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JavaScript Course \| Printing Hello World in JavaScript	03 Jan, 2022 Previous article: JavaScript Course \| What is JavaScript? Whenever we write javascript we make use of the ‘script’ tag. We know what a normal HTML document is made up of. The ‘script’ tag is used to write javascript code and this ‘script’ tag is either placed inside the ‘head’ tag or inside the ‘body’ tag...	[ { "code": null, "e": 52, "s": 24, "text": "\n03 Jan, 2022" }, { "code": null, "e": 111, "s": 52, "text": "Previous article: JavaScript Course \| What is JavaScript? " }, { "code": null, "e": 362, "s": 111, "text": "Whenever we write javascript we make use of th...
Java Program to Determine the Unicode Code Point at Given Index in String	21 Apr, 2022 ASCII is a code that converts the English alphabets to numerics as numeric can convert to the assembly language which our computer understands. For that, we have assigned a number against each character ranging from 0 to 127. Alphabets are case-sensitive lowercase and uppercase are treated differently. Com...	[ { "code": null, "e": 28, "s": 0, "text": "\n21 Apr, 2022" }, { "code": null, "e": 713, "s": 28, "text": "ASCII is a code that converts the English alphabets to numerics as numeric can convert to the assembly language which our computer understands. For that, we have assigned a nu...
Python \| Pandas dataframe.corrwith()	16 May, 2020 Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandasis one of those packages and makes importing and analyzing data much easier. Pandas dataframe.corrwith() is used to compute pairwise correlation between rows or columns of...	[ { "code": null, "e": 28, "s": 0, "text": "\n16 May, 2020" }, { "code": null, "e": 241, "s": 28, "text": "Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandasis one of those packages and makes impo...
Sorting 2D Vector of Pairs in C++	12 Jul, 2022 A 2D vector also known as vector of vectors is a vector in which each element is a vector on its own. In other words, It is a matrix implemented with the help of vectors. What is a 2D vector of pairs? A 2D vector of pairs is a vector in which each element is a vector of pairs on its own. In other words, It...	[ { "code": null, "e": 28, "s": 0, "text": "\n12 Jul, 2022" }, { "code": null, "e": 199, "s": 28, "text": "A 2D vector also known as vector of vectors is a vector in which each element is a vector on its own. In other words, It is a matrix implemented with the help of vectors." }...
How to add/remove values in the array in PowerShell?	An array is always a fixed size. To add value to the array, you need to create a new copy of the array and add value to it. To do so, you simply need to use += operator. For example, you have an existing array as given below. $array = 1,2,3,4,5 To add value “Hello” to the array, we will use += sign. $array += "Hello" N...	[ { "code": null, "e": 1232, "s": 1062, "text": "An array is always a fixed size. To add value to the array, you need to create a new copy of the array and add value to it. To do so, you simply need to use += operator." }, { "code": null, "e": 1288, "s": 1232, "text": "For example,...
Const member functions in C++ - GeeksforGeeks	27 Mar, 2021 Like member functions and member function arguments, the objects of a class can also be declared as const. an object declared as const cannot be modified and hence, can invoke only const member functions as these functions ensure not to modify the object. A const object can be created by prefixing the cons...	[ { "code": null, "e": 23769, "s": 23741, "text": "\n27 Mar, 2021" }, { "code": null, "e": 24210, "s": 23769, "text": "Like member functions and member function arguments, the objects of a class can also be declared as const. an object declared as const cannot be modified and hence...
Difference Between Virtual and Pure Virtual Function	In this post, we will understand the difference between virtual and pure virtual functions. It has its own definition inside the class. It has its own definition inside the class. The base class can override a virtual function. The base class can override a virtual function. It doesn’t have a derived class. It doesn’t ...	[ { "code": null, "e": 1154, "s": 1062, "text": "In this post, we will understand the difference between virtual and pure virtual functions." }, { "code": null, "e": 1198, "s": 1154, "text": "It has its own definition inside the class." }, { "code": null, "e": 1242, ...
