Chronological sequence of developments:

Scripting languages gained more popularity with the explosion of World Wide Web (WWW) during 1990’s. Scripting languages are mainly used for developing web pages which are interpreted by the web browsers.

JavaScript appeared in 1994, developed by Netscape replaced the traditional static arrays.

All the character strings and arrays were of having dynamic lengths.

So, array indices are not checked for validity.

In 1995, PHP included the dynamic array properties of arrays from JSP and hashes from Perl.

Hashes are advanced form of array.

In an array, each element can be accessed by the index, but sometimes this becomes extremely difficult as the index itself is not known...

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Chapter 2, Problem 20PS

Chapter 2, Problem 22PS

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Chapter 2 Solutions

Concepts Of Programming Languages

Ch. 2 - In what year was Plankalkl designed? In what year...Ch. 2 - What two common data structures were included in...Ch. 2 - How were the pseudocodes of the early 1950s...Ch. 2 - Speedcoding was invented to overcome two...Ch. 2 - Prob. 5RQ Ch. 2 - Prob. 6RQ Ch. 2 - Prob. 7RQ Ch. 2 - Prob. 8RQ Ch. 2 - Prob. 9RQ Ch. 2 - Prob. 10RQ

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Solution Summary: The author explains that Scripting languages gained popularity with the explosion of World Wide Web during 1990’s. JavaScript appeared in 1994, developed by Netscape replaced the traditional static arrays, and PHP included the dynamic array properties of array

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