Given some Google Analytics Tracking IDs, the task is to check if they are valid or not using regular expressions. Rules for the valid Tracking Id are:
- It is an alphanumeric string i.e., containing digits (0-9), alphabets (A-Z), and a Special character hyphen(-).
- The hyphen will come in between the given Google Analytics Tracking Id.
- Google Analytics Tracking Id should not start and end with a hyphen (-).
- It should not contains whitespaces and other special characters rather than a hyphen symbol.
Examples:
Input: str = ”AB-1234-45”
Output: TrueInput: str = ”AB-1234-”
Output: False
Explanation: Google Analytics Tracking Id never ends with a hyphen.
Approach: The problem can be solved based on the following idea:
Create a regex pattern to validate the number as written below:
regex = “^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$“Where,
- ^: Indiactes the start of the string
- [A-Z]{2}: This pattern will allow two of the preceding items if they are uppercase alphabets (A-Z).
- [-]{0, 1}: This pattern will match zero or one of the preceding items if it is a hyphen symbol.
- [0-9]{1}: This pattern will allow one or more than one preceding items if it is a digit.
- $ : Indicates the end of the string.
Follow the below steps to implement the idea:
- Create a regex expression forTracking Id.
- Use Pattern class to compile the regex formed.
- Use the matcher function to check whether the Tracking id is valid or not.
- If it is valid, return true. Otherwise, return false.
Below is the code implementation of the above-discussed approach:
// Java program to validate the // Google Analytics Tracking Id // using Regular Expression import java.util.regex.*;
class GFG {
// Function to validate the
// Google Analytics Tracking Id
public static boolean isValidGoogleAnaTrId(String str)
{
// Regex to check valid Google
// Analytics Tracking Id
String regex
= "^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$" ;
// Compile the Regex
Pattern p = Pattern.compile(regex);
// If the str
// is empty return false
if (str == null ) {
return false ;
}
// Pattern class contains matcher()
// method to find matching between
// given str Code using regex.
Matcher m = p.matcher(str);
// Return if the str Code
// matched the ReGex
return m.matches();
}
// Driver Code.
public static void main(String args[])
{
// Test Case 1:
String str1 = "AB-1234-45" ;
System.out.println(isValidGoogleAnaTrId(str1));
// Test Case 2:
String str2 = "AB-1234-" ;
System.out.println(isValidGoogleAnaTrId(str2));
// Test Case 3:
String str3 = "-AB-1234-" ;
System.out.println(isValidGoogleAnaTrId(str3));
// Test Case 4:
String str4 = "AB-1234-1" ;
System.out.println(isValidGoogleAnaTrId(str4));
}
} |
// C++ program to validate the // Google Analytics Tracking Id // using Regular Expression #include <bits/stdc++.h> #include <regex> using namespace std;
// Function to validate the // Google Analytics Tracking Id string isValidGoogleAnaTrId(string str) { // Regex to check valid
// Google Analytics Tracking Id
const regex pattern(
"^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$" );
// If the str
// is empty return false
if (str.empty()) {
return "false" ;
}
// Return true if the str
// matched the ReGex
if (regex_match(str, pattern)) {
return "true" ;
}
else {
return "false" ;
}
} // Driver Code int main()
{ // Test Case 1:
string str1 = "AB-1234-45" ;
cout << isValidGoogleAnaTrId(str1) << endl;
// Test Case 2:
string str2 = "AB-1234-" ;
cout << isValidGoogleAnaTrId(str2) << endl;
// Test Case 3:
string str3 = "-AB-1234-" ;
cout << isValidGoogleAnaTrId(str3) << endl;
// Test Case 4:
string str4 = "AB-1234-1" ;
cout << isValidGoogleAnaTrId(str4) << endl;
return 0;
} |
# Python3 program to validate # Google Analytics Tracking Id using Regular # Expression import re
# Function to validate # Google Analytics Tracking Id def isValidGoogleAnaTrId( str ):
# Regex to check valid Google Analytics Tracking Id
regex = "^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$"
# Compile the ReGex
p = re. compile (regex)
# If the string is empty
# return false
if ( str = = None ):
return "false"
# Return if the string
# matched the ReGex
if (re.search(p, str )):
return "true"
else :
return "false"
# Driver code if __name__ = = '__main__' :
# Test Case 1:
str1 = "AB-1234-45"
print (isValidGoogleAnaTrId(str1))
# Test Case 2:
str2 = "AB-1234-"
print (isValidGoogleAnaTrId(str2))
# Test Case 3:
str3 = "-AB-1234-"
print (isValidGoogleAnaTrId(str3))
# Test Case 4:
str4 = "AB-1234-1"
print (isValidGoogleAnaTrId(str4))
|
// C# program to validate the // Google Analytics Tracking Id // using Regular Expressions using System;
using System.Text.RegularExpressions;
class GFG {
// Main Method
static void Main( string [] args)
{
// Input strings to Match
// Google Analytics Tracking Id
string [] str = { "AB-1234-45" , "AB-1234-" ,
"-AB-1234-" , "AB-1234-1" };
foreach ( string s in str)
{
Console.WriteLine(
isValidGoogleAnaTrId(s) ? "true" : "false" );
}
Console.ReadKey();
}
// method containing the regex
public static bool isValidGoogleAnaTrId( string str)
{
string strRegex
= @"^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$" ;
Regex re = new Regex(strRegex);
if (re.IsMatch(str))
return ( true );
else
return ( false );
}
} |
<?php // PHP program to validate Google Analytics Tracking Id // Function to validate Google Analytics Tracking Id using regular expression function isValidGoogleAnaTrId( $str ){
if (preg_match( '/^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$/' , $str )) {
echo "true\n" ;
} else {
echo "false\n" ;
} } isValidGoogleAnaTrId( "AB-1234-45" );
isValidGoogleAnaTrId( "AB-1234-" );
isValidGoogleAnaTrId( "-AB-1234-" );
isValidGoogleAnaTrId( "AB-1234-1" );
?> |
// Javascript program to validate // Google Analytics Tracking Id using Regular Expression // Function to validate the // Google Analytics Tracking Id function isValidGoogleAnaTrId(str) {
// Regex to check valid
// Google Analytics Tracking Id
let regex = new RegExp(/^[A-Z]{2}[-]{0, 1}[0-9]{1, }[-]{0, 1}[0-9]{1, }$/);
// if str
// is empty return false
if (str == null ) {
return "false" ;
}
// Return true if the str
// matched the ReGex
if (regex.test(str) == true ) {
return "true" ;
}
else {
return "false" ;
}
} // Driver Code // Test Case 1: let str1 = "AB-1234-45" ;
console.log(isValidGoogleAnaTrId(str1)); // Test Case 2: let str2 = "AB-1234-" ;
console.log(isValidGoogleAnaTrId(str2)); // Test Case 3: let str3 = "-AB-1234-" ;
console.log(isValidGoogleAnaTrId(str3)); // Test Case 4: let str4 = "AB-1234-1" ;
console.log(isValidGoogleAnaTrId(str4)); |
true false false true
Time Complexity: O(N) for each testcase, where N is the length of the given string.
Auxiliary Space: O(1)
Related Articles: