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string at() in C++ - GeeksforGeeks	08 Jul, 2021 std::string::at can be used to extract characters by characters from a given string. It supports two different syntaxes both having similar parameters: Syntax 1: char& string::at (size_type idx) Syntax 2: const char& string::at (size_type idx) const idx : index number Both forms return the character t...	[ { "code": null, "e": 25632, "s": 25604, "text": "\n08 Jul, 2021" }, { "code": null, "e": 25796, "s": 25632, "text": "std::string::at can be used to extract characters by characters from a given string. It supports two different syntaxes both having similar parameters: Syntax 1: ...
Detection of a specific color(blue here) using OpenCV with Python - GeeksforGeeks	31 Dec, 2021 The following code in python uses OpenCV library which is employed for image processing techniques. The program allows the detection of a specific color in a live stream video content. A video is composed of infinite frames at different time instants. We will detect the colour of every frame one by one. Th...	[ { "code": null, "e": 25995, "s": 25967, "text": "\n31 Dec, 2021" }, { "code": null, "e": 26351, "s": 25995, "text": "The following code in python uses OpenCV library which is employed for image processing techniques. The program allows the detection of a specific color in a live ...
Dealing with class imbalanced image datasets using the Focal Tversky Loss \| by Robin Vinod \| Towards Data Science	Class imbalanced datasets is a frequent problem experienced when trying to train segmentation networks. The first time I trained an image segmentation model, I was getting over 96% accuracy straight off the bat. Either I unknowingly made the biggest breakthrough since the inception of the first CNN, or there was someth...	[ { "code": null, "e": 519, "s": 171, "text": "Class imbalanced datasets is a frequent problem experienced when trying to train segmentation networks. The first time I trained an image segmentation model, I was getting over 96% accuracy straight off the bat. Either I unknowingly made the biggest break...
Perfect Square factors of a Number - GeeksforGeeks	30 May, 2021 Given an integer N, the task is to find the number of factors of N which are a perfect square. Examples: Input: N = 100 Output: 4 Explanation: There are four factors of 100 (1, 4, 25, 100) that are perfect square.Input: N = 900 Output: 8 Explanation: There are eight factors of 900 (1, 4, 9, 25, 36, 100, ...	[ { "code": null, "e": 26169, "s": 26141, "text": "\n30 May, 2021" }, { "code": null, "e": 26264, "s": 26169, "text": "Given an integer N, the task is to find the number of factors of N which are a perfect square." }, { "code": null, "e": 26276, "s": 26264, "tex...
Features of C++ 20 - GeeksforGeeks	31 Dec, 2020 C++ has a tradition of introducing new improvements and features in every 3 years in the form of a standard. With the last standard having released in 2017 as C++ 17, C++20 is going to be the latest standard. Below ere are some major features in C++ 20: C++ Concepts library 3-way comparisons Map contains R...	[ { "code": null, "e": 25665, "s": 25637, "text": "\n31 Dec, 2020" }, { "code": null, "e": 25919, "s": 25665, "text": "C++ has a tradition of introducing new improvements and features in every 3 years in the form of a standard. With the last standard having released in 2017 as C++ ...
Cross Join in LINQ - GeeksforGeeks	01 Jan, 2020 In LINQ, the cross join is a process in which the elements of two sequences are combined with each other means the element of first sequence or collection is combined with the elements of another sequence or collection without any key selection or any filtering condition and the number of elements present ...	[ { "code": null, "e": 25547, "s": 25519, "text": "\n01 Jan, 2020" }, { "code": null, "e": 26170, "s": 25547, "text": "In LINQ, the cross join is a process in which the elements of two sequences are combined with each other means the element of first sequence or collection is combi...
Sorting array of strings (or words) using Trie \| Set-2 (Handling Duplicates) - GeeksforGeeks	09 Jul, 2021 Given an array of strings, print them in alphabetical (dictionary) order. If there are duplicates in input array, we need to print all the occurrences.Examples: Input : arr[] = { "abc", "xyz", "abcd", "bcd", "abc" } Output : abc abc abcd bcd xyz Input : arr[] = { "geeks", "for", "geeks", "a", "portal", ...	[ { "code": null, "e": 25733, "s": 25705, "text": "\n09 Jul, 2021" }, { "code": null, "e": 25896, "s": 25733, "text": "Given an array of strings, print them in alphabetical (dictionary) order. If there are duplicates in input array, we need to print all the occurrences.Examples: "...
