1 files changed, 53 insertions, 0 deletions
diff --git a/rushs/tinyprintf/alphanum/alphanum.sh b/rushs/tinyprintf/alphanum/alphanum.sh
new file mode 100755
index 0000000..e4c5aee
--- /dev/null
+++ b/rushs/tinyprintf/alphanum/alphanum.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+letters()
+{
+    grepped=$(echo "$1" | grep -E "^[a-zA-Z]+$")
+    [ "$1" = "$grepped" ] && return 0 || return 1
+}
+
+empty()
+{
+    if echo "$1" | grep -qE '^[[:space:]]+$'; then
+        return 0
+    fi
+    return 1
+}
+
+digit()
+{
+    grepped=$(echo "$1" | grep -E "^[0-9]$")
+    [ "$1" = "$grepped" ] && return 0 || return 1
+}
+
+number()
+{
+    grepped=$(echo "$1" | grep -E "^[1-9][0-9]+$")
+    [ "$1" = "$grepped" ] && return 0 || return 1
+}
+
+alph()
+{
+    grepped=$(echo "$1" | grep -E "^[a-zA-Z0-9]+$")
+    [ "$1" = "$grepped" ] && return 0 || return 1
+}
+
+while IFS='' read -r str; do
+    if [ -z "$str" ]; then
+        echo it is empty
+        continue
+    elif letters "$str"; then
+        echo "it is a word"
+    elif number "$str"; then
+        echo "it is a number"
+    elif digit "$str"; then
+        echo "it is a digit"
+    elif empty "$str"; then
+        echo "it is empty"
+    elif alph "$str"; then
+        echo "it is an alphanum"
+    else
+        echo "it is too complicated"
+        exit
+    fi
+done