< arg arg [...]
Less than comparison. Applies to numbers, strings, symbols, or
chars. If multiple arguments are given, the sequence must be monotonically
increasing.
>(< 1 2)
t
>(< 1 2 3)
t
>(< 1 3 2)
nil
>(< "a" "b")
t
>(< 'a 'b)
t
>(< #\a #\b)
t
> arg arg [...]
Greater than comparison. Applies to numbers, strings, symbols, or
chars. If multiple arguments are given, the sequence must be monotonically
decreasing.
>(> 1 2)
nil
>(> 3 1 2)
nil
>(> "a" "b")
nil
>(> 'a 'b)
nil
>(> #\a #\b)
nil
bound symbol
Tests is a symbol is bound.
>(bound 'foo)
nil
>(do
(assign y 1)
(bound 'y))
t
exact value
Tests if the value is an exact integer.
>(exact 3)
t
>(exact 3.14)
nil
is val [val ...]
Tests equality with eqv?
>(is 1 2)
nil
>(is "a" "a")
t
>(is '(1) '(1))
nil
>(is 1 1 1 1)
t
>(is nil '())
t
<= [arg ...]
The less-than-or-equal predicate. It can take an arbitrary number of arguments. There is no short-circuiting; all arguments are evaluated. Arguments must be comparable. Arguments can be numbers, characters or strings, but all arguments must be of the same type.
>(<= 2 2.0)
t
>(<= #\a #\c #\e)
t
>(<= "foo" "bar")
nil
>= [arg ...]
The greater-than-or-equal predicate. It can take an arbitrary number of arguments. There is no short-circuiting; all arguments are evaluated. Arguments must be comparable. Arguments can be numbers, characters or strings, but all arguments must be of the same type.
>(>= 2 3)
nil
>(>= #\a #\c #\e)
nil
>(>= "baz" "bar")
t
dotted x
Returns true if x is a dotted list.
isa x y
Tests if x has type y.
orf function ...
Creates a function on one variable that tests if any of the original functions are true when applied to the variable.
andf function ...
Creates a function on one variable that tests if all of the original functions are true when applied to the variable.
atend i s
Tests if index i is at the end or beyond in sequence or string s.
testify test
Creates a predicate from test. If test is a function, it is used as the predicate. Otherwise, a function is created to test equality with test using 'is'.
acons x
Tests if x is of type 'cons, i.e. if x is a non-nil list.
atom x
Tests if x is an atom, that is anything other than type 'cons. Note that atom and acons are opposites.
alist x
Tests if x is a list, i.e. nil or of type 'cons. The alist and acons predicates are the same except for nil, which is a list but an atom, not acons.
some test seq
Tests if any element of seq satisfies test. The sequence is either a list or a string. The test is a predicate or value, which is wrapped in testify.
all test seq
Tests if all elements of seq satisfies test. The sequence is either a list or a string. The test is a predicate or value, which is wrapped in testify.
isnt x y
Tests inequality; opposite of is.
iso x y
Compares x and y. If they are lists, they are compared element-by-element.
empty seq
Tests if seq is empty. Works on lists, strings, and tables.