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Find value in a MongoDB Array with multiple criteria?	To find value in the array with multiple criteria, for example, you can use elemMatchalongwithgt and $lt. The syntax is as follows − db.yourCollectionName.find({yourFieldName:{$elemMatch:{$gt:yourNegativeValue,$lt:yourPo sitiveValue}}}).pretty(); To understand the above syntax, let us create a collection with the docum...	[ { "code": null, "e": 1195, "s": 1062, "text": "To find value in the array with multiple criteria, for example, you can use elemMatchalongwithgt and $lt. The syntax is as follows −" }, { "code": null, "e": 1309, "s": 1195, "text": "db.yourCollectionName.find({yourFieldName:{$elemM...
How to add/append content to an existing file using Java?	In most scenarios, if you try to write content to a file, using the classes of the java.io package, the file will be overwritten i.e. data existing in the file is erased and the new data is added to it. But, in certain scenarios like logging exceptions into a file (without using logger frameworks) you need to append da...	[ { "code": null, "e": 1265, "s": 1062, "text": "In most scenarios, if you try to write content to a file, using the classes of the java.io package, the file will be overwritten i.e. data existing in the file is erased and the new data is added to it." }, { "code": null, "e": 1425, "s"...
Difference between "." and "#" selector in CSS - GeeksforGeeks	30 Jun, 2021 The dot(.) and hash(#) both of them are used as a CSS selector. Both selectors are used to select the content to set the style. CSS selectors select HTML elements according to its id, class, type, attribute, etc.Id selector(“#”): The id selector selects the id attribute of an HTML element to select a speci...	[ { "code": null, "e": 25400, "s": 25372, "text": "\n30 Jun, 2021" }, { "code": null, "e": 25890, "s": 25400, "text": "The dot(.) and hash(#) both of them are used as a CSS selector. Both selectors are used to select the content to set the style. CSS selectors select HTML elements ...
DIY: Apache Spark & Docker. Set up a Spark cluster in Docker from... \| by Shane De Silva \| Towards Data Science	Two technologies that have risen in popularity over the last few years are Apache Spark and Docker. Apache Spark provides users with a way of performing CPU intensive tasks in a distributed manner. It’s adoption has been steadily increasing in the last few years due to its speed when compared to other distributed techn...	[ { "code": null, "e": 146, "s": 46, "text": "Two technologies that have risen in popularity over the last few years are Apache Spark and Docker." }, { "code": null, "e": 545, "s": 146, "text": "Apache Spark provides users with a way of performing CPU intensive tasks in a distribut...
Understanding NLP and Topic Modeling Part 1 \| by Tony Yiu \| Towards Data Science	Natural language processing (NLP) is one of the trendier areas of data science. Its end applications are many — chatbots, recommender systems, search, virtual assistants, etc. So it would be beneficial for budding data scientists to at least understand the basics of NLP even if their career takes them in a completely d...	[ { "code": null, "e": 347, "s": 171, "text": "Natural language processing (NLP) is one of the trendier areas of data science. Its end applications are many — chatbots, recommender systems, search, virtual assistants, etc." }, { "code": null, "e": 736, "s": 347, "text": "So it woul...
Who is a Potential Customer?. Online purchasing intention prediction... \| by Pei Guo \| Towards Data Science	Every day online shopping sites receive a huge number of visits. However, only a small portion of the visits turned into purchases. What if the shopping sites know which customer groups are more likely to make purchases? They will be able to launch target promotions that benefit both the websites and the customers. Tod...	[ { "code": null, "e": 304, "s": 172, "text": "Every day online shopping sites receive a huge number of visits. However, only a small portion of the visits turned into purchases." }, { "code": null, "e": 393, "s": 304, "text": "What if the shopping sites know which customer groups ...
Create many JavaScript objects as the same type?	It is very easy to create a single object than to create multiple objects of the same type. To breach this hurdle, javascript has provided object constructor function. Using this function, initially, we have to create the type of the object and later on, we need to declare the properties of the object. In the following...	[ { "code": null, "e": 1366, "s": 1062, "text": "It is very easy to create a single object than to create multiple objects of the same type. To breach this hurdle, javascript has provided object constructor function. Using this function, initially, we have to create the type of the object and later on...
