diff --git a/compiler/main.v b/compiler/main.v
index 2d104c31ac..f7b2e9e203 100644
--- a/compiler/main.v
+++ b/compiler/main.v
@@ -236,6 +236,7 @@ typedef map map_string;
 //============================== HELPER C MACROS =============================*/ 
 
 #define _PUSH(arr, val, tmp, tmp_typ) {tmp_typ tmp = (val); array__push(arr, &tmp);}
+#define _PUSH_MANY(arr, val, tmp, tmp_typ) {tmp_typ tmp = (val); array__push_many(arr, tmp.data, tmp.len);}
 #define _IN(typ, val, arr) array_##typ##_contains(arr, val) 
 #define ALLOC_INIT(type, ...) (type *)memdup((type[]){ __VA_ARGS__ }, sizeof(type)) 
 #define UTF8_CHAR_LEN( byte ) (( 0xE5000000 >> (( byte >> 3 ) & 0x1e )) & 3 ) + 1 
diff --git a/compiler/parser.v b/compiler/parser.v
index 748da98218..fed5f5f34b 100644
--- a/compiler/parser.v
+++ b/compiler/parser.v
@@ -48,21 +48,9 @@ mut:
 	assigned_type  string
 	left_type  string
 	tmp_cnt        int
-	// TODO all these options are copy-pasted from the V struct. Create a Settings struct instead?
-	// is_test        bool
 	is_script      bool
 	pref           *Preferences // Setting and Preferences shared from V struct
-	// is_live        bool
-	// is_so          bool
-	// is_prof        bool
-	// translated     bool
-	// is_prod        bool
-	// is_verbose     bool
-	// obfuscate      bool
-	// is_play        bool
-	// is_repl        bool
 	builtin_pkg    bool
-	// build_mode     BuildMode
 	vh_lines       []string
 	inside_if_expr bool
 	is_struct_init bool
@@ -92,19 +80,9 @@ fn (c mut V) new_parser(path string, run Pass) Parser {
 		table: c.table
 		cur_fn: EmptyFn
 		cgen: c.cgen
-		// is_test: c.pref.is_test
 		is_script: (c.pref.is_script && path == c.dir)
 		pref: c.pref
-		// is_so: c.is_so
 		os: c.os
-		// is_prof: c.is_prof
-		// is_prod: c.is_prod
-		// is_play: c.is_play
-		// translated: c.translated
-		// obfuscate: c.obfuscate
-		// is_verbose: c.is_verbose
-		// build_mode: c.build_mode
-		// is_repl: c.is_repl
 		run: run
 		vroot: c.vroot
 	}
@@ -148,7 +126,7 @@ fn (p mut Parser) parse() {
 	p.fgenln('\n')
 	p.builtin_pkg = p.pkg == 'builtin'
 	p.can_chash = p.pkg == 'gg' || p.pkg == 'glm' || p.pkg == 'gl' || 
-		p.pkg == 'http' ||  p.pkg == 'glfw' // TODO tmp remove
+		p.pkg == 'http' ||  p.pkg == 'glfw' || p.pkg=='ui' // TODO tmp remove
 	// Import pass - the first and the smallest pass that only analyzes imports
 	p.table.register_package(p.pkg)
 	if p.run == RUN_IMPORTS {
@@ -1151,8 +1129,7 @@ fn (p mut Parser) var_decl() {
 		p.statements()
 		p.genln('$typ $name = *($typ*) $tmp . data;')
 		if !p.returns && p.prev_tok2 != CONTINUE && p.prev_tok2 != BREAK {
-			println(p.prev_tok2)
-			p.error('`or` statement must return/continue/break')
+			p.error('`or` block must return/continue/break/panic')
 		}
 	}
 	p.register_var(Var {
@@ -1820,13 +1797,21 @@ fn (p mut Parser) expression() string {
 			if !p.expr_var.is_mut && !p.pref.translated {
 				p.error('`$p.expr_var.name` is immutable (can\'t <<)')
 			}
-			p.check_types(p.expression(), tmp_typ)
-			// Pass tmp var info to the _PUSH macro
-			p.gen('), $tmp, $tmp_typ)')
-			// Prepend tmp initialisation and push call
-			// Don't dereference if it's already a mutable array argument  (`fn foo(mut []int)`)
-			push_call := if typ.contains('*'){'_PUSH('} else { '_PUSH(&'} // p.cgen.set_placeholder(ph, '_PUSH(&')
-			p.cgen.set_placeholder(ph, push_call)
+			expr_type := p.expression() 
+			// Two arrays of the same type? 
+			push_array :=  typ == expr_type
+			if push_array { 
+				p.cgen.set_placeholder(ph, '_PUSH_MANY(&' ) 
+				p.gen('), $tmp, $typ)')
+			}  else { 
+				p.check_types(expr_type, tmp_typ)
+				// Pass tmp var info to the _PUSH macro
+				// Prepend tmp initialisation and push call
+				// Don't dereference if it's already a mutable array argument  (`fn foo(mut []int)`)
+				push_call := if typ.contains('*'){'_PUSH('} else { '_PUSH(&'} 
+				p.cgen.set_placeholder(ph, push_call)
+				p.gen('), $tmp, $tmp_typ)')
+			} 
 			return 'void'
 		}
 		else {
diff --git a/compiler/table.v b/compiler/table.v
index 9a5d727b4c..1de6cbcfb5 100644
--- a/compiler/table.v
+++ b/compiler/table.v
@@ -437,6 +437,9 @@ fn (p mut Parser) _check_types(got, expected string, throw bool) bool {
 	if got=='byteptr' && expected=='byte*' {
 		return true
 	}
+	if got=='byte*' && expected=='byteptr' {
+		return true
+	} 
 	if got=='int' && expected=='byte*' {
 		return true
 	}
diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 0848addcf4..cec68385e6 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -69,13 +69,6 @@ fn array_repeat(val voidptr, nr_repeats, elm_size int) array {
 	return arr
 }
 
