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I am new to react and i ran into this problem which I am trying to this problem, map function is not rendering all the elements of the array, it only renders first element of the array, but it renders when i refresh once. I would really appreciate if you find the problem over here. Or tell me the better option to fetch and render the data

Hi guys i am new to react js and It keeps on saying TypeError: Cannot read property 'map' of undefined in react.js, even tho its not undefined.

I was creating a BottomSheetDialogFragment, in bottom sheet dialog frament i placed a gridview inside the Scroll view and i want to display Some Images in my gridview, for that first i planned to save images(manually) in firebase and i planned to show those images in Gridview but unfortunately i dont know how to do and i refer some tutorials which also not helps me

So i planned to save images in drawable folder and i wish to dispaly in the Gridview, after i saved the images in drawable folder and i can get those images names in my code like R.drawable.music-box.png

this music-box was not showing when i type R.drawable. what is the problem pls help me also if posible pls say

how to save images manually in firebase and display in gridvirew in bottomsheetdialogframents

thanks .

I needed to make a simple thing and it seemed like a good starter project to learn python. I followed this GPIO music box tutorial (https://projects.raspberrypi.org/en/projects/gpio-music-box) and it runs fine in MU, Thonny Python IDE, but when I run on Geany it will open in a terminal, run end, produce no sound on button push. What I need is for this script to start automatically once raspbian is booted up and play back sounds at start. I've tried editing rc.local, bashrc, and crontab for automatic startup.

So this is running on a pi3 and the script looks like this basically:

I'm trying to build an audio player using HTML, CSS and Jquery. I'm having trouble with the 'hover' method using Jquery. It seems to move the div down when the 'background-image' is removed - why is this? I understand that has to do with the flow of the page. Thinking I should start the audio player again from scratch as there is too much wrong with it. Should I just use CSS hover?

Here is a link to the live site

I am just trying to do this really simple thing where I want to play two different sound files depending on a touch sensor. The problem that I currently have is that although the sensor works, the programm won't change the audio file... So, I am clueless right now, any help? Thanks in advance, Lola