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I am having problems with npx create-react-app involving global installs. My confusion arises because as far as I'm aware the create-react-app package is not installed on my machine.

Some Details:

I start a react project (with typescript template) as I have previously and recently done on this same machine a number of times:

npx create-react-app --template typescript .

I get this prompt from the terminal

Need to install the following packages: create-react-app Ok to proceed? (y)

I press y to confirm it's okay to proceed. (If I press n, the process terminates with the following error: npm ERR! canceled.) The terminal then displays the following message

I try to get a button that has this cool effect of the border radius changing when tapped (like in the Android 12 default calculator application) while also keeping the button's ripple effect.

What I thought would work was this:

I have an animated SVG where each starts after its previous . The first starts on click or 0s.
I have a problem with stopping the animation (without JS, only in XML). I press click, the animation starts. Before the entire animation ends I press click and trigger a new animation. However the previous animation continues to run and it messes up all s starting from 2.
I have tried different options (begin with time offsets; begin with id.end), but I haven't found a solution. Maybe someone who is more experiences with SVG than me could help me?

Here is my SVG:

I have a simple chat app using Firebase v9, with these components from parent to child in this hierarchical order: ChatSection, Chat, ChatLine, EditMessage.

I have a custom hook named useChatService holding the list of messages in state, the hook is called in ChatSection, the hook returns the messages and I pass them from ChatSection in a prop to Chat, then I loop through messages and create a ChatLine component for every message.

I can click the Edit button in front of each message, it shows the EditMessage component so I can edit the text, then when I press "Enter", the function updateMessage gets executed and updates the message in the db, but then every single ChatLine gets rerendered again, which is a problem as the list gets bigger.

EDIT 2: I've completed the code to make a working example with Firebase v9 so you can visualize the rerenders I'm talking about after every (add, edit or delete) of a message. I'm using ReactDevTools Profiler to track rerenders.

• Here is the full updated code: CodeSandbox
• Also deployed on: Netlify

ChatSection.js:

Hi some days before I updated my eclipse 2021-06 to 2021-09 and after that its code completion will not show all the methods and classes. For example if I type frame.setS, then it is showing no default proposals.

But At the same time when I type frame.setC and press ctrl+space, it is working This is the

Also in my settings everything is checked.

1. I searched the web and found many stack overflow questions and I tried the answers. But it didn't work

2. I deleted the .metedata folder and uninstalled and reinstalled eclipse for 5 times.

3. I tried installing eclipse from installer and zip.

Is this a bug or something.

I have also installed the java 17 plugin from eclipse marketplace.

In eclipse 2021-12 (4.22) which released yesterday (08-12-21), java.awt.* is not filtered out. So no problem. Also it has Java-17 support..

I'm trying to figure something out here

I have a 'sequence' to be executed via a serial port (on an RPI).

I have an supervisored PHP command in Laravel running that connects to a MQTT broker.

When I send a message to that broker, the RPI picks it up and processes it. Now, I have a moment in which I wait for user interaction. The issue here is, sometimes the user does not interact with the system and the PI keeps "waiting" for serial data. When a user presses a button, I get serial data, which I can process.

I tried to use a while (true) {} loop that reads the serial data, but it just stops suddenly. Here is some example code;

iOS 15 leads to content being hidden under the address bar when the virtual keyboard is active. A bug report can be found here. To see the problem, run the snippet in full size on an iPhone with iOS 15 with the address bar on the bottom and press the input field. Alternatively check out this codepen

How can I show the input field when the keyboard is active? I've tried setting padding to safe-area-inset-bottom with no luck.

When I search the internet for react-native optimizations / best practices (Especially for FlatLists which are often greedy), I always find the advice not to use the arrow functions ... }.

Example 1 : https://reactnative.dev/docs/optimizing-flatlist-configuration#avoid-anonymous-function-on-renderitem :

Move out the renderItem function to the outside of render function, so it won't recreate itself each time render function called. (...)

Example 2 : https://blog.codemagic.io/improve-react-native-app-performance/ :

Avoid Arrow Functions : Arrow functions are a common culprit for wasteful re-renders. Don’t use arrow functions as callbacks in your functions to render views (...)

Example 3 : https://medium.com/wix-engineering/dealing-with-performance-issues-in-react-native-b181d0012cfa :

Arrow functions is another usual suspect for wasteful re-renders. Don’t use arrow functions as callbacks (such as click/tap) in your render functions (...)

I understand that it is recommended not to use arrow function (especially in onPress button and FlatList), and to put the components outside of the render if possible.

Good practice example :

Using iOS 15.0.2 Safari, when the on-screen keyboard is dismissed, the address bar can become minimized without updating the viewport height. This results a bottom gap that cannot be removed without pressing the address bar. Are there any known workarounds to this? It's possible to get to this state without any device rotations by using nested containers, but the simplest reproducible example that I could come up with is as follows:

1. Rotate to landscape orientation
2. Focus on the text input to bring up the on-screen keyboard
3. Rotate to portraite orientation
4. Press "Done" on the on-screen keyboard