-pub fn (a mut array) append_array(b array) {
-	for i := 0; i < b.len; i++ {
-		val := b[i]
-		a._push(val)
-	}
-}
-
 pub fn (a mut array) sort_with_compare(compare voidptr) {
 	C.qsort(a.data, a.len, a.element_size, compare)
 }
@@ -178,6 +171,7 @@ fn (arr mut array) _push(val voidptr) {
 	arr.len++
 }
 
+// `val` is array.data 
 pub fn (arr mut array) _push_many(val voidptr, size int) {
 	if arr.len >= arr.cap - size {
 		cap := (arr.len + size) * 2
diff --git a/vlib/builtin/array_test.v b/vlib/builtin/array_test.v
index 31b29c43cd..84eaca3824 100644
--- a/vlib/builtin/array_test.v
+++ b/vlib/builtin/array_test.v
@@ -141,7 +141,7 @@ fn test_slice() {
 fn test_push_many() {
 	mut a := [1, 2, 3]
 	b := [4, 5, 6]
-	a._push_many(b.data, b.len)
+	a << b 
 	assert a.len == 6
 	assert a[0] == 1
 	assert a[3] == 4
diff --git a/vlib/gg/gg.v b/vlib/gg/gg.v
index ea02de9545..9d1802db35 100644
--- a/vlib/gg/gg.v
+++ b/vlib/gg/gg.v
@@ -567,7 +567,7 @@ fn (ctx &GG) _draw_text(_x, _y int, utext ustring, cfg gx.TextCfg) {
 	// #free(runes.data);
 }
 
