Added conditionals

2018-06-23 10:34:10 +10:00
parent 809c8b5a03
commit c4a203bb40
2 changed files with 70 additions and 5 deletions
--- a/manuscript/chapter17.txt
+++ b/manuscript/chapter17.txt
@@ -7,10 +7,8 @@
 ```sh
 hex_to_rgb() {
    # Usage: hex_to_rgb "#FFFFFF"
-    ((r=16#${1:1:2}))
-    ((g=16#${1:3:2}))
-    ((b=16#${1:5:6}))
-
+    : "${1/\#}"
+    ((r=16#${_:0:2},g=16#${_:2:2},b=16#${_:4:2}))
    printf '%s\n' "$r $g $b"
 }
 ```