mlisp/doc/Doc.md

Syntax and Special Forms

Special Form	Argument Evaluations	Purpose
(if cond a b)	if only evaluates its cond argument. If cond is truthy (non-zero), then a is evaluated. Otherwise, b is evaluated.	This special form is the main method of control flow.
(do a b c ...)	do takes a list of s-expressions and evaluates them in the order they were given (in the current scope), and then returns the result of the last s-expression.	This special form allows lambda functions to have multi-step bodies.
(scope a b c ...)	scope takes a list of s-expressions and evaluates them in the order they were given in a new scope, and then returns the result of the last s-expression.	This special form allows the user to evaluate blocks of code in new scopes.
(defun name params body)	defun evaluates none of its arguments.	This special form allows the user to conveniently define functions.
(define name value)	define evaluates the value argument, which is then assigned to name in the current scope.	This special form allows the user to bind atoms to values in a scope.
(lambda params body)	lambda evaluates none of its arguments.	This special form allows the user to define anonymous functions.
(quote x)	quote evaluates none of its arguments.	This is equivalent to the 'expr syntactic sugar.
(for x list ...)	for evaluates only its list argument.	for iterates through the list storing each element in x, and then evaluating all of the rest of the values in the for body. It then returns the last value evaluated.
(while cond ...)	while evaluates only its cond argument.	while evaluates its condition expression every iteration before running. If it is true, it continues to evaluate every expression in the while body. It then returns the last value evaluated.

Library

Signature	Description	Return values
(= a b)	Test whether two values are equal	1 when equal otherwise 0
(!= a b)	Test whether two values are not equal	1 when not equal otherwise 0
(> a b)	Test whether one value is greater to another	1 when greater otherwise 0
(< a b)	Test whether one value is less to another	1 when less otherwise 0
(>= a b)	Test whether one value is greater or equal to another	1 when greater or equal otherwise 0
(<= a b)	Test whether one value is less or equal to another	1 when less or equal otherwise 0
(+ a b ..)	Sum multiple values	sum of values
(- a b)	Substract two values	result of substraction
(* a b ..)	Multiply several values	result of multiplication
(/ a b)	Divide two values	result of division
(% a b)	Remainder of division	result of operation
(list ..)	Create a list of values
(insert list index element)	Insert an element into a lis.Indexed from 0	new list with value inserted
(index list index)	Return element at index in list	Element at index
(remove list index)	Remove a value at an index from a list	List with element removed
(len list)	Get the length of a list	list length
(push list element)	Add an item to the end of a list	new list with element added
(pop list)	Returns last element of list	Last element
(head list)	Returns first element of a list	First element
(tail list)	Return all elements of list except first one	List without first element
(first list)	Returns first element of a list	First element
(last list)	Returns last element of list	Last element
(range low high)	Returns list with elements in range low .. high	(range 1 5) => (1 2 3 4)
(member list item)
(make-list len)	Return list with len nil elements	(make-list 3) => (nil nil nil)
(make-list-of len value)
(map ..)		(map (lambda (x) (+ x 10)) '(1 2 3 4 5 6)) => (11 12 13 14 15 16)
(filter lambda list)		(filter (lambda (x) (> x 2)) '(1 2 3 4 5)) => (3 4 5)
(reduce lambda acumulator list)		>>> (reduce (lambda (x y) (+ (* x 10) y)) 0 '(1 2 3 4)) => 1234
(exit ..)
(quit ..)
(print ..)
(input ..)
(random ..)
(include ..)
(read-file ..)
(write-file ..)
(read-url ..)
(system-cmd ..)
(ls-dir ..)
(is-file? ..)
(is-dir? ..)
(parse-csv ..)
(parse-json ..)
(save-csv ..)
(get-universal-time ..)
(date-to-str ..)
(str-to-date ..)
(date-add ..)
(debug ..)
(display ..)
(replace ..)
(regex-search? ..)
(string-pad str len char rpad_lpad)
(int ..)
(float ..)
(eval ..)
(type ..)
(parse ..)
(xx ..)