Aptitude - Speed and Distance	Speed = Distance⁄Time Time = Distance⁄Speed P km/hr = (P x 5⁄18)m/sec P m/sec = (P x 18⁄5)km/hr If the ratio of the speeds of P and Q is p:q, then the ratio of the times taken by them to cover the same distance is 1⁄p:1⁄q or q : p The average speed of the journey is (2pq⁄p+q)km/hr if a man covers a certain distanc...	[ { "code": null, "e": 3989, "s": 3892, "text": "Speed = Distance⁄Time\nTime = Distance⁄Speed\nP km/hr = (P x 5⁄18)m/sec\nP m/sec = (P x 18⁄5)km/hr\n" }, { "code": null, "e": 4107, "s": 3989, "text": "If the ratio of the speeds of P and Q is p:q, then the ratio of the times taken b...
Data Structure and Algorithms Binary Search	Binary search is a fast search algorithm with run-time complexity of Ο(log n). This search algorithm works on the principle of divide and conquer. For this algorithm to work properly, the data collection should be in the sorted form. Binary search looks for a particular item by comparing the middle most item of the col...	[ { "code": null, "e": 2814, "s": 2580, "text": "Binary search is a fast search algorithm with run-time complexity of Ο(log n). This search algorithm works on the principle of divide and conquer. For this algorithm to work properly, the data collection should be in the sorted form." }, { "code...
Binary Search - GeeksforGeeks	25 Mar, 2022 Problem: Given a sorted array arr[] of n elements, write a function to search a given element x in arr[]. Examples: Input: arr[] = {10, 20, 30, 50, 60, 80, 110, 130, 140, 170}, x = 110Output: 6Explanation: Element x is present at index 6 Input: arr[] = {10, 20, 30, 40, 60, 110, 120, 130, 170}, x = 175Out...	[ { "code": null, "e": 24031, "s": 24000, "text": " \n25 Mar, 2022\n" }, { "code": null, "e": 24137, "s": 24031, "text": "Problem: Given a sorted array arr[] of n elements, write a function to search a given element x in arr[]." }, { "code": null, "e": 24148, "s": 2...
LESS - Import Directives	The @import directive is used to import the files in the code. It spreads the LESS code over different files and allows to maintain the structure of code easily. You can put the @import statements anywhere in the code. For instance, you can import the file by using @import keyword as @import "file_name.less". You can u...	[ { "code": null, "e": 2769, "s": 2550, "text": "The @import directive is used to import the files in the code. It spreads the LESS code over different files and allows to maintain the structure of code easily. You can put the @import statements anywhere in the code." }, { "code": null, "e...
GDB - Quick Guide	A debugger is a program that runs other programs, allowing the user to exercise control over these programs, and to examine variables when problems arise. GNU Debugger, which is also called gdb, is the most popular debugger for UNIX systems to debug C and C++ programs. GNU Debugger helps you in getting information abou...	[ { "code": null, "e": 1864, "s": 1709, "text": "A debugger is a program that runs other programs, allowing the user to exercise control over these programs, and to examine variables when problems arise." }, { "code": null, "e": 1979, "s": 1864, "text": "GNU Debugger, which is also...
CSS \| translate3d() Function - GeeksforGeeks	07 Aug, 2019 The translate3d() function is an inbuilt function which is used to reposition an element in 3D space. Syntax: translate3d( tx, ty, tz ) Parameters: This function accepts three parameters as mentioned above and described below: tx: This parameter holds the length of translation corresponding to x-axis. This...	[ { "code": null, "e": 25296, "s": 25268, "text": "\n07 Aug, 2019" }, { "code": null, "e": 25398, "s": 25296, "text": "The translate3d() function is an inbuilt function which is used to reposition an element in 3D space." }, { "code": null, "e": 25406, "s": 25398, ...
