From f30491f6faa8b62e45efcf8d38aa5c8ba0865a80 Mon Sep 17 00:00:00 2001
From: koalaman <vidar@vidarholen.net>
Date: Mon, 5 Jun 2017 16:26:02 -0700
Subject: [PATCH] Updated SC2002 (markdown)

---
 SC2002.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/SC2002.md b/SC2002.md
index 420ac82..5c8f3be 100644
--- a/SC2002.md
+++ b/SC2002.md
@@ -3,15 +3,15 @@
 ### Problematic code:
 
 ```sh
-cat file | tr ' ' _ | grep a_
-cat file | ( while read i; do echo "${i%?}"; done )
+cat file | tr ' ' _ | nl
+cat file | while IFS= read -r i; do echo "${i%?}"; done
 ```
 
 ### Correct code:
 
 ```sh
-< file tr ' ' _ | grep a_  # **simple commands only, won't work with compounds
-( while read i; do echo "${i%?}"; done ) < file # postfix works for everything
+< file tr ' ' _ | nl  
+while IFS= read -r i; do echo "${i%?}"; done < file
 ```
 
 ### Rationale:
@@ -24,4 +24,4 @@ Many tools also accept optional filenames, e.g. `grep -q foo file` instead of `c
 
 ### Exceptions
 
-None.
+Pointing out UUOC is a long standing shell programming tradition, and removing them from a short-lived pipeline in a loop can speed it up by 2x. However, it's not necessarily a good use of time in practice, and rarely affects correctness. [[Ignore]] as you see fit.
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