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--- labs:bash [2008/09/20 00:26] – admin
+++ labs:bash [2008/09/20 00:29] (current) – admin
@@ Line 1: / Line 1: @@
+====== Bash Scripting ======
+===== Resources =====
+  * [[http://tldp.org/LDP/abs/html/|Advanced Bash Scripting Guide]]
+===== Useful Tricks =====
+==== Existence of a Directory ====
+  if [ -z "`ls the/directory`" ]; then echo empty; fi
+==== Getting the First Word in a String ====
+Examples, using ''wc''
+  wc_count=`wc -l SOMETHING | cut -d' ' -f1`
+or
+  wc_count=`wc -l SOMETHING | awk '{ print $1 }'`
+or
+  wc_count=`wc -l SOMETHING | (read X Y; echo $X)`
+or
+  wc_count=`wc -l SOMETHING | sed -e 's/ .*//'`
+or
+  wc_count=`wc -l SOMETHING`
+  wc_count=${wc_count% SOMETHING}
+or
+  function first { echo $1 }
+  wc_count=$(first $(wc -l SOMETHING))