Apache Presto - split(string,delimiter)	presto:default> select split('apache presto','e') as string_split; string_split ------------------- [apach, pr, sto] 46 Lectures 3.5 hours Arnab Chakraborty 23 Lectures 1.5 hours Mukund Kumar Mishra 16 Lectures 1 hours Nilay Mehta 52 Lectures 1.5 hours B...	[ { "code": null, "e": 2074, "s": 2006, "text": "presto:default> select split('apache presto','e') as string_split; " }, { "code": null, "e": 2133, "s": 2074, "text": " string_split \n------------------- \n [apach, pr, sto] \n" }, { "code": null, "e": 2168, "s": ...
Find the first repeated word in a string - GeeksforGeeks	22 Apr, 2022 Given a string, Find the 1st repeated word in a stringExamples: Input : "Ravi had been saying that he had been there" Output : had Input : "Ravi had been saying that" Output : No Repetition Input : "he had had he" Output : he question source : https://www.geeksforgeeks.org/goldman-sachs-interview-experi...	[ { "code": null, "e": 24934, "s": 24906, "text": "\n22 Apr, 2022" }, { "code": null, "e": 24999, "s": 24934, "text": "Given a string, Find the 1st repeated word in a stringExamples: " }, { "code": null, "e": 25163, "s": 24999, "text": "Input : \"Ravi had been s...
Create an ordered list in HTML	The HTML <ol> tag is used for creating an ordered list. You can try to run the following code to create an ordered list using the <ol> tag − The HTML <ol> tag supports the following additional attributes − You can try to run the following code to create an ordered list using the <ol> tag − <!DOCTYPE html> <html> <he...	[ { "code": null, "e": 1203, "s": 1062, "text": "The HTML <ol> tag is used for creating an ordered list. You can try to run the following code to create an ordered list using the <ol> tag −" }, { "code": null, "e": 1268, "s": 1203, "text": "The HTML <ol> tag supports the following ...
Python \| Pandas series.cummax() to find Cumulative maximum of a series - GeeksforGeeks	20 Nov, 2018 Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric Python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas Series.cummax() is used to find Cumulative maximum of a series. In cumulative maximum,...	[ { "code": null, "e": 24230, "s": 24202, "text": "\n20 Nov, 2018" }, { "code": null, "e": 24444, "s": 24230, "text": "Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric Python packages. Pandas is one of those packages a...
Solidity – While, Do-While, and For Loop	11 May, 2022 Loops are used when we have to perform an action over and over again. While writing a contract there may be a situation when we have to do some action repeatedly, In this situation, loops are implemented to reduce the number of lines of the statements. Solidity supports following loops too ease down the pr...	[ { "code": null, "e": 28, "s": 0, "text": "\n11 May, 2022" }, { "code": null, "e": 355, "s": 28, "text": "Loops are used when we have to perform an action over and over again. While writing a contract there may be a situation when we have to do some action repeatedly, In this situ...
How to handle the modal closing event in Twitter Bootstrap?	03 Jun, 2020 Modal Closing Event in Twitter Bootstrap \| Set 1 Prerequisite Knowledge: Bootstrap 4 \| Modal Twitter Bootstrap’s modal class offer a few events that are fired at the standard Bootstrap modal class. Bootstrap Modals offer a lightweight, multi-purpose JavaScript popup that is customizable and responsive. The...	[ { "code": null, "e": 54, "s": 26, "text": "\n03 Jun, 2020" }, { "code": null, "e": 103, "s": 54, "text": "Modal Closing Event in Twitter Bootstrap \| Set 1" }, { "code": null, "e": 147, "s": 103, "text": "Prerequisite Knowledge: Bootstrap 4 \| Modal" }, { ...
Rotate a Linked List	24 Jun, 2022 Given a singly linked list, rotate the linked list counter-clockwise by k nodes. Where k is a given positive integer. For example, if the given linked list is 10->20->30->40->50->60 and k is 4, the list should be modified to 50->60->10->20->30->40. Assume that k is smaller than the count of nodes in a link...	[ { "code": null, "e": 52, "s": 24, "text": "\n24 Jun, 2022" }, { "code": null, "e": 368, "s": 52, "text": "Given a singly linked list, rotate the linked list counter-clockwise by k nodes. Where k is a given positive integer. For example, if the given linked list is 10->20->30->40-...
