all tasks

Task/Tokenize-a-string/UNIX-Shell/tokenize-a-string-1.sh

@@ -0,0 +1,5 @@
+string='Hello,How,Are,You,Today'
+
+(IFS=,
+ printf '%s.' $string
+ echo)

Task/Tokenize-a-string/UNIX-Shell/tokenize-a-string-2.sh

@@ -0,0 +1,58 @@
+#! /bin/bash
+stripchar-l ()
+#removes the specified character from the left side of the string
+#USAGE: stripchar "stuff" "s" --> tuff
+{
+    string="$1";
+    string=${string#"$2"};
+
+  echo "$string"
+}
+
+join ()
+#join a string of characters on a specified delimiter
+#USAGE: join "1;2;3;4" ";" "," --> 1,2,3,4
+{
+    local result="";
+    local list="$1";
+    OLDIFS="$IFS";
+    local IFS=${2-" "};
+    local output_field_seperator=${3-" "};
+
+    for element in $list;
+    do
+        result="$result$output_field_seperator$element";
+    done;
+
+    result="`stripchar-l "$result" "$output_field_seperator"`";
+    echo "$result";
+    IFS="$OLDIFS"
+}
+
+split ()
+{
+#split a string of characters on a specified delimiter
+#USAGE: split "1;2;3;4" ";" --> 1 2 3 4	
+    local list="$1";
+    local input_field_seperator=${2-" "};
+    local output_field_seperator=" ";
+
+  #defined in terms of join
+  join "$list" "$input_field_seperator" "$output_field_seperator"
+}
+
+strtokenize ()
+{
+#splits up a string of characters into tokens,
+#based on a user supplied delimiter
+#USAGE:strtokenize "1;2;3;4" ";" ":" --> 1:2:3:4
+    local list="$1";
+	local input_delimiter=${2-" "};
+	local output_delimiter=${3-" "};
+	local contains_a_space=" "; #added to highlight the use
+                                    #of " " as an argument to join	
+
+  #splits it input then joins it with a user supplied delimiter
+  join "$( split "$list" "$input_delimiter" )" \
+    "$contains_a_space" "$output_delimiter";
+}

Task/Tokenize-a-string/UNIX-Shell/tokenize-a-string-3.sh

@@ -0,0 +1,2 @@
+ strtokenize "Hello,How,Are,You,Today" "," "."
+            Hello.How.Are.You.Today