JavaScript regular expression
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Presentation used to give an introduction to Regular Expression in JavaScript at MercadoLibre Inc. Spanish: https://www.youtube.com/watch?v=skG03rdOhpo
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please help with java questionsJAVA CODEplease check my code and.pdf
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JAVA CODE
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CLASS ADDRESS
public class Address{
private int streetNumber;
private String streetName;
private String city;
private String state;
private String country;
// streetNumber
// streetName
// city
// state
// country
public Address(int streetNumber, String streetName, String city, String state, String country) {
this.streetNumber = streetNumber;
this.streetName = streetName;
this.city = city;
this.state = state;
this.country = country;
}
//return the streetNumber
public int getStreetNumber() {
return streetNumber;
}
// set street number
public void setStreetNumber(int streetNumber) {
this.streetNumber = streetNumber;
}
//return the streetName
public String getStreetName() {
return streetName;
}
// set street name
public void setStreetName(String streetName) {
this.streetName = streetName;
}
//return the city
public String getCity() {
return city;
}
//set the city
public void setCity(String city) {
this.city = city;
}
//return the state
public String getState() {
return state;
}
//the state to set
public void setState(String state) {
this.state = state;
}
// return the country
public String getCountry() {
return country;
}
// tset country
public void setCountry(String country) {
this.country = country;
}
// see java.lang.Object#toString()
@Override
public String toString() {
return \" [streetNumber=\" + streetNumber + \", streetName=\" + streetName
+ \", city=\" + city + \", state=\" + state + \", country=\"
+ country + \"]\";
}
}
////////////////////////////////////////////////////////////////////////////////////////
CLASS PERSON
public class Person extends Address {
private String name;
public Person (int streetNumber, String streetName, String city, String state, String country,
String name) {
super(streetNumber, streetName, city, state, country);
this.name = name;
}
//retuurn name
public String getName() {
return name;
}
// set name
public void setName(String name) {
this.name = name;
}
//see java.lang.Object#toString()
@Override
public String toString() {
return \"Person [name=\" + name + \", getStreetNumber()=\"
+ getStreetNumber() + \", getStreetName()=\" + getStreetName()
+ \", getCity()=\" + getCity() + \", getState()=\" + getState()
+ \", getCountry()=\" + getCountry() + \", toString()=\"
+ super.toString() + \", getClass()=\" + getClass()
+ \", hashCode()=\" + hashCode() + \"]\";
}
}
/////////////////////////////////////////////////////////////////
CLASS STUDENT
import java.util.ArrayList;
import java.util.List;
public class Student extends Person {
private String CIN;
List courses;
public Student(int streetNumber, String streetName, String city, String state, String country,
String name, String CIN) {
super(streetNumber, streetName, city, state, country, name);
// Auto-generated constructor stub
this.CIN = CIN;
courses = new ArrayList();
}
// reutrn cin
public String getCIN() {
return CIN;
}
// set cin
public void setCIN(String cIN) {
CIN = cIN;
}
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----------Evaluator-java---------------- package evaluator- import j.docx
**********Evaluator.java****************
package evaluator;
import java.util.*;
import operand.Operand;
import operator.Operator;
public class Evaluator {
private Stack<Operand> operandStack;
private Stack<Operator> operatorStack;
private StringTokenizer tokenizer;
private static final String DELIMITERS = "+-*^/() ";
public Evaluator() {
operandStack = new Stack<Operand>();
operatorStack = new Stack<Operator>();
}
public int eval(String expression) {
int result = 0;
String token;
Operator hashOpr = Operator.operators.get("#");
oprStack.push(hashOpr);
String delimiters = "+-*/#!";
// The 3rd argument is true to indicate that the delimiters should be used
// as tokens, too. But, we'll need to remember to filter out spaces.
this.tokenizer = new StringTokenizer(expression, DELIMITERS, true);
while (this.tokenizer.hasMoreTokens()) {
// filter out spaces
if (!(token = this.tokenizer.nextToken()).equals(" ")) {
// check if token is an operand
if (Operand.check(token)) {
operandStack.push(new Operand(token));
} else {
if (!Operator.check(token)) {
System.out.println("*****invalid token******");
System.exit(1);
}
// TODO Operator is abstract - this line will need to be fixed:
// ( The Operator class should contain an instance of a HashMap,
// and values will be instances of the Operators. See Operator class
// skeleton for an example. )
Operator newOperator = null; // new Operator( token );
while (operatorStack.peek().priority() >= newOperator.priority()) {
// note that when we eval the expression 1 - 2 we will
// push the 1 then the 2 and then do the subtraction operation
// This means that the first number to be popped is the
// second operand, not the first operand - see the following code
Operator oldOpr = operatorStack.pop();
Operand op2 = operandStack.pop();
Operand op1 = operandStack.pop();
operandStack.push(oldOpr.execute(op1, op2));
}
operatorStack.push(newOperator);
}
}
}
// Control gets here when we've picked up all of the tokens; you must add
// code to complete the evaluation - consider how the code given here
// will evaluate the expression 1+2*3
// When we have no more tokens to scan, the operand stack will contain 1 2
// and the operator stack will have + * with 2 and * on the top;
// In order to complete the evaluation we must empty the stacks (except
// the init operator on the operator stack); that is, we should keep
// evaluating the operator stack until empty
// Suggestion: create a method that takes an operator as argument and
// then executes the while loop; also, move the stacks out of the main
// method
return 0;
}
/**
* Class to help test your Evaluator:
* javac EvaluatorTester
* java EvaluatorTester "1+2" "3*5"
*/
public static void main(String[] args) {
Evaluator evaluator = new Evaluator();
for (String arg : args) {
System.out.format("%s = %d\n", arg, evaluator.eval(arg));
}
}
}
************************************Operand.Java**************************************************
package operand;
public class Operand {
public .
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please help with java questionsJAVA CODEplease check my code and.pdf
please help with java questions
JAVA CODE
please check my code and help my questions
CLASS ADDRESS
public class Address{
private int streetNumber;
private String streetName;
private String city;
private String state;
private String country;
// streetNumber
// streetName
// city
// state
// country
public Address(int streetNumber, String streetName, String city, String state, String country) {
this.streetNumber = streetNumber;
this.streetName = streetName;
this.city = city;
this.state = state;
this.country = country;
}
//return the streetNumber
public int getStreetNumber() {
return streetNumber;
}
// set street number
public void setStreetNumber(int streetNumber) {
this.streetNumber = streetNumber;
}
//return the streetName
public String getStreetName() {
return streetName;
}
// set street name
public void setStreetName(String streetName) {
this.streetName = streetName;
}
//return the city
public String getCity() {
return city;
}
//set the city
public void setCity(String city) {
this.city = city;
}
//return the state
public String getState() {
return state;
}
//the state to set
public void setState(String state) {
this.state = state;
}
// return the country
public String getCountry() {
return country;
}
// tset country
public void setCountry(String country) {
this.country = country;
}
// see java.lang.Object#toString()
@Override
public String toString() {
return \" [streetNumber=\" + streetNumber + \", streetName=\" + streetName
+ \", city=\" + city + \", state=\" + state + \", country=\"
+ country + \"]\";
}
}
////////////////////////////////////////////////////////////////////////////////////////
CLASS PERSON
public class Person extends Address {
private String name;
public Person (int streetNumber, String streetName, String city, String state, String country,
String name) {
super(streetNumber, streetName, city, state, country);
this.name = name;
}
//retuurn name
public String getName() {
return name;
}
// set name
public void setName(String name) {
this.name = name;
}
//see java.lang.Object#toString()
@Override
public String toString() {
return \"Person [name=\" + name + \", getStreetNumber()=\"
+ getStreetNumber() + \", getStreetName()=\" + getStreetName()
+ \", getCity()=\" + getCity() + \", getState()=\" + getState()
+ \", getCountry()=\" + getCountry() + \", toString()=\"
+ super.toString() + \", getClass()=\" + getClass()
+ \", hashCode()=\" + hashCode() + \"]\";
}
}
/////////////////////////////////////////////////////////////////
CLASS STUDENT
import java.util.ArrayList;
import java.util.List;
public class Student extends Person {
private String CIN;
List courses;
public Student(int streetNumber, String streetName, String city, String state, String country,
String name, String CIN) {
super(streetNumber, streetName, city, state, country, name);
// Auto-generated constructor stub
this.CIN = CIN;
courses = new ArrayList();
}
// reutrn cin
public String getCIN() {
return CIN;
}
// set cin
public void setCIN(String cIN) {
CIN = cIN;
}
pub.