Longest Subarray having sum of elements atmost ‘k’	25 May, 2022 Given an array of integers, our goal is to find the length of the largest subarray having the sum of its elements at most ‘k’ where k>0. Examples: Input : arr[] = {1, 2, 1, 0, 1, 1, 0}, k = 4 Output : 5 Explanation: {1, 2, 1} => sum = 4, length = 3 {1, 2, 1, 0}, {2, 1, 0, 1} => sum = 4, length = 4 {1, ...	[ { "code": null, "e": 54, "s": 26, "text": "\n25 May, 2022" }, { "code": null, "e": 191, "s": 54, "text": "Given an array of integers, our goal is to find the length of the largest subarray having the sum of its elements at most ‘k’ where k>0." }, { "code": null, "e": ...
Python \| Find most frequent element in a list	17 Jul, 2021 Given a list, find the most frequent element in it. If there are multiple elements that appear maximum number of times, print any one of them. Examples: Input : [2, 1, 2, 2, 1, 3] Output : 2 Input : ['Dog', 'Cat', 'Dog'] Output : Dog Approach #1 : Naive ApproachThis is a brute force approach in which we ...	[ { "code": null, "e": 52, "s": 24, "text": "\n17 Jul, 2021" }, { "code": null, "e": 195, "s": 52, "text": "Given a list, find the most frequent element in it. If there are multiple elements that appear maximum number of times, print any one of them." }, { "code": null, ...
PHP array_key_exists() Function	01 Dec, 2021 In this article, we will see how to get the array key using the array_key_exists() function in PHP, & will also see its implementation through the example. The array_key_exists() is an inbuilt function of PHP that is used to check whether a specific key or index is present inside an array or not. The funct...	[ { "code": null, "e": 28, "s": 0, "text": "\n01 Dec, 2021" }, { "code": null, "e": 591, "s": 28, "text": "In this article, we will see how to get the array key using the array_key_exists() function in PHP, & will also see its implementation through the example. The array_key_exist...
How to standardized a column of R DataFrame ?	05 Apr, 2021 A large dataset that had multiple columns with varying ranges and units may need to be standardized before further processing. In this article, we will be discussing how to standardize a column of dataframe in R Programming Language. Let’s first discuss standardization. Standardization is a feature scaling...	[ { "code": null, "e": 28, "s": 0, "text": "\n05 Apr, 2021" }, { "code": null, "e": 262, "s": 28, "text": "A large dataset that had multiple columns with varying ranges and units may need to be standardized before further processing. In this article, we will be discussing how to st...
What is Vagrant?	09 Jun, 2021 Vagrant is an open-source tool that helps us to automate the creation and management of Virtual Machines. In a nutshell, we can specify the configuration of a virtual machine in a simple configuration file, and Vagrant creates the same Virtual machine using just one simple command. It provides command-line...	[ { "code": null, "e": 28, "s": 0, "text": "\n09 Jun, 2021" }, { "code": null, "e": 372, "s": 28, "text": "Vagrant is an open-source tool that helps us to automate the creation and management of Virtual Machines. In a nutshell, we can specify the configuration of a virtual machine ...
How to Improve Performance of PC/Laptop?	21 Aug, 2021 More often than not people encounter performance issues with their personal computer after a significant time. These can occur due to various issues. Some key factors and their resolution is given in this article. Follow the below steps to delete all temporary files: Click on the start button and type “RUN...	[ { "code": null, "e": 28, "s": 0, "text": "\n21 Aug, 2021" }, { "code": null, "e": 242, "s": 28, "text": "More often than not people encounter performance issues with their personal computer after a significant time. These can occur due to various issues. Some key factors and thei...