Sorting string in reverse order in JavaScript	We are required to write a JavaScript function that takes in a lowercase string and sorts it in the reverse order i.e., b should come before a, c before b and so on. For example: If the input string is − const str = "hello"; Then the output should be − const output = "ollhe"; Following is the code − const string = 'hel...	[ { "code": null, "e": 1228, "s": 1062, "text": "We are required to write a JavaScript function that takes in a lowercase string and sorts it in the reverse order i.e., b should come before a, c before b and so on." }, { "code": null, "e": 1266, "s": 1228, "text": "For example: If ...
How to get selected text from a drop-down list using jQuery? - GeeksforGeeks	03 Aug, 2021 We can select text or we can also find the position of a text in a drop down list using option:selected attribute or by using val() method in jQuery. By using val() method :The val() method is an inbuilt method in jQuery which is used to return or set the value of attributes for the selected elements. Synt...	[ { "code": null, "e": 24864, "s": 24836, "text": "\n03 Aug, 2021" }, { "code": null, "e": 25014, "s": 24864, "text": "We can select text or we can also find the position of a text in a drop down list using option:selected attribute or by using val() method in jQuery." }, { ...
Artefact Correction with ICA. Illustrated with an example from the... \| by Thomas A Dorfer \| Towards Data Science	Time-series data is often contaminated with unwanted signal artefacts that have the potential to considerably distort any further analysis. Independent component analysis, or ICA, is a powerful method to get around this very problem. Here, I will give a brief introduction to ICA followed by a demonstration of how to im...	[ { "code": null, "e": 741, "s": 171, "text": "Time-series data is often contaminated with unwanted signal artefacts that have the potential to considerably distort any further analysis. Independent component analysis, or ICA, is a powerful method to get around this very problem. Here, I will give a b...
Apache Commons IO - Quick Guide	Apache Commons IO library provides various utility classes for common operations for File IO covering wide range of use cases. It helps avoid writing boilerplate code. Apache Commons IO library provides classes for following categories: Utility classes − These classes under org.apache.commons.io package provides file a...	[ { "code": null, "e": 2641, "s": 2404, "text": "Apache Commons IO library provides various utility classes for common operations for File IO covering wide range of use cases. It helps avoid writing boilerplate code. Apache Commons IO library provides classes for following categories:" }, { "c...
Material Design Buttons in Android with Example - GeeksforGeeks	02 Sep, 2020 Material Design Components (MDC Android) offers designers and developers a way to implement Material Design in their Android application. Developed by a core team of engineers and UX designers at Google, these components enable a reliable development workflow to build beautiful and functional Android appli...	[ { "code": null, "e": 25095, "s": 25067, "text": "\n02 Sep, 2020" }, { "code": null, "e": 25872, "s": 25095, "text": "Material Design Components (MDC Android) offers designers and developers a way to implement Material Design in their Android application. Developed by a core team ...
This Is How Twitter Sees The World : Sentiment Analysis Part One \| by Ronald Wahome \| Towards Data Science	Twitter is an online social network with over 330 million active monthly users as of February 2018. Users on twitter create short messages called tweets to be shared with other twitter users who interact by retweeting and responding. Twitter employs a message size restriction of 280 characters or less which forces the ...	[ { "code": null, "e": 839, "s": 171, "text": "Twitter is an online social network with over 330 million active monthly users as of February 2018. Users on twitter create short messages called tweets to be shared with other twitter users who interact by retweeting and responding. Twitter employs a mes...
Difference Between ordinal() and compareTo() in Java Enum - GeeksforGeeks	02 Feb, 2021 Enumerations serve the purpose of representing a group of named constants in a programming language. If we want to represent a group named constant then we should go for Enum. Every enum constant is static. Hence, we can access it by using enum Name. Example: enum Day{ SUNDAY, MONDAY, TUESDAY, WEDNESDAY,...	[ { "code": null, "e": 24778, "s": 24750, "text": "\n02 Feb, 2021" }, { "code": null, "e": 25029, "s": 24778, "text": "Enumerations serve the purpose of representing a group of named constants in a programming language. If we want to represent a group named constant then we should ...
Spreadsheets to Python : Monitoring Covid Made Easy, Using Code \| by Clive Siviour \| Towards Data Science	The massive availability of data on the internet gives us an unprecedented opportunity to explore the underlying numbers behind different phenomena and events. Often these data are updated as time goes on, and we want to take advantage of this by updating our analysis. For me, one of the most important reasons to move ...	[ { "code": null, "e": 556, "s": 165, "text": "The massive availability of data on the internet gives us an unprecedented opportunity to explore the underlying numbers behind different phenomena and events. Often these data are updated as time goes on, and we want to take advantage of this by updating...
C# Enum GetName Method	The GetName() method returns the names of the constants in the Enumeration. Here is the enum. enum Stock { Appliance, Clothing, Footwear }; Now, get the names using the Enum.GetName() method. Just set the constant and retrieve the individual name. Enum.GetName(typeof(Stock), 1 Let us see the example now. Live Demo usi...	[ { "code": null, "e": 1138, "s": 1062, "text": "The GetName() method returns the names of the constants in the Enumeration." }, { "code": null, "e": 1156, "s": 1138, "text": "Here is the enum." }, { "code": null, "e": 1202, "s": 1156, "text": "enum Stock { Appl...
Batch Script - SYSTEMINFO	This batch command shows configuration of a computer and its operating system. systeminfo @echo off systeminfo The above command will show the system information on the current system. Following is a subset of the output. Host Name: WIN-50GP30FGO75 OS Name: Microsoft Windows Server 201...	[ { "code": null, "e": 2248, "s": 2169, "text": "This batch command shows configuration of a computer and its operating system." }, { "code": null, "e": 2260, "s": 2248, "text": "systeminfo\n" }, { "code": null, "e": 2281, "s": 2260, "text": "@echo off\nsystemin...
How to Verify Tooltip using Selenium WebDriver?	We can verify the tooltip of an element using Selenium webdriver using the getAttribute method. A tooltip text is the one which gets displayed while we hover on that element. It disappears once we move the mouse away from the element. A tooltip text generally displays the title attribute value of an element. First, we ...	[ { "code": null, "e": 1237, "s": 1062, "text": "We can verify the tooltip of an element using Selenium webdriver using the getAttribute method. A tooltip text is the one which gets displayed while we hover on that element." }, { "code": null, "e": 1497, "s": 1237, "text": "It disa...
C++ Program to Implement Segmented Sieve to Generate Prime Numbers Between Given Range	This is C++ program to implement Segmented Sieve to Generate Prime Numbers Between Given Range. Segmented Sieve first uses Simple Sieve to find primes smaller than or equal to √(n). The idea of this algorithm is to divide the range [0 ... n-1] in different segments and compute primes in all segments one by one. Begin ...	[ { "code": null, "e": 1375, "s": 1062, "text": "This is C++ program to implement Segmented Sieve to Generate Prime Numbers Between Given Range. Segmented Sieve first uses Simple Sieve to find primes smaller than or equal to √(n). The idea of this algorithm is to divide the range [0 ... n-1] in differ...
Similarity Measures — Scoring Textual Articles \| by Saif Ali Kheraj \| Towards Data Science	Many real-world applications make use of similarity measures to see how two objects are related together. We can use these measures in the applications involving Computer vision and Natural Language Processing, for example, to find and map similar documents. One important use case here for the business would be to matc...	[ { "code": null, "e": 750, "s": 172, "text": "Many real-world applications make use of similarity measures to see how two objects are related together. We can use these measures in the applications involving Computer vision and Natural Language Processing, for example, to find and map similar documen...
MySQL Tryit Editor v1.0	SELECT SUBSTR("SQL Tutorial", 5, 3) AS ExtractString; Edit the SQL Statement, and click "Run SQL" to see the result. This SQL-Statement is not supported in the WebSQL Database. The example still works, because it uses a modified version of SQL. Your browser does not support WebSQL. Your are now using a light...	[ { "code": null, "e": 54, "s": 0, "text": "SELECT SUBSTR(\"SQL Tutorial\", 5, 3) AS ExtractString;" }, { "code": null, "e": 56, "s": 54, "text": "" }, { "code": null, "e": 128, "s": 65, "text": "Edit the SQL Statement, and click \"Run SQL\" to see the result."...
The debugger statement in JavaScript	The debugger statement in JavaScript is used for setting a breakpoint in the code. The code stops execution as soon as it encounters the debugger statement and calls the debugger function (if available). Following is the code to implement debugger statement in JavaScript − Live Demo <!DOCTYPE html> <html lang="en"> <h...	[ { "code": null, "e": 1266, "s": 1062, "text": "The debugger statement in JavaScript is used for setting a breakpoint in the code. The code\nstops execution as soon as it encounters the debugger statement and calls the debugger function (if available)." }, { "code": null, "e": 1336, "...
Arithmetic Operators in VBScript	Following table shows all the arithmetic operators supported by VBScript language. Assume variable A holds 5 and variable B holds 10, then − Try the following example to understand all the arithmetic operators available in VBScript − <!DOCTYPE html> <html> <body> <script language = "vbscript" type = "text/vbsc...	[ { "code": null, "e": 2221, "s": 2080, "text": "Following table shows all the arithmetic operators supported by VBScript language. Assume variable A holds 5 and variable B holds 10, then −" }, { "code": null, "e": 2314, "s": 2221, "text": "Try the following example to understand a...
Sum of the series 2 + (2+4) + (2+4+6) + (2+4+6+8) + ... + (2+4+6+8+...+2n) in C++	In this problem, we are given a number n which defines the nth term of the series 2 + (2+4) + (2+4+6) + (2+4+6+8) + ... + (2+4+6+8+...+2n). Our task is to create a program to find the sum of the series. Input n = 3 Output Explanation − sum = (2) + (2+4) + (2+4+6) = 2 + 6 + 12 = 20 A simple solution to the problem is t...	[ { "code": null, "e": 1265, "s": 1062, "text": "In this problem, we are given a number n which defines the nth term of the series 2 + (2+4) + (2+4+6) + (2+4+6+8) + ... + (2+4+6+8+...+2n). Our task is to create a program to find the sum of the series." }, { "code": null, "e": 1272, "s"...
Database Testing - Quick Guide	Database testing includes performing data validity, data integrity testing, performance check related to database and testing of procedures, triggers and functions in the database. Consider an application that captures the day-to-day transaction details for users and stores the details in the database. From database te...	[ { "code": null, "e": 2251, "s": 2070, "text": "Database testing includes performing data validity, data integrity testing, performance check related to database and testing of procedures, triggers and functions in the database." }, { "code": null, "e": 2454, "s": 2251, "text": "C...
Eigenvector Computation and Low-Rank Approximations - GeeksforGeeks	30 May, 2021 Prerequisites: Eigen Values and Eigen Vectors Before getting into the in-depth math behind computations involved with Eigenvectors, let us briefly discuss what an eigenvalue and eigenvector actually are. The word ‘eigen’ means ‘characteristics‘. In general terms, the eigenvalues and eigenvectors give the c...	[ { "code": null, "e": 24344, "s": 24316, "text": "\n30 May, 2021" }, { "code": null, "e": 24390, "s": 24344, "text": "Prerequisites: Eigen Values and Eigen Vectors" }, { "code": null, "e": 24548, "s": 24390, "text": "Before getting into the in-depth math behind...
What's the difference between "update" and "update_idletasks" in Tkinter?	Update method processes all the pending idle tasks, unvisited events, calling functions, and callbacks. The method is applicable for updating and processing all the events or tasks such as redrawing widgets, geometry management, configuring the widget property, etc. It also ensures that if the application has any pendi...	[ { "code": null, "e": 1329, "s": 1062, "text": "Update method processes all the pending idle tasks, unvisited events, calling functions, and callbacks. The method is applicable for updating and processing all the events or tasks such as redrawing widgets, geometry management, configuring the widget p...
Deploying your Dash App to Heroku — THE MAGICAL GUIDE \| Towards Data Science	So you have your Dash app running on your local machine and you’re finally ready to share it with the world on a public site. The problem is: words like like Git, Flask, Gunicorn and Heroku sound like strange mythical creatures, even after a few drinks. Worry not: having just been through the process of deploying Dash ...	[ { "code": null, "e": 298, "s": 172, "text": "So you have your Dash app running on your local machine and you’re finally ready to share it with the world on a public site." }, { "code": null, "e": 729, "s": 298, "text": "The problem is: words like like Git, Flask, Gunicorn and Her...
How to draw a circle in OpenCV using C++?	A circle has a center and a radius. To draw a circle using OpenCV, we have to define the center and the radius. In OpenCV we have to include <imgproc.hpp> header because 'circle()' function is defined in this header. The basic syntax of this method is as follows − circle(whiteMatrix, center,radius, line_Color, thicknes...	[ { "code": null, "e": 1279, "s": 1062, "text": "A circle has a center and a radius. To draw a circle using OpenCV, we have to define the center and the radius. In OpenCV we have to include <imgproc.hpp> header because 'circle()' function is defined in this header." }, { "code": null, "e":...
Data Visualization: Say it with Charts in Python \| by Angel Das \| Towards Data Science	Business Intelligence, BI is a concept that usually involves the delivery and integration of appropriate and valuable business information in an organization. Companies use BI to detect significant events like gaining insights into customer behavior, monitoring key performance indicators over time and gaining market an...	[ { "code": null, "e": 784, "s": 171, "text": "Business Intelligence, BI is a concept that usually involves the delivery and integration of appropriate and valuable business information in an organization. Companies use BI to detect significant events like gaining insights into customer behavior, moni...
Java - Numbers Class	Normally, when we work with Numbers, we use primitive data types such as byte, int, long, double, etc. int i = 5000; float gpa = 13.65f; double mask = 125; However, in development, we come across situations where we need to use objects instead of primitive data types. In order to achieve this, Java provides wrapper cla...	[ { "code": null, "e": 2480, "s": 2377, "text": "Normally, when we work with Numbers, we use primitive data types such as byte, int, long, double, etc." }, { "code": null, "e": 2533, "s": 2480, "text": "int i = 5000;\nfloat gpa = 13.65f;\ndouble mask = 125;" }, { "code": nu...
Python - Find the length of the last word in a string	When it is required to find the length of the last word in a string, a method is defined that removes the extra empty spaces in a string, and iterates through the string. It iterates until the last word has been found. Then, its length is found and returned as output. Below is a demonstration of the same def last_word_...	[ { "code": null, "e": 1331, "s": 1062, "text": "When it is required to find the length of the last word in a string, a method is defined that removes the extra empty spaces in a string, and iterates through the string. It iterates until the last word has been found. Then, its length is found and retu...
Reverse a String \| Practice \| GeeksforGeeks	Given a String S , print the reverse of the string as output. Example 1: Input: S = "GeeksforGeeks" Output: "skeeGrofskeeG" Explanation: Element at first is at last and last is at first, second is at second last and second last is at second position and so on . Example 2: Input: S = "ReversE" Output: "EsreveR" Expl...	[ { "code": null, "e": 300, "s": 226, "text": "Given a String S , print the reverse of the string as output.\n\nExample 1:" }, { "code": null, "e": 492, "s": 300, "text": "Input: S = \"GeeksforGeeks\"\nOutput: \"skeeGrofskeeG\" \nExplanation: Element at first is at last and\nlast i...
The Depressing Challenges Facing The Julia Programming Language In 2021 \| by Emmett Boudreau \| Towards Data Science	The Julia programming language has been quite an object of interest in the wonderful world of programming recently, and this is for good reason in my subjective opinion. There are so many things to love about Julia that simply are not existent in other languages. However, no programming language is without its issues, ...	[ { "code": null, "e": 666, "s": 172, "text": "The Julia programming language has been quite an object of interest in the wonderful world of programming recently, and this is for good reason in my subjective opinion. There are so many things to love about Julia that simply are not existent in other la...
