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The contains() method of String class returns true if and only if this string contains the specified sequence of char values.ExampleLive Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { String str1 = "tutorials point", str2 = "http://"; CharSequence cs1 = "int"; // string contains the specified sequence of char values boolean retval = str1.contains(cs1); System.out.println("Method returns : " + retval); // string does not contain the specified sequence of char value retval = str2.contains("_"); System.out.println("Methods returns: " + retval); } }OutputMethod returns : true Methods returns: false
This is a C++ program to compute Cross Product of Two Vectors.Let us suppose, M = m1 * i + m2 * j + m3 * kN = n1 * i + n2 * j + n3 * k.So, cross product = (m2 * n3 – m3 * n2) * i + (m1 * n3 – m3 * n1) * j + (m1 * n1 – m2 * n1) * kwhere m2 * n3 – m3 * n2, m1 * n3 – m3 * n1 and m1 * n1 – m2 * n1 are the coefficients of unit vector along ... Read More
The isEmpty() method of the String class returns true if the length of the current string is 0.ExampleLive Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { String str = "tutorialspoint"; //prints length of string System.out.println("length of string = " + str.length()); //checks if the string is empty or not System.out.println("is this string empty? = " + str.isEmpty()); } }Outputlength of string = 14 is this string empty? = false
The toCharArray() method of a String class converts this string to a character array.ExampleLive Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { // converts String value to character array type value String str = " Java was developed by James Gosling"; char retval[] = str.toCharArray(); // displays the converted value System.out.println("Converted value to character array = "); System.out.println(retval); } }OutputConverted value to character array = Java was developed by James Gosling
You can compare two Strings in Java using the compareTo() method, equals() method or == operator.The compareTo() method compares two strings. The comparison is based on the Unicode value of each character in the strings. The character sequence represented by this String object is compared lexicographically to the character sequence represented by the argument string.The result is a negative integer if this String object lexicographically precedes the argument string.The result is a positive integer if this String object lexicographically follows the argument string.The result is zero if the strings are equal, compareTo returns 0 exactly when the equals(Object) method would ... Read More
In analyzing data or processing data using python, we come across situations where the given list has to be remodeled or reshaped to get lists with different columns. We can achieve that with multiple approaches as discussed below.Using SlicingWe can slice the list at certain elements to create the columnar structure. Here we convert the given list into a new list where the elements are split form the middle. We sue two for loops. The outer one splits the elements from the zeroth element to the second element and the inner one from the second element to the last.Example Live Demox ... Read More
Java provides the java.util.regex package for pattern matching with regular expressions. Java regular expressions are very similar to the Perl programming language and very easy to learn.A regular expression is a special sequence of characters that help you match or find other strings or sets of strings, using a specialized syntax held in a pattern. They can be used to search, edit, or manipulate text and data.The replaceFirst() and replaceAll() methods replace the text that matches a given regular expression. As their names indicate, replaceFirst replaces the first occurrence, and replaceAll replaces all occurrences.ExampleLive Demoimport java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexMatches { ... Read More
The intern() method of the String class returns a canonical representation for the string object. It follows that for any two strings s and t, s.intern() == t.intern() is true if and only if s.equals(t) is true.ExampleLive Demoimport java.io.*; public class Test { public static void main(String args[]) { String Str1 = new String("Welcome to Tutorialspoint.com"); String Str2 = new String("WELCOME TO SUTORIALSPOINT.COM"); System.out.print("Canonical representation:" ); System.out.println(Str1.intern()); System.out.print("Canonical representation:" ); System.out.println(Str2.intern()); } }OutputCanonical representation: Welcome to Tutorialspoint.com Canonical representation: WELCOME TO ... Read More
Python provides lot of flexibility to handle different types of data structures. There may be a need when you have to convert one Data Structure to another for a better use or better analysis of the data. In this article we will see how to convert a Python set to a Python dictionary.Using zip and dictThe dict() can be used to take input parameters and convert them to a dictionary. We also use the zip function to group the keys and values together which finally become the key value pair in the dictionary.Example Live Demolist_keys = {1, 2, 3, 4} list_values ... Read More
We can verify whether the given string is empty using the isEmpty() method of the String class. This method returns true only if length() is 0.ExampleLive Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { String str = "tutorialspoint"; // prints length of string System.out.println("length of string = " + str.length()); // checks if the string is empty or not System.out.println("is this string empty? = " + str.isEmpty()); } }Outputlength of string = 14 is this string empty? = false