Built-in Predicates

Number predicates

int/integer

Returns true if data is an integer.

finite

Returns true if data is a finite number.

number

Returns true if data is a number (can be double or integer).

odd

even

positive

Returns true if data is a number greater than zero.

negative

Returns true if data is anumber smaller than zero.

zero

Returns true if data is the number zero.

Why: To easily construct specs for >= 0.

Type predicates

str/string

Returns true if data is a string.

fn

Returns true if data is a function.

Long-form function not possible as it's a keyword.

sym/symbol

Returns true if data is a Symbol.

nil

Returns true if data is null or undefined.

bool/boolean

Returns true if data is a boolean.

date

Returns true if data is a Date.

obj/object

Returns true if data is a plain object.

array

Returns true if data is an Array.

set

Returns true if data is a Set.

Collection predicates

coll

Returns true if data is an Array or Set.