How to Resize JPEG Image in PHP ?	27 May, 2020 Why do we need to resize images?In a website, often, we need to scale an image to fit a particular section. Sometimes, it becomes necessary to scale down any image of random size to fit a cover photo section or profile picture section. Also, we need to show a thumbnail of a bigger image. In those cases, it...	[ { "code": null, "e": 28, "s": 0, "text": "\n27 May, 2020" }, { "code": null, "e": 388, "s": 28, "text": "Why do we need to resize images?In a website, often, we need to scale an image to fit a particular section. Sometimes, it becomes necessary to scale down any image of random s...
tidyr Package in R Programming	06 Aug, 2020 Packages in the R language are a collection of R functions, compiled code, and sample data. They are stored under a directory called “library” in the R environment. By default, R installs a set of packages during installation. One of the most important packages in R is the tidyr package. The sole purpose ...	[ { "code": null, "e": 28, "s": 0, "text": "\n06 Aug, 2020" }, { "code": null, "e": 647, "s": 28, "text": "Packages in the R language are a collection of R functions, compiled code, and sample data. They are stored under a directory called “library” in the R environment. By default...
Project Idea \| God’s Eye	11 May, 2022 Project Idea: Complete user’s Activities tracking with Remote Assistance This Program is divided into two major modules one is for complete activity tracking and can even tell which activity is currently active on the user’s side. Can also work as a Global Keylogger to log the text written by a user on any...	[ { "code": null, "e": 52, "s": 24, "text": "\n11 May, 2022" }, { "code": null, "e": 696, "s": 52, "text": "Project Idea: Complete user’s Activities tracking with Remote Assistance This Program is divided into two major modules one is for complete activity tracking and can even tel...
Python Program for Program to calculate area of a Tetrahedron	16 Jun, 2022 A Tetrahedron is simply a pyramid with a triangular base. It is a solid object with four triangular faces, three on the sides or lateral faces, one on the bottom or the base and four vertices or corners. If the faces are all congruent equilateral triangles, then the tetrahedron is called regular. The volum...	[ { "code": null, "e": 53, "s": 25, "text": "\n16 Jun, 2022" }, { "code": null, "e": 427, "s": 53, "text": "A Tetrahedron is simply a pyramid with a triangular base. It is a solid object with four triangular faces, three on the sides or lateral faces, one on the bottom or the base ...
C++ default constructor \| Built-in types - GeeksforGeeks	29 May, 2017 Predict the output of following program? #include <iostream>using namespace std; int main() { cout << int() << endl; return 0;} A constructor without any arguments or with default values for every argument, is treated as default constructor. It will be called by the compiler when in need (precisely ...	[ { "code": null, "e": 24620, "s": 24592, "text": "\n29 May, 2017" }, { "code": null, "e": 24661, "s": 24620, "text": "Predict the output of following program?" }, { "code": "#include <iostream>using namespace std; int main() { cout << int() << endl; return 0;}", ...
Design Pattern - Abstract Factory Pattern	Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object. In Abstract Factory pattern an interface is responsible ...	[ { "code": null, "e": 3015, "s": 2751, "text": "Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create ...
Find K Closest Points to the Origin in C++	Suppose we have a set of points. Our task is to find K points which are closest to the origin. Suppose the points are (3, 3), (5, -1) and (-2, 4). Then the closest two (K = 2) points are (3, 3), (-2, 4). To solve this problem, we will sort the list of points based on their Euclidean distance, after that take the top mo...	[ { "code": null, "e": 1266, "s": 1062, "text": "Suppose we have a set of points. Our task is to find K points which are closest to the origin. Suppose the points are (3, 3), (5, -1) and (-2, 4). Then the closest two (K = 2) points are (3, 3), (-2, 4)." }, { "code": null, "e": 1450, "s...
