Update loops.sh

loops.sh

@@ -1,6 +1,17 @@
 # Just stock loops
 ##############################################################
-https://stackoverflow.com/questions/8880603/loop-through-an-array-of-strings-in-bash
+
+# Create sample list to be iterated
+# <manual>
+
+# Delete empty lines just in case
+sed -i '/^$/d' samplelist.txt
+
+# Read into array
+readarray -t samplelist < samplelist.txt 
+
+##############################################################
+# Reference: https://stackoverflow.com/questions/8880603/loop-through-an-array-of-strings-in-bash
 
 # Basic
 ## declare an array variable
@@ -33,3 +44,32 @@ do
   echo "index: $i, value: ${array[$i]}"
 done
 ##############################################################
+
+# Use
+# Loop with counter
+#!/bin/bash
+
+## declare an array variable
+readarray -t samplelist < samplelist.txt 
+
+# get length of an array
+arraylength=${#samplelist[@]}
+
+# use for loop to read all values and indexes
+
+for (( i=0; i<${#samplelist[@]}; i++ ));
+do
+  echo "index: $i, value: ${samplelist[$i]}"
+done
+
+# Note:
+# Length of array:                   ${#samplelist[@]} 
+# Lenght of string of the element 1: ${#samplelist[1]}
+# Value of the element 1:            ${samplelist[1]}
+#
+##############################################################
+
+
+
+
+