Consul - Working with Microservices	In this chapter, we will understand how Microservices work with Consul. We will also learn how the following components affect Consul. Using docker Building Registrator for Service Discovery Using rkt and Nomad Let us now discuss each of these in detail. Before starting, please do not use this setup in production as it...	[ { "code": null, "e": 1937, "s": 1802, "text": "In this chapter, we will understand how Microservices work with Consul. We will also learn how the following components affect Consul." }, { "code": null, "e": 1950, "s": 1937, "text": "Using docker" }, { "code": null, "e...
Visualizing 3D Seismic Volumes Made Easy with Python and Mayavi \| by Ahmad Mustafa \| Towards Data Science	Visualization of migrated, post-stack seismic volumes is a very crucial component of interpretation workflows, be it to pick salt domes, interpret horizons, identify fault planes, or classify rock facies. While there are already professional tools like OpendTect and Petrel available to experienced seismic interpreters,...	[ { "code": null, "e": 252, "s": 47, "text": "Visualization of migrated, post-stack seismic volumes is a very crucial component of interpretation workflows, be it to pick salt domes, interpret horizons, identify fault planes, or classify rock facies." }, { "code": null, "e": 981, "s": ...
iText - Link Annotation	In this chapter, we will see how to add link annotation to a PDF document using iText library. You can create an empty PDF Document by instantiating the Document class. While instantiating this class, you need to pass a PdfDocument object as a parameter to its constructor. To use text annotation in your PDF document, y...	[ { "code": null, "e": 2463, "s": 2368, "text": "In this chapter, we will see how to add link annotation to a PDF document using iText library." }, { "code": null, "e": 2642, "s": 2463, "text": "You can create an empty PDF Document by instantiating the Document class. While instant...
Collection Interface in Java with Examples - GeeksforGeeks	07 Aug, 2021 The Collection interface is a member of the Java Collections Framework. It is a part of java.util package. It is one of the root interfaces of the Collection Hierarchy. The Collection interface is not directly implemented by any class. However, it is implemented indirectly via its subtypes or subinterfaces...	[ { "code": null, "e": 23974, "s": 23946, "text": "\n07 Aug, 2021" }, { "code": null, "e": 24310, "s": 23974, "text": "The Collection interface is a member of the Java Collections Framework. It is a part of java.util package. It is one of the root interfaces of the Collection Hiera...
Yii - Using Cookies	Cookies allow data to be persisted across requests. In PHP, you may access them through the $_COOKIE variable. Yii represents cookie as an object of the yii\web\Cookie class. In this chapter, we describe several methods for reading cookies. Step 1 − Create an actionReadCookies method in the SiteController. public funct...	[ { "code": null, "e": 3074, "s": 2833, "text": "Cookies allow data to be persisted across requests. In PHP, you may access them through the $_COOKIE variable. Yii represents cookie as an object of the yii\\web\\Cookie class. In this chapter, we describe several methods for reading cookies." }, { ...
Find the foot of perpendicular of a point in a 3 D plane - GeeksforGeeks	11 May, 2021 Given a point (x1, y1, z1) in 3-D and coefficients of the equation of plane, we have to find the foot of perpendicular of a point in a 3 D plane.Examples: Input: a = 1, b = -2, c = 0, d = 0, x = -1, y = 3, z = 4 Output: x2 = 0.4 y2 = 0.2 z2 = 4.0Input: a = 2, b = -1, c = 1, d = 3, x = 1, y = 3, z = 4 Out...	[ { "code": null, "e": 25070, "s": 25042, "text": "\n11 May, 2021" }, { "code": null, "e": 25227, "s": 25070, "text": "Given a point (x1, y1, z1) in 3-D and coefficients of the equation of plane, we have to find the foot of perpendicular of a point in a 3 D plane.Examples: " }, ...