Tag: between
Differences between a pointer and reference
Differences Between Pointer and Reference in C++ are as follows, 1.) Reference is a kind of const pointer that de-reference itself automatically. Yes, its similar to const pointer therefore once you have attached a reference to a variable or object then you cannot make it to point to someone else. Advertisements Now if you try to …
Difference between delete & []delete and rise of Memory Leaks
In this article we will discuss the difference between delete &Â []delete and how mixing new [] with delete can give rise to Memory Leaks. To allocate memory dynamically on heap we use new[] operator i.e. Advertisements class Sample; Sample * ptrArr = new Sample[5]; Here new[] performs following operations internally, In first step, it …
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Difference between lvalue and rvalue in C++
In this article we will discuss the differences between lvalue and rvalue in C++. In C, definition if lvalue and rvalue was somewhat simple, anything i.e. left of assignment operator is lvalue and  right ofassignment operator is rvalue. But in C++ this definition has changed and become more interesting. Every Expression in C++ is either rvalue or …
Difference between Vector and List in C++
In this article we will discuss the differences between std::vector and std::list in C++. Both vector and list are sequential containers of C++ Standard Template Library. But there are many differences between them because of their internal implementation i.e. Advertisements List stores elements at non contiguous memory location i.e. it internally uses a doubly linked …
Calculate Difference between 2 Dates in C++ using Boost Library
In this article we will discuss how to calculate difference between two dates and how to iterate over a date range using C++ Boost Date Time Library. date_duration Boost Date Time Library provides a duration type to represent the duration between two dates i.e. Advertisements boost::gregorian::date_duration With this date_duration object we can get the duration …
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Compare & get differences between two lists in Python
In this article we will discuss 10 different ways to compare two lists and get their differences i.e. elements which are present in one list but not in another. Suppose we have two lists, Advertisements first_list = [10, 11, 12, 13, 14, 16, 15] sec_list = [10, 11, 12, 18, 19, 16] Now there might …
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Difference between JOIN and UNION
In this article, we will be discussing the differences between JOIN and UNION including examples of how to use them. Table of Contents Introduction Basic differences between JOIN and UNION Examples of JOIN and UNION Introduction JOIN is used to retrieve data from multiple tables. Data retrieved from JOINs are horizontally aligned. A JOIN is …
MySQL WHERE DATE BETWEEN
This article will be looking into how to use BETWEEN operator with dates in MySQL select where statements. We will be going through a few examples to demonstrate the concept. Table of Contents: Select data between two dates in MySQL MySQL select data between two today and 7 days MySQL select where date between two …
Python: Get difference between two dates in years
In this article, we will discuss how to get the difference between two dates in years in python. In python, the dateutil module provides a class relativedelta, which represents an interval of time. The relativedelta class has following attributes which tells about the duration, Year Month Day Hours Minutes Seconds Microseconds So, to calculate the …
Python: Get difference between two dates in days
In this article, we will discuss how to get the difference between two dates in days in python. Python provides a module datetime for manipulation of date and time. It consists of following classes, datetime.date : An object of date class specifies a date using year, month and day datetime.time : An object of time …