-fn (ctx &GG) draw_text_def(x, y int, text string) {
+pub fn (ctx &GG) draw_text_def(x, y int, text string) {
 	cfg := gx.TextCfg {
 		color: gx.Black,
 		size: DEFAULT_FONT_SIZE,
diff --git a/vlib/os/os.v b/vlib/os/os.v
index de6fcad0c6..33af8e9a64 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -108,12 +108,7 @@ fn parse_windows_cmd_line(cmd byteptr) []string {
 //pub fn read_file(path string) ?string {
 pub fn read_file(path string) ?string { 
 	mut res := ''
-	mut mode := 'r' 
-	777  // TODO 
-	// Need 'rb' on windows to avoid the \r\n mess. 
-	$if windows {
-		mode = 'rb' 
-	} 
+	mut mode := 'rb' 
 	cpath := path.cstr()
 	fp := C.fopen(cpath, mode.cstr()) 
 	if isnil(fp) {
@@ -132,31 +127,6 @@ pub fn read_file(path string) ?string {
 	return res
 }
 
-pub fn read_file_opt(path string) ?string { 
-	mut res := ''
-	mut mode := 'r' 
-	777  // TODO 
-	// Need 'rb' on windows to avoid the \r\n mess. 
-	$if windows {
-		mode = 'rb' 
-	} 
-	cpath := path.cstr()
-	fp := C.fopen(cpath, mode.cstr()) 
-	if isnil(fp) {
-		return error('failed to open file "$path"')
-	}
-	C.fseek(fp, 0, SEEK_END)
-	fsize := C.ftell(fp)
-	// C.fseek(fp, 0, SEEK_SET)  // same as C.rewind(fp) below
-	C.rewind(fp)
-	mut str := malloc(fsize + 1)
-	C.fread(str, fsize, 1, fp)
-	C.fclose(fp)
-	str[fsize] = 0
-	res = tos(str, fsize)
-	return res
-}
-
 // file_size returns the size of the file located in `path`.
 pub fn file_size(path string) int {
 	s := C.stat{}
@@ -208,7 +178,7 @@ fn read_ulines(path string) []ustring {
 pub fn open(path string) ?File {
 	cpath := path.cstr() 
 	file := File {
-		cfile: C.fopen(cpath, 'r') 
+		cfile: C.fopen(cpath, 'rb') 
 	}
 	if isnil(file.cfile) {
 		return error('failed to open file "$path"')
@@ -220,7 +190,7 @@ pub fn open(path string) ?File {
 pub fn create(path string) ?File {
 	cpath := path.cstr() 
 	file := File {
-		cfile: C.fopen(cpath, 'w') 
+		cfile: C.fopen(cpath, 'wb') 
 	}
 	if isnil(file.cfile) {
 		return error('failed to create file "$path"')
@@ -231,7 +201,7 @@ pub fn create(path string) ?File {
 pub fn open_append(path string) ?File {
 	cpath := path.cstr() 
 	file := File {
-		cfile: C.fopen(cpath, 'a') 
+		cfile: C.fopen(cpath, 'ab') 
 	}
 	if isnil(file.cfile) {
 		return error('failed to create file "$path"')
diff --git a/vlib/pg/pg.v b/vlib/pg/pg.v
new file mode 100644
index 0000000000..3e7d27cf02
--- /dev/null
+++ b/vlib/pg/pg.v
@@ -0,0 +1,115 @@
+module pg
+
+import os
+import time
+
+#flag -lpq
+#flag linux -I/usr/include/postgresql
+#include <libpq-fe.h>
+
+struct DB {
+mut:
+	conn *C.PGconn
+}
+
+struct Row {
+pub:
+	vals []string
+}
+
+import const (
+	CONNECTION_OK
+) 
+
+struct C.PGResult { }
+
+fn C.PQconnectdb(a byteptr) *C.PGconn
+fn C.PQerrorMessage(voidptr) byteptr 
+
+pub fn connect(dbname, user string) DB {
+	conninfo := 'host=localhost user=$user dbname=$dbname'