Program to find root of an equations using secant method - GeeksforGeeks	08 Oct, 2021 The secant method is used to find the root of an equation f(x) = 0. It is started from two distinct estimates x1 and x2 for the root. It is an iterative procedure involving linear interpolation to a root. The iteration stops if the difference between two intermediate values is less than the convergence fac...	[ { "code": null, "e": 24880, "s": 24852, "text": "\n08 Oct, 2021" }, { "code": null, "e": 25192, "s": 24880, "text": "The secant method is used to find the root of an equation f(x) = 0. It is started from two distinct estimates x1 and x2 for the root. It is an iterative procedure ...
C++ program to find two numbers with sum and product both same as N	In this tutorial, we will be discussing a program to find two numbers (say ‘a’ and ‘b’) such that both a+b = N and a*b = N are satisfied. Eliminating ‘a’ from both the equations, we get a quadratic equation in ‘b’ and ‘N’ i.e b2 - bN + N = 0 This equation will have two roots which will give us the value of both ‘a’ and...	[ { "code": null, "e": 1165, "s": 1062, "text": "In this tutorial, we will be discussing a program to find two numbers (say ‘a’ and ‘b’) such that both" }, { "code": null, "e": 1200, "s": 1165, "text": "a+b = N and a*b = N are satisfied." }, { "code": null, "e": 1288, ...
Copy char array to string in Java	Use the valueOf() method in Java to copy char array to string. You can also use the copyValueOf() method, which represents the character sequence in the array specified. Here, you can specify the part of array to be copied. Let us first create a character array. char[] arr = { 'p', 'q', 'r', 's' }; The method valueOf()...	[ { "code": null, "e": 1286, "s": 1062, "text": "Use the valueOf() method in Java to copy char array to string. You can also use the copyValueOf() method, which represents the character sequence in the array specified. Here, you can specify the part of array to be copied." }, { "code": null, ...
How to extract a single column of an R data frame as a data frame?	Generally, we extract columns as a vector from an R data frame but sometimes we might need a column as a data frame, therefore, we can use as.data.frame to extract columns that we want to extract as a data frame with single square brackets. The purpose behind this could be merging the column with another data frame. Co...	[ { "code": null, "e": 1380, "s": 1062, "text": "Generally, we extract columns as a vector from an R data frame but sometimes we might need a column as a data frame, therefore, we can use as.data.frame to extract columns that we want to extract as a data frame with single square brackets. The purpose ...
Jackson - Quick Guide	Jackson is a simple java based library to serialize java objects to JSON and vice versa. Easy to use. - jackson API provides a high level facade to simplify commonly used use cases. Easy to use. - jackson API provides a high level facade to simplify commonly used use cases. No need to create mapping. - jackson API pro...	[ { "code": null, "e": 1842, "s": 1753, "text": "Jackson is a simple java based library to serialize java objects to JSON and vice versa." }, { "code": null, "e": 1935, "s": 1842, "text": "Easy to use. - jackson API provides a high level facade to simplify commonly used use cases."...
abs() in Python	The abs() function in python represents the absolute value of a numeric input. The absolute value is concerned with the value or magnitude of a number instead of the sign attached to the number. It is even more useful for complex numbers where the calculation of magnitude involves many steps. The syntax of the function...	[ { "code": null, "e": 1356, "s": 1062, "text": "The abs() function in python represents the absolute value of a numeric input. The absolute value is concerned with the value or magnitude of a number instead of the sign attached to the number. It is even more useful for complex numbers where the calcu...
Count ways to reach the n’th stair	There are n stairs. One person will go to 1'st to the n'th stair. Maximum how many stairs he/she can cross in one step is also given. With this information, we have to find possible ways to go to the n'th stairs. Let us consider one can cross a maximum two stairs in each step. So we can find recursive relations to solv...	[ { "code": null, "e": 1275, "s": 1062, "text": "There are n stairs. One person will go to 1'st to the n'th stair. Maximum how many stairs he/she can cross in one step is also given. With this information, we have to find possible ways to go to the n'th stairs." }, { "code": null, "e": 151...