex1.rb
-rw-r--r-- 301 rex2.rb
-rw-r--r-- 414 shalt
-rw-r--r-- 498 sop.rb
-rw-r--r-- 815 stdo.rb
-rw-r--r-- 752 str_types.rb
-rw-r--r-- 796 vest
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