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FaJa documentation

Language syntax

FaJa id fully object oriented and dynamically typed programming language.

Class & Object

Every class start with keyword class and ends with endClass. Object is singleton class => there is only one instance. Class or Object can extend another class using extends keyword. Class can contains fields and methods. Fields definition starts with fields keyword. Fields can be separated by comma or new line. Fields section ends with endFields keyword. Methods starts with methods and ends with endMethods keyword. One line comments starts with :-)

Methods

Each method starts with def keyword and ends with end keyword. After def follow method name and in branches there are arguments separated by comma. Local variables are defined using keyword var. This class fields or methods can be access using keyword self:. Method call is performed by comma. You can also assign come method result or literal or another variable to some variable using <- operator.

Closures

Closure body start with { and ends with }. After start bracket can be comma separated arguments list. Arguments block ends with |. Closure body can be same as method body.

Literals

String literal is everything between " and ".
Number literal is only number.
Null literal is null.
Bool literals are true and false.
Array literal is [].

Embeded object reference

Method	Return value	Description
Object
==(Object a)	Bool	Return true if this reference is equal to _a_ reference.
toS()	String	Return String representation of object.
isNull()	Bool	Return true.
String extends Object
==(Object a)	Bool	Return true if all characters of _this_ and _a_ are equal.
length()	Number	Length of String.
+(Object a)	String	Concatenate String with String representation of object _a_.
ifTrue(Closure a)	String	Call closure _a_ if string is not empty. Return String.
ifFalse(Closure a)	String	Call closure _a_ if string is empty. Return String.
toS()	String	Return self.
toNumber()	Number	Try parse String to Number. If string is not number, throw exception.
split(String a)	Array	Split String into Array of Strings using _a_ as delimiter.
SystemIO extends Object
writeToFile(String a, Object b)	String	Append string representation of _b_ to file with path _a_
readFromFile(String a)	Array	Return array of Strings. Each String represents line of file with name _a_
out(Object a)	String	Print String _a_ to stdOut and return them.
inString()	String	Read String from stdIn and return them.
inNumber()	Number	Read Number from stdIn and return them.
inBool()	Bool	Read Bool from stdIn and return them.
Number extends Object
==(Number a)	Bool	Return true if this is equal to _a_.
+(Number a)	Number	Return this + _a_.
-(Number a)	Number	Return this + _a_.
*(Number a)	Number	Return this * _a_.
/(Number a)	Number	Return this / _a_.
%(Number a)	Number	Return this % _a_.
ifTrue(Closure a)	Number	Call closure _a_ if number is not 0\. Return Number.
ifFalse(Closure a)	Number	Call closure _a_ if number is 0\. Return Number.
toS()	String	Return String representation of Number.
times(Closure a)	Number	Call closure _a_ number times. Return Number.
<(Number a)	Bool	Return true if this is less then _a_.
>(Number a)	Bool	Return true if this is greater then _a_.
<=(Number a)	Bool	Return true if this is less or equal then _a_.
>=(Number a)	Bool	Return true if this is greater or equal then _a_.
abs()	Number	Return absolute value of number.
Null extends Object
isNull()	Bool	Return true.
ifTrue(Closure a)	Null	Never call Closure _a_. Return Null.
ifFalse(Closure a)	Null	Call Closure _a_. Return Null.
==(Object a)	Bool	Return true if _a_ is Null.
toS()	String	Return string representation of Null.
Closure extends Object
call()	Closure	Call closure code.
Bool extends Object
==(Bool a)	Bool	Return true if this object is equal to _a_.
ifTrue(Closure a)	Bool	Call Closure _a_ if this is true. Return Bool.
ifFalse(Closure a)	Bool	Call Closure _a_ if this is false. Return Bool.
and(Bool a)	Bool	Return true if this and _a_ are true.
or(Bool a)	Bool	Return true if this or _a_ are true.
not()	Bool	Return negation of Bool.
toS()	String	Return string representation of Bool.
Array extends Object
toS()	String	Return string representation of Array.
ifTrue(Closure a)	Array	Call Closure _a_ if array is not empty. Return Array.
ifFalse(Closure a)	Array	Call Closure _a_ if array is empty. Return Array.
each(Closure a)	Array	Call Closure _a_ for each item in array and return array.
collect(Closure a)	Array	Call Closure _a_ for each item in array and return new array with item returned from closure _a_
add(Object a)	Array	Add Object _a_ to next empty position.
add(Number a, Object b)	Array	Add Object _b_ to position _a_.
get(Number a)	Object	Get Object from position _a_.
push(Object a)	Array	Add Object _a_ to next empty position.
pop()	Object	Return and remove Object from last position.
top()	Object	Return Object from last position.
size()	Number	Return size of not null items in array.
contains(Object a)	Bool	Return true if array contains Object _a_.
select(Closure a)	Array	Return array with items for which Closure _a_ returns true.
Thread extends Object
run(Closure a)	Thread	Run closure _a_ in new thread.
wait()	Thread	Waits for this thread to die.