From 4d7333cb68bdf52bb948c09880eb54001e12d46b Mon Sep 17 00:00:00 2001
From: Mingye Wang <arthur200126@gmail.com>
Date: Wed, 30 Sep 2015 09:37:05 -0400
Subject: [PATCH] Updated SC2031 (markdown)

---
 SC2031.md | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/SC2031.md b/SC2031.md
index 61854a1..7dbcc62 100644
--- a/SC2031.md
+++ b/SC2031.md
@@ -4,18 +4,22 @@
 
 There are many ways of accidentally creating subshells, but a common one is piping to a loop:
 
-    n=0
-    printf "%s\n" {1..10} | while read i; do (( n+=i )); done
-    echo $n
+```bash
+n=0
+printf "%s\n" {1..10} | while read i; do (( n+=i )); done
+echo $n
+```
 
 ### Correct code:
 
-    # Bash specific:
-    n=0
-    while read i; do (( n+=i )); done <   <(printf "%s\n" {1..10})
-    echo $n
+```bash
+# Bash specific: process substitution. Also try shopts like lastpipe.
+n=0
+while read i; do (( n+=i )); done < <(printf "%s\n" {1..10})
+echo $n
+```
 
-In `sh`, a temp file can be used instead of process substitution. 
+In `sh`, a temp file (better if fifo or fd) can be used instead of process substitution. And if it's acceptable to do it with waiting, try Here Documents.
 
 ### Rationale: