Roger Travis questions

• how to use FFT to filter a 50Hz noise from a data array?
• VS2019 - some ToolBox components greyed out
• android 3d live wallpaper - what engine to use?
• Unable to resolve target 'android-8'
• need to loop through a PHP array in JavaScript
• Making a matrix for a smuge/wobble effet ( see pictures ) in Android
• mouse cursor position in Javascript?
• Android, can I put AsyncTask in a separate class and have a callback?
• how to clone an object in android?
• how to convert Python 3 to Python 2 code? [closed]

Roger Travis answers