Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
7th Edition
ISBN: 9780134802213
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 9.5, Problem 9.26CP
Program Plan Intro
Tokenizing Strings:
- The tokenizing of a string denotes a process of breaking a string down into its components termed as tokens.
- The “split” method of “String” class could be used to tokenize strings.
- The character that separates tokens is termed as “delimiter”.
- The argument passed to “split” method denotes a regular expression.
- A regular expression is used to search for patterns in strings, files and other texts.
- To prevent leading or trailing whitespace characters in tokens, the string is been trimmed.
- The “trim” method of “String” class is been used for trimming purposes.
Given Code:
String str = “one two three four”;
String[] tokens = str.split(“ ”);
int x = tokens.length;
String first = tokens[0];
Explanation:
- The given code stores a string into variable “str”.
- The string is been split into tokens using “split” method.
- The count of tokens could be computed using “length” method.
- The first token in array is been stored into variable “first”.
Program Plan Intro
Tokenizing Strings:
- The tokenizing of a string denotes a process of breaking a string down into its components termed as tokens.
- The “split” method of “String” class could be used to tokenize strings.
- The character that separates tokens is termed as “delimiter”.
- The argument passed to “split” method denotes a regular expression.
- A regular expression is used to search for patterns in strings, files and other texts.
- To prevent leading or trailing whitespace characters in tokens, the string is been trimmed.
- The “trim” method of “String” class is been used for trimming purposes.
Given Code:
String str = “one two three four”;
String[] tokens = str.split(“ ”);
int x = tokens.length;
String first = tokens[0];
Explanation:
- The given code stores a string into variable “str”.
- The string is been split into tokens using “split” method.
- The count of tokens could be computed using “length” method.
- The first token in array is been stored into variable “first”.
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def swap_text(text):
Backstory:
Luffy wants to organize a surprise party for his friend Zoro and he wants to send a message to his friends, but he wants to encrypt the message so that Zoro cannot easily read it. The message is encrypted by exchanging pairs of characters.
Description: This function gets a text (string) and creates a new text by swapping each pair of characters, and returns a string with the modified text. For example, suppose the text has 6 characters, then it swaps the first with the second, the third with the fourth and the fifth with the sixth character.
Parameters: text is a string (its length could be 0)Return value: A string that is generated by swapping pairs of characters. Note that if the
Examples:
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→ 'ehllo'→ 'aPtr yof roZor!' → ''
length of the text is odd, the last character remains in the same position.
C++
Don't want copy paste answer
Overload the ~ operator to return the reversed elements of a String:
Object's Value Operator Call Resulting Object's Value
"bob" ~obj "bob"
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Java
Chapter 9 Solutions
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
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