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Task/Rep-string/UNIX-Shell/rep-string.sh

@@ -0,0 +1,35 @@
+is_repeated() {
+    local str=$1 len rep part
+    for (( len = ${#str} / 2; len > 0; len-- )); do
+        part=${str:0:len}
+        rep=""
+        while (( ${#rep} < ${#str} )); do
+            rep+=$part
+        done
+        if [[ ${rep:0:${#str}} == $str ]] && (( $len < ${#str} )); then
+            echo "$part"
+            return 0
+        fi
+    done
+    return 1
+}
+
+while read test; do
+    if part=$( is_repeated "$test" ); then
+        echo "$test is composed of $part repeated"
+    else
+        echo "$test is not a repeated string"
+    fi
+done <<END_TESTS
+1001110011
+1110111011
+0010010010
+1010101010
+1111111111
+0100101101
+0100100
+101
+11
+00
+1
+END_TESTS