+	conn:=C.PQconnectdb(conninfo.cstr())
+	status := C.PQstatus(conn)
+	if status != CONNECTION_OK { 
+		error_msg := C.PQerrorMessage(conn) 
+		eprintln('Connection to a PG database failed: ' + string(error_msg)) 
+		exit(1) 
+	}
+	return DB {conn: conn} 
+}
+
+fn res_to_rows(res voidptr) []pg.Row {
+	nr_rows := C.PQntuples(res) 
+	nr_cols := C.PQnfields(res) 
+	mut rows := []pg.Row
+	for i := 0; i < nr_rows; i++ {
+		mut row := Row{}
+		for j := 0; j < nr_cols; j++ {
+			val := C.PQgetvalue(res, i, j) 
+			row.vals << string(val)  
+		}
+		rows << row
+	}
+	return rows
+}
+
+pub fn (db DB) q_int(query string) int {
+	rows := db.exec(query)
+	if rows.len == 0 {
+		println('q_int "$query" not found')
+		return 0
+	}
+	row := rows[0]
+	if row.vals.len == 0 {
+		return 0
+	}
+	val := row.vals[0]
+	return val.int() 
+}
+
+pub fn (db DB) q_string(query string) string {
+	rows := db.exec(query)
+	if rows.len == 0 {
+		println('q_string "$query" not found')
+		return ''
+	}
+	row := rows[0]
+	if row.vals.len == 0 {
+		return ''
+	}
+	val := row.vals[0]
+	return val
+}
+
+pub fn (db DB) q_strings(query string) []pg.Row {
+	return db.exec(query)
+}
+
+pub fn (db DB) exec(query string) []pg.Row {
+	res := C.PQexec(db.conn, query.cstr())
+	e := string(C.PQerrorMessage(db.conn))
+	if e != '' {
+		println('pg exec error:')
+		println(e)
+		return res_to_rows(res)
+	}
+	return res_to_rows(res)
+}
+
+
+// 
+pub fn (db DB) exec_param2(query string, param, param2 string) []pg.Row {
+	mut param_vals := [2]byteptr 
+	param_vals[0] = param.str 
+	param_vals[1] = param2.str 
+	res := C.PQexecParams(db.conn, query.str, 2, 0, param_vals, 0, 0, 0)  
+	return res_to_rows(res)
+}
+
+pub fn (db DB) exec_param(query string, param string) []pg.Row {
+	mut param_vals := [1]byteptr 
+	param_vals[0] = param.str 
+	res := C.PQexecParams(db.conn, query.str, 1, 0, param_vals, 0, 0, 0)  
+	return res_to_rows(res)
+}
+
diff --git a/vlib/pg/pg_lin.v b/vlib/pg/pg_lin.v
new file mode 100644
index 0000000000..965aac0d24
--- /dev/null
+++ b/vlib/pg/pg_lin.v
@@ -0,0 +1,4 @@
+module pg
+
+#flag -I/usr/include/postgresql
+// #flag `pkg-config --cflags libpq`
diff --git a/vlib/pg/pg_mac.v b/vlib/pg/pg_mac.v
new file mode 100644
index 0000000000..65c15291c5
--- /dev/null
+++ b/vlib/pg/pg_mac.v
@@ -0,0 +1,2 @@
+module pg
+
diff --git a/vlib/strings/builder.v b/vlib/strings/builder.v
index 4cc0e8a7e7..11f34c6127 100644
--- a/vlib/strings/builder.v
+++ b/vlib/strings/builder.v
@@ -18,11 +18,13 @@ pub fn new_builder(initial_size int) Builder {
 
 pub fn (b mut Builder) write(s string) {
 	b.buf._push_many(s.str, s.len)
+	//b.buf << []byte(s)  // TODO 
 	b.len += s.len
 }
 
 pub fn (b mut Builder) writeln(s string) {
 	b.buf._push_many(s.str, s.len)
+	//b.buf << []byte(s)  // TODO 
 	b.buf << `\n`
 	b.len += s.len + 1
 }