Building a custom tf.data pipeline for object detection \| by Florian Hermisch \| Towards Data Science	Building an efficient input pipeline is an important performance optimization for training deep neural networks. Beside this, data provisioning needs even to be well structured and transparent do be ruled out as a source of errors for your training. While a lot of current developments are running on PyTorch — Tensorflo...	[ { "code": null, "e": 948, "s": 171, "text": "Building an efficient input pipeline is an important performance optimization for training deep neural networks. Beside this, data provisioning needs even to be well structured and transparent do be ruled out as a source of errors for your training. While...
The Battle of Interactive Geographic Visualization Part 1 — Interactive Geoplot Using One Line of Code \| by Francis Adrian Viernes \| Towards Data Science	Geospatial data is probably one of the most complex forms of data that currently exists. For one reason, this form of data is not used in the usual conversations between analysts. For example, analysts do not usually talk about latitude and longitude, and/or, shapefiles. For another reason, the pattern exhibited by geo...	[ { "code": null, "e": 443, "s": 171, "text": "Geospatial data is probably one of the most complex forms of data that currently exists. For one reason, this form of data is not used in the usual conversations between analysts. For example, analysts do not usually talk about latitude and longitude, and...
JavaScript program to merge two objects into a single object and adds the values for same keys	We have to write a function that takes in two objects, merges them into a single object, and adds the values for same keys. This has to be done in linear time and constant space, means using at most only one loop and merging the properties in the pre-existing objects and not creating any new variable. So, let’s write t...	[ { "code": null, "e": 1365, "s": 1062, "text": "We have to write a function that takes in two objects, merges them into a single object, and adds the values for same keys. This has to be done in linear time and constant space, means using at most only one loop and merging the properties in the pre-ex...
How to pass a value in where clause on PreparedStatement using JDBC?	To execute a statement with Where clause using PreparedStatement. Prepare the query by replacing the value in the clause with place holder “?” and, pass this query as a parameter to the prepareStatement() method. String query = "SELECT * FROM mobile_sales WHERE unit_sale >= ?"; //Creating the PreparedStatement object P...	[ { "code": null, "e": 1275, "s": 1062, "text": "To execute a statement with Where clause using PreparedStatement. Prepare the query by replacing the value in the clause with place holder “?” and, pass this query as a parameter to the prepareStatement() method." }, { "code": null, "e": 143...
How to Convert Pandas Dataframe to Keras RNN and Back to Pandas for Multivariate Regression Problems \| by Ran Pelta \| Towards Data Science	The problem I encountered was rather common (I think): Taking data in a pandas dataframe format and making predictions using a time series regression model with keras RNN where I have more than one independent X (AKA features or predictors) and one dependent y. To be more precise, the problem was not to build the model...	[ { "code": null, "e": 677, "s": 172, "text": "The problem I encountered was rather common (I think): Taking data in a pandas dataframe format and making predictions using a time series regression model with keras RNN where I have more than one independent X (AKA features or predictors) and one depend...
What are static member functions in C#?	Static functions can access only static variables. The static functions exist even before the object is created. Set static functions as − public static int getNum() {} The following is an example demonstrating the use of static functions − Live Demo using System; namespace Demo { class StaticVar { public st...	[ { "code": null, "e": 1175, "s": 1062, "text": "Static functions can access only static variables. The static functions exist even before the object is created." }, { "code": null, "e": 1201, "s": 1175, "text": "Set static functions as −" }, { "code": null, "e": 1231, ...
Stop Wasting Time with PyTorch Datasets! \| by Eric Hofesmann \| Towards Data Science	PyTorch is one of the most popular deep learning libraries out there. It provides one of the best balances between being easy to learn and a powerful framework for creating and training models quickly. Extensions of it like PyTorch Lightning make it even easier to write up and scale up networks. While it’s great that y...	[ { "code": null, "e": 469, "s": 172, "text": "PyTorch is one of the most popular deep learning libraries out there. It provides one of the best balances between being easy to learn and a powerful framework for creating and training models quickly. Extensions of it like PyTorch Lightning make it even ...
Get all methods of any object JavaScript	We are required to write a program (function) that takes in an object reference and returns an array of all the methods (member functions) that lives on that object.We are only required to return the methods in the array and not any other property that might have value of type other than a function. We will use the Obj...	[ { "code": null, "e": 1363, "s": 1062, "text": "We are required to write a program (function) that takes in an object reference and returns an array of all the methods (member functions) that lives on that object.We are only required to return the methods in the array and not any other property that ...
Automatically Generate Hotel Descriptions with LSTM \| by Susan Li \| Towards Data Science	In order to build a content based recommender system, I collected hotel descriptions for 152 hotels in Seattle. I was thinking of some other ways to torture this good quality clean data set. Hey! why not train my own text-generating neural network of hotel descriptions? That is, create a language model for generating n...	[ { "code": null, "e": 363, "s": 172, "text": "In order to build a content based recommender system, I collected hotel descriptions for 152 hotels in Seattle. I was thinking of some other ways to torture this good quality clean data set." }, { "code": null, "e": 604, "s": 363, "tex...
