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The Intl.getCanonicalLocales()
method returns an array containing the canonical locale names. Duplicates will be omitted and elements will be validated as structurally valid language tags.
The
Map
object is a simple key/value map. Any value (both objects and
primitive values ) may be used as either a key or a value.
The Map[@@species]
accessor property returns the Map
constructor.
The
Map
.prototype
property represents the prototype for the
Map
constructor.
The
size
accessor property returns the number of elements in a
Map
object.
Math
is a built-in object that has properties and methods for mathematical constants and functions. Not a function object.
The Math.abs()
function returns the absolute value of a number, that is
The Math.acos()
function returns the arccosine (in radians) of a number, that is
The Math.acosh()
function returns the hyperbolic arc-cosine of a number, that is
The Math.asin()
function returns the arcsine (in radians) of a number, that is
The Math.asinh()
function returns the hyperbolic arcsine of a number, that is
The Math.atan()
function returns the arctangent (in radians) of a number, that is
The Math.atan2()
function returns the arctangent of the quotient of its arguments.
The Math.atanh()
function returns the hyperbolic arctangent of a number, that is
The Math.cbrt()
function returns the cube root of a number, that is
The Math.ceil()
function returns the smallest integer greater than or equal to a given number.
The Math.cos()
function returns the cosine of a number.
The
Math.cosh()
function returns the hyperbolic cosine of a number, that can be expressed using the
constant e :
The Math.E
property represents the base of natural logarithms, e, approximately 2.718.