JavaScript Core Reference - Beginning JavaScript - page 668

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Method introduced description

some(testFn(element,
index, array))

JavaScript 1.6 Iterates over the array, executing testFn()

on every element. Returns true if at least one
result of testFn() is true .

JavaScript 1.1 Sorts the elements of the array. Executes

sortFn() for sorting if it is provided.

sort([sortFn(a,b)])

splice(startIndex [,
length, value1, ...)

JavaScript 1.2 Removes the amount of elements denoted

by length starting at startIndex . Provided
values replace the deleted elements. Returns
the deleted elements.

JavaScript 1.1 Converts the Array object into a string.

toString()

unshift(value1 [,
value2, ...])

JavaScript 1.2 Adds elements to the beginning of the array

and returns the new length.

JavaScript 1.1 Returns the primitive value of the array.

valueOf()

Boolean
The Boolean object is used as a wrapper for a boolean value. It was introduced in JavaScript 1.1. It
is created with the Boolean constructor, which takes as a parameter the initial value for the object
(if this is not a boolean value, it will be converted into one).

Falsey values are null , undefined , "" , and 0 . All other values are considered truthy.
Properties

property introduced description

JavaScript 1.1 Specifies the function that creates an object's prototype.

constructor

JavaScript 1.1 Returns the prototype for the object, which can be used to

extend the object's interface.

prototype

Methods

Method introduced description

JavaScript 1.1 Converts the Boolean object into a string.

toString()

JavaScript 1.1 Returns the primitive value of the Boolean object.

valueOf()

date
The Date object is used to represent a given date‐time. It was introduced in JavaScript 1.0.