xio: tabs docs

1 files changed, 4 insertions, 3 deletions

diff --git a/skate/xio/util.go b/skate/xio/util.go
index ead1a5d..de3afb4 100644
--- a/skate/xio/util.go
+++ b/skate/xio/util.go
@@ -19,6 +19,7 @@ func OpenTwo(f1, f2 string) (g1, g2 *os.File, err error) {
 	return g1, g2, nil
 }
 
+// TabsToMapFile turns columns from a file into a map.
 func TabsToMapFile(filename, sep string, kCol, vCol int) (map[string]string, error) {
 	f, err := os.Open(filename)
 	if err != nil {
@@ -28,12 +29,12 @@ func TabsToMapFile(filename, sep string, kCol, vCol int) (map[string]string, err
 	return TabsToMap(f, sep, kCol, vCol)
 }
 
-// TabsToMap read from a reader and turns values from kCol, vCol columns into a
-// mapping.
+// TabsToMap read from a reader and turns values from kCol, vCol columns
+// (1-indexed) into a map.
 func TabsToMap(r io.Reader, sep string, kCol, vCol int) (map[string]string, error) {
 	var (
 		br         = bufio.NewReader(r)
-		m          = make(map[string]string, 8388608)
+		m          = make(map[string]string)
 		line, k, v string
 		fields     []string
 		err        error