<s>
F-Script	B-Language
is	O
an	O
object-oriented	B-Language
scripting	B-Language
programming	I-Language
language	I-Language
for	O
Apple	O
's	O
macOS	B-Application
operating	O
system	O
developed	O
by	O
Philippe	O
Mougin	O
.	O
</s>
<s>
F-Script	B-Language
is	O
an	O
interactive	B-General_Concept
language	O
based	O
on	O
Smalltalk	B-Application
,	O
using	O
macOS	B-Application
's	O
native	O
Cocoa	B-Operating_System
API	I-Operating_System
.	O
</s>
<s>
F-Script	B-Language
is	O
based	O
on	O
a	O
pure	O
object	O
paradigm	O
:	O
every	O
entity	O
manipulated	O
within	O
the	O
language	O
is	O
an	O
object	O
.	O
</s>
<s>
Its	O
base	O
syntax	O
and	O
concepts	O
are	O
identical	O
to	O
those	O
of	O
the	O
language	O
Smalltalk	B-Application
(	O
the	O
canonical	O
example	O
of	O
an	O
object-oriented	B-Language
language	I-Language
)	O
with	O
specific	O
extensions	O
to	O
support	O
array	B-Application
programming	I-Application
as	O
in	O
the	O
language	O
APL	B-Language
.	O
</s>
<s>
F-Script	B-Language
provides	O
an	O
interpreted	B-Application
,	O
interactive	B-General_Concept
environment	O
with	O
support	O
for	O
workspaces	O
,	O
which	O
provide	O
a	O
rich	O
set	O
of	O
functions	O
including	O
object	B-Application
persistence	I-Application
,	O
distributed	B-Operating_System
objects	I-Operating_System
,	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
framework	O
,	O
database	O
access	O
,	O
among	O
other	O
things	O
.	O
</s>
<s>
Like	O
Smalltalk	B-Application
,	O
F-Script	B-Language
'	O
s	O
syntax	O
is	O
very	O
simple	O
,	O
without	O
requiring	O
specific	O
notation	O
for	O
control	O
structures	O
which	O
are	O
provided	O
in	O
a	O
unified	O
manner	O
by	O
the	O
message	O
send	O
operation	O
.	O
</s>
<s>
Unlike	O
Smalltalk	B-Application
,	O
F-Script	B-Language
provides	O
specific	O
notational	O
extensions	O
to	O
support	O
the	O
Array	B-Application
class	O
,	O
using	O
curly	O
brackets	O
to	O
describe	O
literal	O
arrays	O
,	O
which	O
may	O
contain	O
any	O
F-Script	B-Language
expressions	O
.	O
</s>
<s>
For	O
example	O
,	O
{	O
1+3	O
,	O
'	O
name	O
 '	O
,	O
true}	O
is	O
a	O
valid	O
array	B-Application
literal	O
.	O
</s>
<s>
The	O
empty	O
array	B-Application
is	O
denoted	O
by	O
 {  } 	O
.	O
</s>
<s>
Arrays	O
of	O
arrays	O
are	O
supported	O
transparently	O
,	O
since	O
any	O
array	B-Application
is	O
just	O
another	O
object	O
.	O
</s>
<s>
Message	O
expressions	O
in	O
F-Script	B-Language
are	O
similar	O
to	O
those	O
in	O
Smalltalk	B-Application
:	O
they	O
specify	O
which	O
object	O
is	O
the	O
receiver	O
of	O
the	O
message	O
,	O
which	O
operation	O
is	O
called	O
by	O
the	O
message	O
,	O
and	O
any	O
argument	O
objects	O
needed	O
by	O
the	O
operation	O
.	O
</s>
<s>
F-Script	B-Language
supports	O
unary	O
,	O
binary	O
,	O
and	O
keyword	O
messages	O
.	O
</s>
<s>
Thus	O
,	O
if	O
A	O
=	O
{	O
1	O
,	O
2	O
,	O
3}	O
and	O
B	O
=	O
{	O
10	O
,	O
20	O
,	O
30}	O
,	O
then	O
F-Script	B-Language
allows	O
A	O
+	O
B	O
=	O
{	O
11	O
,	O
22	O
,	O
33}	O
.	O
</s>
<s>
F-Script	B-Language
is	O
chiefly	O
used	O
as	O
a	O
lightweight	O
scripting	B-Language
layer	O
on	O
top	O
of	O
macOS	B-Application
's	O
Cocoa	B-Operating_System
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
.	O
</s>
<s>
It	O
can	O
be	O
embedded	O
in	O
applications	O
using	O
the	O
F-Script	B-Language
framework	O
and	O
Interface	O
Builder	O
palettes	O
.	O
</s>
<s>
It	O
can	O
also	O
be	O
used	O
interactively	B-General_Concept
from	O
the	O
F-Script	B-Language
interpreter	B-Application
to	O
prototype	O
applications	O
.	O
</s>
<s>
Finally	O
,	O
it	O
can	O
be	O
used	O
to	O
explore	O
applications	O
 '	O
object	O
hierarchies	O
using	O
an	O
injector	O
such	O
as	O
F-Script	B-Language
Anywhere	O
.	O
</s>
<s>
The	O
original	O
F-script	B-Language
development	O
by	O
Philippe	O
Mougin	O
stopped	O
at	O
version	O
2.1	O
in	O
2011	O
.	O
</s>
<s>
Ilya	O
Kulakov	O
(	O
Kentzo	O
)	O
took	O
over	O
the	O
FScript.org	O
website	O
and	O
updated	O
the	O
program	O
to	O
work	O
with	O
Mac	B-Application
OS	I-Application
X	O
10.7	O
through	O
10.10	O
until	O
version	O
2.3	O
of	O
2014	O
,	O
building	O
off	O
Jonathan	O
Mitchell	O
's	O
modernization	O
work	O
.	O
</s>
<s>
Kulakov	O
noted	O
that	O
as	O
F-Script	B-Language
ties	O
deeply	O
into	O
the	O
system	O
,	O
the	O
code	O
must	O
be	O
changed	O
to	O
reflect	O
the	O
framework	O
available	O
in	O
each	O
Mac	B-Application
OS	I-Application
X	O
release	O
.	O
</s>
<s>
The	O
last	O
update	O
to	O
this	O
chain	O
of	O
work	O
was	O
done	O
in	O
2018	O
,	O
by	O
Wolfgang	O
Baird	O
,	O
who	O
updated	O
F-Script	B-Language
to	O
work	O
with	O
Mac	B-Application
OS	I-Application
X	O
10.12	O
.	O
</s>
