8_b_2: Add solution

2 files changed, 20 insertions, 1 deletions

diff --git a/README.md b/README.md
index 525f19a..90b1ca4 100644
--- a/README.md
+++ b/README.md
@@ -109,7 +109,7 @@ of a group is in bold italics.
 | **_8_a_1_**    | yes    | 205  | 8. Efficient file processing, regular expressions, and file name matching |
 | 8_a_2          | yes    |      | |
 | **_8_b_1_**    | yes, in 8_a_2 | 210  | |
-| 8_b_2          |        |      | |
+| 8_b_2          | yes    |      | |
 | 8_b_3          |        |      | |
 | **_8_b_1_**    |        | 211  | |
 | 8_b_2          |        |      | |
diff --git a/ch08/8_b_2.txt b/ch08/8_b_2.txt
new file mode 100644
index 0000000..6af6518
--- /dev/null
+++ b/ch08/8_b_2.txt
@@ -0,0 +1,19 @@
+-- If you're on a Unix-like system, look through the documentation for the
+-- System.Posix.Files module, and see if you can find a replacement for the
+-- doesNameExist function.
+
+-- The replacement is the fileExist function that checks for existence of both
+-- regular file and directories.
+
+ghci> :module + System.Posix.Files
+
+ghci> fileExist "nonexistent_file"
+False
+
+-- Regular file
+ghci> fileExist "8_b_2.txt"
+True
+
+-- Directory
+ghci> fileExist "../ch08/"
+True