Move under www to ease rsync

www/eps/hpr2729/hpr2729_bash18_ex1.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+#-------------------------------------------------------------------------------
+# Example 1 for Bash Tips show 18: transforming words in a string
+#
+# This is a contrived and overly complex example to show that replacing
+# selected words in a phrase by different words is a non-trivial exercise!
+#-------------------------------------------------------------------------------
+
+#
+# Enable extglob
+#
+shopt -s extglob
+
+#
+# What we'll work on and where we'll store the transformed version
+#
+phrase='Now is the time for all good men to come to the aid of the party'
+newphrase=
+
+#
+# How to transform words in the phrase and a place to store the keys
+#
+declare -A transform=([good]='bad' [men]='people' [party]='Community')
+declare -a keys
+
+#
+# Build an extglob pattern from the keys of the associative array
+#
+keys=( ${!transform[@]} )
+targets="${keys[*]/%/|}"     # Each key is followed by a '|'
+targets="${targets%|}"       # Strip the last '|'
+targets="${targets// }"      # Some spaces got in there too
+pattern="@(${targets})"      # Make the pattern at last
+
+#
+# Go word by word; if a word matches the pattern replace it by what's in the
+# 'transform' array. Because the pattern has been built from the array keys
+# we'll never have the case where a word doesn't have a transformation.
+#
+for word in $phrase; do
+    if [[ $word == $pattern ]]; then
+        word=${transform[$word]}
+    fi
+    newphrase+="$word "
+done
+echo "$newphrase"
+
+exit