add suffix()

Author: scivision

+stdlib/+fileio/suffix.m

@@ -0,0 +1,9 @@
+function s = suffix(path)
+% SUFFIX last suffix of filename
+arguments
+  path string
+end
+
+[~, ~, s] = fileparts(path);
+
+end

+stdlib/+test/TestFilePure.m

@@ -40,6 +40,19 @@ function test_parent(tc)
 
 end
 
+function test_suffix(tc)
+
+tc.verifyEmpty(stdlib.fileio.suffix(string.empty))
+tc.verifyEqual(stdlib.fileio.suffix(""), "")
+
+tc.verifyEqual(stdlib.fileio.suffix("/foo/bar/baz"), "")
+tc.verifyEqual(stdlib.fileio.suffix("/foo/bar/baz/"), "")
+
+tc.verifyEqual(stdlib.fileio.suffix("foo/bar/baz.txt"), ".txt")
+tc.verifyEqual(stdlib.fileio.suffix("foo/bar/baz.txt.gz"), ".gz")
+
+end
+
 
 function test_stem(tc)
 

+stdlib/suffix.m

@@ -0,0 +1,10 @@
+function s = suffix(p)
+%% suffix(p)
+
+arguments
+  p string
+end
+
+s = stdlib.fileio.suffix(p);
+
+end