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| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | ch08/8_b_2.txt | 19 |
2 files changed, 20 insertions, 1 deletions
@@ -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 |