# Calculate time difference between records where the value changes KDB+/q

Advertisements I have a table like the below, with timestamps and values. show t:([]time:2022.10.10D12:30:00.100000000 2022.10.10D12:30:00.200000000 2022.10.10D12:30:00.300000000 2022.10.10D12:30:00.400000000 2022.10.10D12:30:00.500000000 2022.10.10D12:30:00.600000000;values: 1 1 1 2 2 3;duration: 300 200 100 200 100 0N) time values duration ——————————————— 2022.10.10D12:30:00.100000000 1 300 2022.10.10D12:30:00.200000000 1 200 2022.10.10D12:30:00.300000000 1 100 2022.10.10D12:30:00.400000000 2 200 2022.10.10D12:30:00.500000000 2 100 2022.10.10D12:30:00.600000000 3 The third column,… Read More Calculate time difference between records where the value changes KDB+/q

# Subtracting time duration from a timestamp in R

Advertisements I have a data frame as follows with a Session end time (%D/%M/%Y %H:%M:%S) and Session Duration (%M:%S). I want to obtain the Session start time in the format %D/%M/%Y %H:%M, by subtracting the Session Duration from the Session End time and attaching it to the data frame as a separate column called "SessionEnd".… Read More Subtracting time duration from a timestamp in R

# How do I set "Audio" above "Diameter 18mm"

Advertisements Here is my project https://jsfiddle.net/9rkfst5a/1/ How can I get the h1 above the ul and not next to each other? >Solution : Many ways, but simple and quick would be to just knock them out of the flow in your HTML so they’re not contained in the specs class and then set the padding… Read More How do I set "Audio" above "Diameter 18mm"

# GetX Throwing TypeError when try to build with Obx

Advertisements I have controller call MenuController class MenuController extends GetxController { var currentCategory = Rx<int>(0); @override void onReady() async { await Future.delayed(const Duration(milliseconds: 2000)); } void setMenuByIndex(int index) { currentCategory.value = index; } } And I’m trying to check selected index from simple Widget like this Obx(() => Text(controller.currentCategory.value.toString())) Getting controller like here final controller… Read More GetX Throwing TypeError when try to build with Obx

# How to return a variable from a destructor

Advertisements So I have a struct called timer which determines how much time did a block of code take to execute and complete and I’m going to run few benchmarks on my sorting algorithm and take the average value of time it took for each sorting algorithm. struct Example{ std::chrono::time_point<std::chrono::steady_clock> start, end; Example() { start… Read More How to return a variable from a destructor

# How do I animate changes one at a time in SwiftUI on a button tap?

Advertisements I have a loop where I update a value that changes the view. In this example I want the updates to happen one at a time so you see it ripple across the row, but they all happen at once. struct AnimationQuestion: View { @State var colors = "🟪🟨🟧🟦🟥🟫⬛️🟩⬜️".map { String(\$0) } @State var… Read More How do I animate changes one at a time in SwiftUI on a button tap?

# unsupported operand type(s) for -: 'DateField' and 'DateField'

Advertisements I am working on creating a contract model with Django and I came cross on how to get the time duration from the start_date to the end_date?? class Contract(models.Model): name = models.CharField(max_length=100) price = models.IntegerField(max_length=10) start_date = models.DateField(auto_now_add=True) end_date = models.DateField(auto_now_add=True) duration = models.IntegerField(end_date – start_date) # how get the duration by hours created_at… Read More unsupported operand type(s) for -: 'DateField' and 'DateField'

# React JW player how to get current duration of video?

Advertisements I am using React JW player. My component <ReactJWPlayer playerId="id" playerScript="https://content.jwplatform.com/libraries/xxxx.js&quot; playlist={{"My JSON"}} /> This is working well. I need to get the current duration of the playing video. How can I do that in reactjs? >Solution : You can access "raw" JW player by doing <ReactJWPlayer playerId="id" … let playerInstance = window.jwplayer(‘id’); To… Read More React JW player how to get current duration of video?

# Why when fading out list of materials each material fade out in another time and not all the materials fade at the same time?

Advertisements using System.Collections; using System.Collections.Generic; using System.Linq; using UnityEngine; public class FadeInOut : MonoBehaviour { List<Material> mats = new List<Material>(); private void Start() { foreach (Transform g in transform.GetComponentsInChildren<Transform>()) { if (g.GetComponent<SkinnedMeshRenderer>() != null) { var l = g.GetComponent<SkinnedMeshRenderer>().sharedMaterials.ToList(); foreach(Material mat in l) { mats.Add(mat); } } } } private void Update() { if(Input.GetKeyDown(KeyCode.G)) {… Read More Why when fading out list of materials each material fade out in another time and not all the materials fade at the same time?