How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ?

What is the difference between == and ===? How exactly does the loosely == comparison work? How exactly does the strict === comparison work? What would be some useful examples?

Which equals operator (== vs ===) should be used in JavaScript comparisons?

I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing...

Elegant ways to support equivalence ("equality") in Python classes

When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods,...

Difference between == and === in JavaScript

What is the difference between == and === in JavaScript? I have also seen != and !== operators. Are there more such operators?

Reference — What does this symbol mean in PHP?

What is this? This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this...

Invalid write size of 4 with matrix class (using valgrind)

I have a simple matrix class I've made for use with opengl (es 2.0, afaik there isn't any built in version for that particular version of opengl). It is basically nothing more than a vector which...

Is it correct to say that xvalues have identity and are movable?

According to this document: http://www.stroustrup.com/terminology.pdf l-values have identity and are not movable. pr-values are movable but don't have identity. x-values have identity and are...

What are Python's type "objects" exactly?

I'm just beginning to learn Python. I'm finding the type system a little hard to understand. I have a number of questions, but primarily and to cut a long story short; The documentation...

Which well-known OpenID providers is a new site expected to support?

I plan to develop a web application that supports OpenID Connect as a relying party, so that a user of the application can sign up and log in using the identity provider of his choice. (This is...

The `is` operator behaves unexpectedly with non-cached integers

When playing around with the Python interpreter, I stumbled upon this conflicting case regarding the is operator: If the evaluation takes place in the function it returns True, if it is done...

Returning NotImplemented from __eq__

What's the result of returning NotImplemented from __eq__ special method in python 3 (well 3.5 if it matters)? The documentation isn't clear; the only relevant text I found only vaguely refers to...

what is std::identity and how it is used?

I just want to know what is the purpose of std::identity? I could not find anything useful on web. I know how it is implemented : template <typename T> struct identity { T operator()(T x) const {...

What do the Stream reduce() requirements exactly entail?

When using the reduce() operation on a parallel stream, the OCP exam book states that there are certain principles the reduce() arguments must adhere to. Those principles are the following: The...

sybase ase deferred update mode

I could use some help regarding the optimizer choices for the below update. I expected a direct update, not a deferred update. In real live this concerns a target table containing ~5M rows being...

Retrieve cell towers information from a background service

I have been trying using TelephonyManager to get cell tower location, the Telephony manager object returns null when I close my app. After closing app, when the background service runs the...

Nifi LDAP authorization - Multiple groups in search filter through wildcards

I am trying to use a search filter for Nifi authorizer via LDAP. The problem is that the usual search filter syntax does not seem to work. I currently have nifi working with one of my groups, so...

argsort in Thrust

Is it legal to use thrust::sort_by_key like in following code? #include <thrust/device_vector.h> #include <thrust/sequence.h> #include <thrust/iterator/permutation_iterator.h> #include...

How to fix 'script returned exit code 1' when running Jenkins pipeline

I am defining a pipeline using Jenkins Blue Ocean. I'm trying to do a simple python pep8 coding convention, but if I go inside the shell and type the command directly, it runs fine. But when the...

ASP.NET Core Session Timeout

I remember we have used session.timeout in ASP.NET to change the session timeout which was 20 minutes if not changed. I tried to change the session time out in ASP.NET Core 3.1 in Startup.cs but...

Asp.Net Core Scaffolded 'Register' and 'Login' redirect not working in Azure AppService

Asp.Net Core 3.0 app. I am using Entity Framework Identity individual authentication and have scaffolded in a Login page and a Register page. I have an SQL database in Azure. When I run on...

How to work with Keda using Azure pod identity

I'm trying to use pod identity in conjunction with KEDA to access some Azure resources, Azure Service Bus & Keyvaults to be precise. I noticed the aadpodbinding should be set when deploying the...

What is reference identity in c#?

I am searching for difference between operator (==) and the Equals() Method. Many resources say that operator (==) compares reference identity. What is actually reference identity?

How to write a reduce function for a generic ArrayList<T> via streams

I am tasked to implement a custom class to mimic to properties of a Set (without using any data structures of Sets). As such, I chose to store the elements of type T into an ArrayList as a field...

Unable to build Docker images through Jenkins installed on Kubernetes

I used the following helm chart to install Jenkins https://artifacthub.io/packages/helm/jenkinsci/jenkins The problem is it does't build docker images, saying there's no docker. Docker was...

Why can't a prvalue of array type be converted to the same type using static_cast?

#include <iostream> int main(){ using type = int[2]; static_cast<type>(type{1,2}); //#1 } Clang and GCC both complain that #1 is ill-formed, and give weird diagnoses. Clang...

Trying to understand the access operator of a Matrix Multiplication in C++

I am trying to understand the access operator for a Matrix Multiplication. template<typename T> class Matrix44 { public: Matrix44() {} // The next two lines are totally confusing for...

Implementation of a function object "power" operator in Raku

In APL there is the power operator ⍣, which if applied to a function f superimposes the application of f. How to implement that operator in Raku? For example, with this definition of f: sub...

Clarifying the value categories of expressions

In 2010, Bjarne Stroustrup, the creator of C++, wrote the paper “New” Value Terminology in which he explains the value categories of expressions introduced in the C++11 standard* (lvalue,...

Does the Hack-style pipe operator |> take precedence over grouping operator ( ) in order of operations in JavaScript?

Does the Hack-style pipe operator |> take precedence over grouping operator ( ) in order of operations in JavaScript? I'm investigating tc39/proposal-pipeline-operator - for JavaScript Pipe...