What is the difference between ++i and i++?

In C, what is the difference between using ++i and i++, and which should be used in the incrementation block of a for loop?

Is there a performance difference between i++ and ++i in C?

Is there a performance difference between i++ and ++i if the resulting value is not used?

Post increment operator behavior

Possible Duplicate: Pre & post increment operator behavior in C, C++, Java, & C# Here is a test case: void foo(int i, int j) { printf("%d %d", i, j); } ... test = 0; foo(test++, test); I...

Why are these constructs using pre and post-increment undefined behavior?

#include <stdio.h> int main(void) { int i = 0; i = i++ + ++i; printf("%d\n", i); // 3 i = 1; i = (i++); printf("%d\n", i); // 2 Should be 1, no ? volatile int u = 0; u =...

Why can't I do ++i++ in C-like languages?

Half jokingly half serious : Why can't I do ++i++ in C-like languages, specifically in C#? I'd expect it to increment the value, use that in my expression, then increment again.

Incrementing in C++ - When to use x++ or ++x?

I'm currently learning C++ and I've learned about the incrementation a while ago. I know that you can use "++x" to make the incrementation before and "x++" to do it after. Still, I really don't...

Looking for: nosql (redis/mongodb) based event logging for Django

I'm looking for a flexible event logging platform to store both pre-defined (username, ip address) and non-pre-defined (can be generated as needed by any piece of code) events for Django. I'm...

++someVariable vs. someVariable++ in JavaScript

In JavaScript you can use ++ operator before (pre-increment) or after the variable name (post-increment). What, if any, are the differences between these ways of incrementing a variable?

Post-increment and Pre-increment concept?

I don't understand the concept of postfix and prefix increment or decrement. Can anyone give a better explanation?

Getting The Size of a C++ Function

I was reading this question because I'm trying to find the size of a function in a C++ program, It is hinted at that there may be a way that is platform specific. My targeted platform is...

C++: overloading ++ for both pre and post increment

Can we overload operator++ for pre-increment and post-increment? i.e. calling SampleObject++ and ++SampleObject results correctly. class CSample { public: int m_iValue; // just to...

Python post increment variable in function call

Premise: I am trying to make a bunch of buttons in Tkinter and put them in a grid layout one after the other. I don't want to hard code each grid value that way I can add more buttons later with...

K&R qsort understanding

I have a question about this part of code(in bold): /* swap: interchange v[i] and v[j] */ void swap(int v[], int i, int j) { int temp; temp = v[i]; v[i] = v[j]; v[j] = temp; } /* qsort:...

Why post increment to value of a variable by pointer variable (*variablePointer++) returns garbage value?

I'm just playing around pre/post increment/decrement in C language. In the program below, everything works fine with variable var. But increments to the pointer variable *varAddress++ return...

Surface Area Heuristic (SAH) kd-tree of triangles - flat cells

I've implemented a SAH kd-tree based upon the paper On building fast kd-Trees for Ray Tracing, and on doing that in O(N log N) by Wald and Havran. Note I haven't done their splicing and merging...

How to get the params from a saved XGBoost model

I'm trying to train a XGBoost model using the params below: xgb_params = { 'objective': 'binary:logistic', 'eval_metric': 'auc', 'lambda': 0.8, 'alpha': 0.4, 'max_depth': 10, ...

How to overload the ++ operator for a enum in C++

This is what I tried, but I see that overloading only increments the variable if I assign it to another variable. I.e, The value of the variable on which I do the increment does not increase. ...

Priority operators in C

I found this text (source: https://education.cppinstitute.org/) and I'm trying to understand the second instruction. Can you answer the question of what distinguishes these two instructions? c =...

VGG16 trained on grayscale imagenet

I have found the VGG16 network pre-trained on the (color) imagenet database (as .npy). Is there a VGG16 network pre-trained on a gray-scale version of the imagenet database available? (The usual...

Shared pre-subscribed RxJS observables

I have an observable and I need it to act like a promise, i.e. the chain should be executed once on creation and result in hot observable. Here's an example: console.log('0 ms'); var foo$ = new...

How to use the pre-copy script from the copy activity to remove records in the sink based on the change tracking table from the source?

I am trying to use change tracking to copy data incrementally from a SQL Server to an Azure SQL Database. I followed the tutorial on Microsoft Azure documentation but I ran into some problems when...

Pre increment operator in React?

I want to set state of variable as setoffsetCount(++offsetCount) or setoffsetCount(--ofsetCount) but I am not able to use this rather setoffsetCount(ofsetCount+1) setofsetCount(offsetCount-1) is...

Kafka Connect assigns same task to multiple workers

I'm using Kafka Connect in distributed mode. A strange behavior I observed multiple times now is that, after some time (can be hours, can be days), what appears to be a balancing error happens:...

gitversion mainline not correctly basing version off of mainline?

I have a branch, let's call it features/feature_1 It has 5 commits since it was branched off of master. Its "increment" strategy is set to None. If I checkout master, it is version 3.18.1 If I...

How can I use pre-trained yolov3 model and retrain train it to detect more than 80 objects

I am using yolov3 model to detect the object. And it is able to detect 80 object. But now I want to custom train existing model for 3 new classes and I don't want to loose pre-trained object. In...

flutter showing black screen in first running application

this reference couldn't solve my problem after switching flutter channel to master and upgrading flutter this problem don't resolve on my applications. how can i solve that? flutter doctor...

Why Flutter Floor DAO findAll returns entity set with null ids?

This is a Flutter project using Floor (package equivalent of Jetpack's Room). I have an entity with an auto increment id (note that this is pre null-safety code, in the answer I start now with...

Order by Gremlin (on AWS Neptune) descending puts 0 at the top

I have a Neptune Gremlin query that should order vertices by the number of times they've been saved by other users in descending order. It works perfectly for vertices where the property value is...

Incrementing a 2D array in C

I have just started learning 2D arrays in C and I came across this code where a 2D array is directly pre-incremented like this ++array. I tried to print the matrix in 3 different places(After...

Is ++map[element] well defined?

The square bracket operator in associative containers (map, unordered map) will insert an element in the map if it doesn't exist. In case the mapped value is an integer, like std::map<std::string,...