OpenCV - Gaussian Blur	In Gaussian Blur operation, the image is convolved with a Gaussian filter instead of the box filter. The Gaussian filter is a low-pass filter that removes the high-frequency components are reduced. You can perform this operation on an image using the Gaussianblur() method of the imgproc class. Following is the syntax o...	[ { "code": null, "e": 3202, "s": 3004, "text": "In Gaussian Blur operation, the image is convolved with a Gaussian filter instead of the box filter. The Gaussian filter is a low-pass filter that removes the high-frequency components are reduced." }, { "code": null, "e": 3340, "s": 320...
How to convert character to ASCII code using JavaScript ? - GeeksforGeeks	15 Sep, 2020 The purpose of this article is to get the ASCII code of any character by using JavaScript charCodeAt() method. This method is used to return the number indicating the Unicode value of the character at the specified index. Syntax: string.charCodeAt(index); Example: Below code illustrates that they can take...	[ { "code": null, "e": 25376, "s": 25348, "text": "\n15 Sep, 2020" }, { "code": null, "e": 25598, "s": 25376, "text": "The purpose of this article is to get the ASCII code of any character by using JavaScript charCodeAt() method. This method is used to return the number indicating ...
Python String split() Method	Python string method split() returns a list of all the words in the string, using str as the separator (splits on all whitespace if left unspecified), optionally limiting the number of splits to num. Following is the syntax for split() method − str.split(str="", num=string.count(str)). str − This is any delimeter, by...	[ { "code": null, "e": 2445, "s": 2244, "text": "Python string method split() returns a list of all the words in the string, using str as the separator (splits on all whitespace if left unspecified), optionally limiting the number of splits to num." }, { "code": null, "e": 2490, "s": ...
Data Structure - Circular Linked List	Circular Linked List is a variation of Linked list in which the first element points to the last element and the last element points to the first element. Both Singly Linked List and Doubly Linked List can be made into a circular linked list. In singly linked list, the next pointer of the last node points to the first ...	[ { "code": null, "e": 2823, "s": 2580, "text": "Circular Linked List is a variation of Linked list in which the first element points to the last element and the last element points to the first element. Both Singly Linked List and Doubly Linked List can be made into a circular linked list." }, { ...
F# - Functions	In F#, functions work like data types. You can declare and use a function in the same way like any other variable. Since functions can be used like any other variables, you can − Create a function, with a name and associate that name with a type. Assign it a value. Perform some calculation on that value. Pass it as a p...	[ { "code": null, "e": 2276, "s": 2161, "text": "In F#, functions work like data types. You can declare and use a function in the same way like any other variable." }, { "code": null, "e": 2340, "s": 2276, "text": "Since functions can be used like any other variables, you can −" ...
Tryit Editor v3.7	Tryit: HTML table - hover rows	[]
Why should you be careful about String concatenation (+) operator in loops using Java?	Strings are used to store a sequence of characters in Java, they are treated as objects. The String class of the java.lang package represents a String. You can create a String either by using the new keyword (like any other object) or, by assigning value to the literal (like any other primitive datatype). Public class ...	[ { "code": null, "e": 1214, "s": 1062, "text": "Strings are used to store a sequence of characters in Java, they are treated as objects. The String class of the java.lang package represents a String." }, { "code": null, "e": 1369, "s": 1214, "text": "You can create a String either...
Find the amplitude and number of waves for the given array	24 Feb, 2022 Given an array arr[] of N integers, the task is to find the amplitude and number of waves for the given array. If the array is not a wave array then print -1. Wave Array: An array is a wave array if it is continuously strictly increasing and decreasing or vice-versa. Amplitude is defined as the maximum dif...	[ { "code": null, "e": 28, "s": 0, "text": "\n24 Feb, 2022" }, { "code": null, "e": 187, "s": 28, "text": "Given an array arr[] of N integers, the task is to find the amplitude and number of waves for the given array. If the array is not a wave array then print -1." }, { "c...
Prototype Method – Python Design Patterns	12 Sep, 2021 Prototype Method is a Creational Design Pattern which aims to reduce the number of classes used for an application. It allows you to copy existing objects independent of the concrete implementation of their classes. Generally, here the object is created by copying a prototypical instance during run-time. I...	[ { "code": null, "e": 54, "s": 26, "text": "\n12 Sep, 2021" }, { "code": null, "e": 636, "s": 54, "text": "Prototype Method is a Creational Design Pattern which aims to reduce the number of classes used for an application. It allows you to copy existing objects independent of the ...
