Change code style

insert.go

@@ -194,11 +194,11 @@ func (b InsertBuilder) Suffix(sql string, args ...interface{}) InsertBuilder {
 // SetMap set columns and values for insert builder from a map of column name and value
 // note that it will reset all previous columns and values was set if any
 func (b InsertBuilder) SetMap(clauses map[string]interface{}) InsertBuilder {
-	cols := make([]string, len(clauses))
-	vals := make([]interface{}, len(clauses))
-	idx := 0
-	for cols[idx], vals[idx] = range clauses {
-		idx++
+	cols := make([]string, 0, len(clauses))
+	vals := make([]interface{}, 0, len(clauses))
+	for col, val := range clauses {
+		cols = append(cols, col)
+		vals = append(vals, val)
 	}
 
 	b = builder.Set(b, "Columns", cols).(InsertBuilder)