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----------Evaluator-java---------------- package evaluator- import j.docx
**********Evaluator.java****************
package evaluator;
import java.util.*;
import operand.Operand;
import operator.Operator;
public class Evaluator {
private Stack<Operand> operandStack;
private Stack<Operator> operatorStack;
private StringTokenizer tokenizer;
private static final String DELIMITERS = "+-*^/() ";
public Evaluator() {
operandStack = new Stack<Operand>();
operatorStack = new Stack<Operator>();
}
public int eval(String expression) {
int result = 0;
String token;
Operator hashOpr = Operator.operators.get("#");
oprStack.push(hashOpr);
String delimiters = "+-*/#!";
// The 3rd argument is true to indicate that the delimiters should be used
// as tokens, too. But, we'll need to remember to filter out spaces.
this.tokenizer = new StringTokenizer(expression, DELIMITERS, true);
while (this.tokenizer.hasMoreTokens()) {
// filter out spaces
if (!(token = this.tokenizer.nextToken()).equals(" ")) {
// check if token is an operand
if (Operand.check(token)) {
operandStack.push(new Operand(token));
} else {
if (!Operator.check(token)) {
System.out.println("*****invalid token******");
System.exit(1);
}
// TODO Operator is abstract - this line will need to be fixed:
// ( The Operator class should contain an instance of a HashMap,
// and values will be instances of the Operators. See Operator class
// skeleton for an example. )
Operator newOperator = null; // new Operator( token );
while (operatorStack.peek().priority() >= newOperator.priority()) {
// note that when we eval the expression 1 - 2 we will
// push the 1 then the 2 and then do the subtraction operation
// This means that the first number to be popped is the
// second operand, not the first operand - see the following code
Operator oldOpr = operatorStack.pop();
Operand op2 = operandStack.pop();
Operand op1 = operandStack.pop();
operandStack.push(oldOpr.execute(op1, op2));
}
operatorStack.push(newOperator);
}
}
}
// Control gets here when we've picked up all of the tokens; you must add
// code to complete the evaluation - consider how the code given here
// will evaluate the expression 1+2*3
// When we have no more tokens to scan, the operand stack will contain 1 2
// and the operator stack will have + * with 2 and * on the top;
// In order to complete the evaluation we must empty the stacks (except
// the init operator on the operator stack); that is, we should keep
// evaluating the operator stack until empty
// Suggestion: create a method that takes an operator as argument and
// then executes the while loop; also, move the stacks out of the main
// method
return 0;
}
/**
* Class to help test your Evaluator:
* javac EvaluatorTester
* java EvaluatorTester "1+2" "3*5"
*/
public static void main(String[] args) {
Evaluator evaluator = new Evaluator();
for (String arg : args) {
System.out.format("%s = %d\n", arg, evaluator.eval(arg));
}
}
}
************************************Operand.Java**************************************************
package operand;
public class Operand {
public .
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JavaScript regular expression
- 1. GETTING STARTED JavaScript Regular Expression REFERENCES Douglas Crockford, JavaScript: The Good Parts Jan Goyvaerts and Steven Levithan, Regular Expression Cookbook Stoyan Stefanov, Object-Oriented JavaScript
- 2. INTRODUCTION
- 3. INTRODUCTION • A regular expression is a specific kind of text pattern. • JavaScript’s Regular Expression feature was borrowed from Perl. • You can use it with many methods: • match, replace, search, split in strings • exec, test in regular expresion object
- 4. CONSTRUCTION
- 5. LITERAL var re = //;
- 6. LITERAL var re = /pattern/;
- 7. LITERAL var re = /pattern/flags;
- 8. LITERAL var re = /pattern/flags;
- 9. CONSTRUCTOR var re = new RegExp();
- 10. CONSTRUCTOR var re = new RegExp(pattern);
- 11. CONSTRUCTOR var re = new RegExp(pattern, flags);
- 12. ELEMENTS
- 13. METACHARACTERS / [] - {} () | . * + ? ^ $
- 14. START LINE / [] - {} () | . * + ? ^ $
- 15. END LINE / [] - {} () | . * + ? ^ $
- 16. ANY CHARACTER EXCEPT END LINE / [] - {} () | . * + ? ^ $
- 17. SEQUENCE
- 18. FACTOR
- 19. CHOICE / [] - {} () | . * + ? ^ $
- 20. CHOICE
- 21. ESCAPE / [] - {} () | . * + ? ^ $
- 22. ESCAPE
- 23. GROUP / [] - {} () | . * + ? ^ $
- 24. GROUP
- 25. CLASS / [] - {} () | . * + ? ^ $
- 26. CLASS
- 27. QUANTIFIERS / [] - {} () | . * + ? ^ $
- 28. QUANTIFIER - OPTIONAL / [] - {} () | . * + ? ^ $
- 29. QUANTIFIER - ZERO OR MORE / [] - {} () | . * + ? ^ $
- 30. QUANTIFIER - ONE OR MORE / [] - {} () | . * + ? ^ $
- 31. QUANTIFIER - RANGE / [] - {} () | . * + ? ^ $
- 32. QUANTIFIER
- 33. THANKS