Shell Script to Check Hard Disk Revolutions Per Minute (RPM) Speed	30 Jun, 2021 RPM is an acronym for Revolution Per Minute. RPM is the number of revolutions a hard disk makes in a single minute. Normally, the higher the RPM of a disk the better it is, however with higher RPM comes higher cost. Below is a shell script to check the RPM of a hard disk. hdparm is an acronym for hard disk...	[ { "code": null, "e": 28, "s": 0, "text": "\n30 Jun, 2021" }, { "code": null, "e": 301, "s": 28, "text": "RPM is an acronym for Revolution Per Minute. RPM is the number of revolutions a hard disk makes in a single minute. Normally, the higher the RPM of a disk the better it is, ho...
Self Dual functions in Digital Logic	07 Apr, 2022 A function is said to be Self dual if and only if its dual is equivalent to the given function, i.e., if a given function is f(X, Y, Z) = (XY + YZ + ZX) then its dual is, fd(X, Y, Z) = (X + Y).(Y + Z).(Z + X) (fd = dual of the given function) = (XY + YZ + ZX), it is equivalent to the given function. So fun...	[ { "code": null, "e": 53, "s": 25, "text": "\n07 Apr, 2022" }, { "code": null, "e": 381, "s": 53, "text": "A function is said to be Self dual if and only if its dual is equivalent to the given function, i.e., if a given function is f(X, Y, Z) = (XY + YZ + ZX) then its dual is, fd(...
List all values of a certain field in MongoDB?	To get the list of all values of certain fields in MongoDB, you can use distinct(). The syntax is as follows − db.yourCollectionName.distinct( "yourFieldName"); To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows − > db.listAllValu...	[ { "code": null, "e": 1298, "s": 1187, "text": "To get the list of all values of certain fields in MongoDB, you can use distinct(). The syntax is as follows −" }, { "code": null, "e": 1348, "s": 1298, "text": "db.yourCollectionName.distinct( \"yourFieldName\");" }, { "code...
Windows 10 Toast Notifications with Python	We can create a notifier for the events that occurred in Windows using Python. This is very simple with the win10toast module. If you are familiar with the Toast in Android then understanding the Toast notifications with Python is a piece of cake. We can generate notifications whenever an event occurs as a remainder. L...	[ { "code": null, "e": 1517, "s": 1187, "text": "We can create a notifier for the events that occurred in Windows using Python. This is very simple with the win10toast module. If you are familiar with the Toast in Android then understanding the Toast notifications with Python is a piece of cake. We ca...
DateTime.FromOADate() Method in C#	28 Jan, 2019 DateTime.FromOADate(Double) Method is used to return a DateTime equivalent to the specified OLE Automation Date. Syntax: public static DateTime FromOADate (double d);Here, it takes an OLE Automation Date value. Return Value: This method returns an object that represents the same date and time as d. Excepti...	[ { "code": null, "e": 28, "s": 0, "text": "\n28 Jan, 2019" }, { "code": null, "e": 141, "s": 28, "text": "DateTime.FromOADate(Double) Method is used to return a DateTime equivalent to the specified OLE Automation Date." }, { "code": null, "e": 239, "s": 141, "t...
Python Turtle Tutorial	08 Feb, 2021 Turtle is a Python module that provides a drawing board like feature, which enables users to create pictures and shapes. Turtle is one of the most popular ways of introducing programming to kids and is part of the original LOGO programming language. The on-screen pen that is used for drawing is called the ...	[ { "code": null, "e": 54, "s": 26, "text": "\n08 Feb, 2021" }, { "code": null, "e": 304, "s": 54, "text": "Turtle is a Python module that provides a drawing board like feature, which enables users to create pictures and shapes. Turtle is one of the most popular ways of introducing...
Python \| Generate QR Code using pyqrcode module	17 May, 2020 Let’s see how to generate QR code in Python using pyqrcode module. pyqrcode module is a QR code generator. The module automates most of the building process for creating QR codes. This module attempts to follow the QR code standard as closely as possible. The terminology and the encodings used in pyqrcode ...	[ { "code": null, "e": 54, "s": 26, "text": "\n17 May, 2020" }, { "code": null, "e": 121, "s": 54, "text": "Let’s see how to generate QR code in Python using pyqrcode module." }, { "code": null, "e": 394, "s": 121, "text": "pyqrcode module is a QR code generator...
