- true.... only ±0 and NaN are "
falsy"
numbers console.log("0" ? true : false); // true.... only the
empty string is "
falsy" console.log(Boolean({})); //...
-
operand evaluated to a
value likened to
logically false, in
other words, a
falsy value). This is
identical to a short-circuit or with "last value" semantics...
-
objects evaluate to true.
Sometimes these classes of
expressions are
called falsy and truthy. For example, in Lisp, nil, the
empty list, is
treated as false...
-
objects evaluate to true.
Sometimes these classes of
expressions are
called falsy and truthy. For example, in Lisp, nil, the
empty list, is
treated as false...
-
compared against a
positive vector (truthy image) and a
negative vector (
falsy image). The
negative vector will
force learning in the network,
while the...
- This
contrasts with the || operator,
which would return "string" for all "
falsy" values, such as the ones below.
undefined ?? "string" // -> "string" null...
-
looks specifically for null or undefined, the ||
operator looks for any
falsy value: null, undefined, "", 0, NaN, and of course, false. In the following...
- sigils: "?"
indicates a
predicate method returning a
boolean or a
truthy or
falsy value, and "!"
indicates that the
method may have a
potentially unexpected...
- test specification.
Other built-in
matchers include toBe, toBeTruthy, toBe
Falsy, toContain, toBeDefined, toBeUndefined, toBeNull, toBeNaN, toBeGreaterThan...
