Initial data commit

Task/Walk-a-directory-Recursively/UNIX-Shell/walk-a-directory-recursively-1.sh

@@ -0,0 +1 @@
+find . -name '*.txt' -type f

Task/Walk-a-directory-Recursively/UNIX-Shell/walk-a-directory-recursively-2.sh

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+#! /bin/bash
+# Warning: globstar excludes hidden directories.
+# Turn on recursive globbing (in this script) or exit if the option is not supported:
+shopt -s globstar || exit
+
+for f in **
+do
+  if [[ "$f" =~ \.txt$ ]] ; then
+    echo "$f"
+  fi
+done

Task/Walk-a-directory-Recursively/UNIX-Shell/walk-a-directory-recursively-3.sh

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+#! /bin/bash
+
+indent_print()
+{
+    for((i=0; i < $1; i++)); do
+	echo -ne "\t"
+    done
+    echo "$2"
+}
+
+walk_tree()
+{
+    local oldifs bn lev pr pmat
+    if [[ $# -lt 3 ]]; then
+	if [[ $# -lt 2 ]]; then
+	    pmat=".*"
+	else
+	    pmat="$2"
+	fi
+	walk_tree "$1" "$pmat" 0
+	return
+    fi
+    lev=$3
+    [ -d "$1" ] || return
+    oldifs=$IFS
+    IFS="
+"
+    for el in $1/*; do
+	bn=$(basename "$el")
+	if [[ -d "$el" ]]; then
+	    indent_print $lev "$bn/"
+	    pr=$( walk_tree "$el" "$2" $(( lev + 1)) )
+	    echo "$pr"
+	else
+	    if [[ "$bn" =~ $2 ]]; then
+		indent_print $lev "$bn"
+	    fi
+	fi
+    done
+    IFS=$oldifs
+}
+
+walk_tree "$1" "\.sh$"

Task/Walk-a-directory-Recursively/UNIX-Shell/walk-a-directory-recursively-4.sh

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+#! /usr/bin/env bash
+
+walk_tree() {
+	ls "$1" | while IFS= read i; do
+		if [ -d "$1/$i" ]; then
+			echo "$i/"
+			walk_tree "$1/$i" "$2" | sed -r 's/^/\t/'
+		else
+			echo "$i" | grep -E "$2"
+		fi
+	done
+}
+
+walk_tree "$1" "\.sh$"