Microsoft Azure – Create Alert For Conditional Access Policy Changes	16 Dec, 2021 In this article, we will look into the process of creating an alert for Conditional Access Policy Changes. Conditional Access brings signals together, to make decisions, and enforce organizational policies. Creation of a New Conditional Access Policy,Deletion of a Conditional Access Policy,Changes to any ...	[ { "code": null, "e": 28, "s": 0, "text": "\n16 Dec, 2021" }, { "code": null, "e": 236, "s": 28, "text": "In this article, we will look into the process of creating an alert for Conditional Access Policy Changes. Conditional Access brings signals together, to make decisions, and e...
JavaScript \| Importing and Exporting Modules	14 Feb, 2019 JavaScript Modules are basically libraries which are included in the given program. They are used for connecting two JavaScript programs together to call the functions written in one program without writing the body of the functions itself in another program. Importing a library: It means include a library...	[ { "code": null, "e": 54, "s": 26, "text": "\n14 Feb, 2019" }, { "code": null, "e": 314, "s": 54, "text": "JavaScript Modules are basically libraries which are included in the given program. They are used for connecting two JavaScript programs together to call the functions writte...
Array Size in Perl	The size of an array in Perl can be determined using the scalar context on the array - the returned value will be the number of elements in the array − @array = (1,2,3); print "Size: ",scalar @array,"\n"; The value returned will always be the physical size of the array, not the number of valid elements. You can demonst...	[ { "code": null, "e": 1214, "s": 1062, "text": "The size of an array in Perl can be determined using the scalar context on the array - the returned value will be the number of elements in the array −" }, { "code": null, "e": 1267, "s": 1214, "text": "@array = (1,2,3);\nprint \"Siz...
Yii - Installation	The most straightforward way to get started with Yii2 is to use the basic application template provided by the Yii2 team. This template is also available through the Composer tool. Step 1 − Find a suitable directory in your hard drive and download the Composer PHAR (PHP archive) via the following command. curl -sS http...	[ { "code": null, "e": 3014, "s": 2833, "text": "The most straightforward way to get started with Yii2 is to use the basic application template provided by the Yii2 team. This template is also available through the Composer tool." }, { "code": null, "e": 3140, "s": 3014, "text": "S...
Make all column names lower case in MySQL with a single query	Let us first create a − mysql> create table DemoTable1 -> ( -> StudentFirstName varchar(20), -> StudentLastName varchar(20), -> StudentAge int, -> StudentCountryName varchar(20) -> ); Query OK, 0 rows affected (4.20 sec) Let us now make all column names lower case in MySQL − mysql> select concat('alte...	[ { "code": null, "e": 1086, "s": 1062, "text": "Let us first create a −" }, { "code": null, "e": 1301, "s": 1086, "text": "mysql> create table DemoTable1\n -> (\n -> StudentFirstName varchar(20),\n -> StudentLastName varchar(20),\n -> StudentAge int,\n -> StudentCountryN...
How to add the entry in the windows host file using PowerShell?	To add the content to the host file, we need to first retrieve the content using the Get-Content command and the need to set the content to the host file after adding the entry. The Code is shown below. We need to add the global entry to it. $file = "C:\Windows\System32\drivers\etc\hosts" $hostfile = Get-Content $file ...	[ { "code": null, "e": 1429, "s": 1187, "text": "To add the content to the host file, we need to first retrieve the content using the Get-Content command and the need to set the content to the host file after adding the entry. The Code is shown below. We need to add the global entry to it." }, { ...
Program to calculate area of a parallelogram	05 Apr, 2021 Given integers A and B denoting the length of sides of a parallelogram and Y that is the angle between the sides and length of diagonals D1 and D2 of the parallelogram and an angle 0 at the intersection of the diagonal, the task is to find the area of the parallelogram from the information provided. A para...	[ { "code": null, "e": 28, "s": 0, "text": "\n05 Apr, 2021" }, { "code": null, "e": 329, "s": 28, "text": "Given integers A and B denoting the length of sides of a parallelogram and Y that is the angle between the sides and length of diagonals D1 and D2 of the parallelogram and an ...
Python \| numpy.datetime64() method	05 Sep, 2019 With the help of numpy.datetime64() method, we can get the date in a numpy array in a particular format i.e year-month-day by using numpy.datetime64() method. Syntax : numpy.datetime64(date)Return : Return the date in a format ‘yyyy-mm-dd’. Example #1 :In this example we can see that by using numpy.datetim...	[ { "code": null, "e": 28, "s": 0, "text": "\n05 Sep, 2019" }, { "code": null, "e": 187, "s": 28, "text": "With the help of numpy.datetime64() method, we can get the date in a numpy array in a particular format i.e year-month-day by using numpy.datetime64() method." }, { "c...