Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Ankith Reddy
Page 4 of 73
The addIfAbsent() method of CopyOnWriteArrayList in Java
The addIfAbsent() method appends the element if it is not in the list. If the element is already in the list, then FALSE is returned.The syntax is as follows.public boolean addIfAbsent(E ele)Here, ele is the element to be added to this list, if it is not already in the list.To work with CopyOnWriteArrayList class, you need to import the following package.import java.util.concurrent.CopyOnWriteArrayList;The following is an example to implement CopyOnWriteArrayList class addIfAbsent() method in Java.Exampleimport java.util.concurrent.CopyOnWriteArrayList; public class Demo { public static void main(String[] args) { CopyOnWriteArrayList arrList = new CopyOnWriteArrayList(); arrList.add(30); arrList.add(40); arrList.add(60); ...
Read MoreThe toString() method of Java AbstractCollection class
The toString() method of the AbstractCollection class is used to return the string representation of the elements of this collection.The syntax is as followspublic String toString()To work with AbstractCollection class in Java, import the following packageimport java.util.AbstractCollection;The following is an example to implement AbstractCollection toString() method in JavaExampleimport java.util.ArrayList; import java.util.AbstractCollection; public class Demo { public static void main(String[] args) { AbstractCollection absCollection = new ArrayList(); absCollection.add("HDD"); absCollection.add("Earphone"); absCollection.add("Headphone"); absCollection.add("Card Reader"); absCollection.add("SSD"); absCollection.add("Pen Drive"); System.out.println("Count ...
Read MoreHTML DOM activeElement Property
The HTML DOM activeElement property is a read-only property to return the currently focused element in the document.Following is the syntax −document.activeElementLet us now see an example to implement the DOM activeElement property −Example Heading Two Click in the element to get the active element. function display() { var a = document.activeElement.tagName; document.getElementById("myid").innerHTML = a; } OutputNow, click the element to display the same currently active element −
Read MoreHTML <form> autocomplete Attribute
The autocomplete attribute of the element allows you to set whether the autocomplete for the form should be on or off. The web browser automatically fills the values if the autocomplete is on. This only happens if the user already entered values before.Following is the syntax −Above, on | off values are to be set for autocomplete to appear or not. Set on if you want the browser to complete the entries based on previously entered values, whereas off doesn’t allow to complete the entries.Let us now see an example to implement the autocomplete attribute of the element ...
Read MoreIntStream toArray() method in Java
The toArray() method returns an array containing the elements of this stream.Set the elements in the stream with the IntStream class of() method.IntStream stream = IntStream.of(20, 40, 60, 70, 100, 120, 140);Now, display an array with the elements of this stream using the toArray() method.int[] myArr = stream.toArray();The following is the syntax.int[] toArray()The following is an example to implement IntStream toArray() method in Java.Exampleimport java.util.*; import java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream stream = IntStream.of(20, 40, 60, 70, 100, 120, 140); int[] myArr = stream.toArray(); System.out.println(Arrays.toString(myArr)); } }Output[20, 40, 60, 70, 100, 120, 140]
Read Morememset in C++
In this section we will see what is the purpose of memset() function in C++. This function converts the value of a character to unsigned character and copies it into each of first n character of the object pointed by the given str[]. If the n is larger than string size, it will be undefined.The syntax of the memset() functionvoid* memset( void* str, int c, size_t n);In this example will use one string, then convert each character to some other character up to length n.Example#include using namespace std; int main() { char str[] = "Hello World"; memset(str, 'o', ...
Read MoreDeclare variable as constant in C
Variables can be declared as constant using the const keyword or the #define preprocessor directive. Details about these are given as follows.The const keywordVariables can be declared as constants by using the “const” keyword before the datatype of the variable. The constant variables can be initialized once only. The default value of constant variables are zero.A program that demonstrates the declaration of constant variables in C using const keyword is given as follows.Example#include int main() { const int a; const int b = 12; printf("The default value of variable a : %d", a); printf("The value ...
Read MoreGenerate Random Float type number in Java
In order to generate Random float type numbers in Java, we use the nextFloat() method of the java.util.Random class. This returns the next random float value between 0.0 (inclusive) and 1.0 (exclusive) from the random generator sequence.Declaration −The java.util.Random.nextFloat() method is declared as follows −public float nextFloat()Let us see a program to generate random float type numbers in Java.Exampleimport java.util.Random; public class Example { public static void main(String[] args) { Random rd = new Random(); // creating Random object System.out.println(rd.nextFloat()); // displaying a random float value between 0.0 and 1.0 } }Output0.7739767Note ...
Read Morefilter_input() function in PHP
The filter_input() function gets a name of external variable and filters it optionally.Syntaxfilter_input(type, var, filtername, options)Parameterstype − There are five types of inputs to check i.e. INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV.var − The name of variable.filtername − The name of filter to get ID.options − Specifies options to use.ReturnThe filter_input() function returns the value of the variable on success, false on failure, or null if the parameter of variable is not set.Example
Read Morefilter_var() function in PHP
The filter_var() function is used to filter a variable with a specified filter.Syntaxfilter_var(variable, filter, options)Parametersvariable − The name of variable.filter − The name of filter to get ID.options − Specifies options to use.ReturnThe filter_var() function returns filtered data on success, or false on failure.Example
Read More