Page 83 - DCAP202_Fundamentals of Web Programming

Fundamentals of Web Programming

Notes
Table 6.3: Different Methods Used in Array
Method Description
concat() Joins two or more arrays, and returns a copy of the joined arrays
join() Joins all elements of an array into a string
pop() Removes the last element of an array, and returns that element
push() Adds new elements to the end of an array, and returns the new length
reverse() Reverses the order of the elements in an array
shift() Removes the first element of an array, and returns that element
slice() Selects a part of an array, and returns the new array
sort() Sorts the elements of an array
splice() Adds/Removes elements from an array
toString() Converts an array to a string, and returns the result
Adds new elements to the beginning of an array, and returns the new
unshift()
length
valueOf() Returns the primitive value of an array

Self Assessment

Fill in the blanks:
17. An ........................... is a special variable, which can hold more than one value, at a time.
18. Each element in the array has its own ........................... so that it can be easily accessed.

6.10 Summary

 Java script is a browser-interpreted language that was created to access all elements of
HTML and the browser.
 JavaScript is the scripting language implemented on web which is used to add several
functionalities, validating the form, as well as communicating with servers etc.
 JavaScript is most commonly used as a client side scripting language.
 JavaScript is a scripting language designed primarily for adding interactivity to Web
pages and creating Web applications.
 A program can do many things, including calculations, sorting names, preparing phone
lists, displaying images, validating forms, ad infinitum.

 String literals are rows of characters enclosed in either double or single quotes.
 There are two types of data: primitive and composite.
 An array can hold all your variable values under a single name. And you can access the
values by referring to the array name.

6.11 Keywords

Array: An array is a special variable, which can hold more than one value, at a time.
Boolean literals: Boolean literals are logical values that have only one of two values, true or
false.

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