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The indexOf() method is used to return the index of the first occurrence of the specified element in this list. If the list is empty, it returns -1.The syntax is as follows.int indexOf(Object ob)Here, the parameter ob is the element to search for.To work with the AbstractList class, import the following package.import java.util.AbstractList;The following is an example to implement indexOf() method of the AbstractlList class in Java.Example Live Demoimport java.util.ArrayList; import java.util.AbstractList; public class Demo { public static void main(String[] args) { AbstractList myList = new ArrayList(); myList.add(5); myList.add(20); ... Read More
To get the difference between two number in MySQL, let us first create a demo tablemysql> create table findDifferenceDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> FirstNumber float, -> SecondNumber float -> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into findDifferenceDemo(FirstNumber, SecondNumber) values(4.2, 2.3); Query OK, 1 row affected (0.20 sec) mysql> insert into findDifferenceDemo(FirstNumber, SecondNumber) values(23.4, 5.6); Query OK, 1 row affected (0.14 sec) ... Read More
A binary tree which has at most two children, specified as left child and right child. This is a C++ Program to find the lowest common ancestor in a Binary Tree.AlgorithmBegin Create a structure n to declare data d, a left child pointer l and a right child pointer r. Create a function to create newnode. Call a function LCA() to Find lowest common ancestor in a binary tree: Assume node n1 and n2 present in the tree. If root is null, then return. If root is not null there are two cases. ... Read More
To create a date object in swift we’ll use DateComponents() of swift. We can do this In two ways. We’ll use Playground to test our code instead of simulator.We’ll use date component and calendar to create a date. We can create date component in two ways.Method 1Creating date using the default initializer of DateComponent().var date = DateComponents.init( calendar: , timeZone: , era: , year: , month: , day: , hour: , minute: , second: , nanosecond: , weekday: , weekdayOrdinal: , quarter: , weekOfMonth: , weekOfYear: , yearForWeekOfYear: )This will ask all the things like calendar type, date, day, month, ... Read More
This example demonstrate about How to build a Horizontal ListView with RecyclerViewStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken recycerview.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.annotation.TargetApi; import android.os.Build; import android.os.Bundle; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.DividerItemDecoration; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.Toolbar; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; ... Read More
Here, to convert Wrapper value array list into primitive array, we are considering Integer as Wrapper, whereas double as primitive.At first, declare an Integer array list and add elements to it −ArrayList < Integer > arrList = new ArrayList < Integer > (); arrList.add(5); arrList.add(10); arrList.add(15); arrList.add(20); arrList.add(25); arrList.add(30); arrList.add(45); arrList.add(50);Now, convert the above Integer array list to primitive array. Firstly, we set the same size for the double array and then assigned each valuefinal double[] arr = new double[arrList.size()]; int index = 0; for (final Integer value: arrList) { arr[index++] = value; }The following is an example to ... Read More
In this section we will see, how can write multiline macros in C. We can write multiline macros like functions, but for macros, each line must be terminated with backslash ‘\’ character. If we use curly braces ‘{}’ and the macros is ended with ‘}’, then it may generate some error. So we can enclose the entire thing into parenthesis.Please check the following program to get the idea about multiline macros.Example#include #define PRINT(x, str) ({\ printf("The number %d", x);\ printf(" is ");\ printf(#str);\ printf("");\ }) int main() { int x = 10; if(x % 2 == 0){ PRINT(x, EVEN); } }OutputThe number 10 is EVEN
Here we will see what are the differences between int and const_int& in C or C++.The int is basically the type of integer type data. And const is used to make something constant. If there is int& constant, then it indicates that this will hold the reference of some int type data. This reference value is constant itself. So the const is redundant. The compiler may return warning or some error.The const int& is same as int const&. So this refers to a constant integer. The integer cannot be modified through the reference.
Temporary register is also an 8-bit register which the programmer can’t access at all. It is temporarily stored inside 8085 microprocessor which is 8 bit operand to the instruction set. For example, when the fetching of instructions “MVI M, 34H” is done the instruction register IR register will receive the opcode for MVI M, and the Temp register receives 34H.The operations of arithmetic and logical sequence carried out involves two operands, among which one is operand is provided by the accumulator, and the other operand is provided by the Temp register. For example, in the addition process the instruction to ... Read More
This example demonstrates How to use Bar chart graph in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Open build.gradle(module level) and add library dependency.apply plugin: 'com.android.application' android { packagingOptions { exclude 'META-INF/proguard/androidx-annotations.pro' } packagingOptions { exclude 'META-INF/DEPENDENCIES' exclude 'META-INF/LICENSE' exclude 'META-INF/LICENSE.txt' exclude 'META-INF/license.txt' exclude 'META-INF/NOTICE' exclude 'META-INF/NOTICE.txt' exclude 'META-INF/notice.txt' ... Read More