Categories
Development

Can not start erlang supervisor

Hello i am trying to start a supervisor of type one_for_one with one child and i am getting this error: A=pl:start(). {error,{badarg,[{erlang,apply,[{state,[0|1]},init,[[]]],[]}, {supervisor,init,1,[{file,”supervisor.erl”},{line,295}]}, {gen_server,init_it,2,[{file,”gen_server.erl”},{line,374}]}, {gen_server,init_it,6,[{file,”gen_server.erl”},{line,342}]}, {proc_lib,init_p_do_apply,3, [{file,”proc_lib.erl”},{line,249}]}]}} =CRASH REPORT==== 1-Mar-2020::15:28:41.090000 === crasher: pid: <0.215.0> registered_name: [] exception error: bad argument in function apply/3 called as apply({state,[0|1]},init,[[]]) in call from supervisor:init/1 (supervisor.erl, line 295) in call […]

Categories
Development

Embedding Racket static libs in macOS desktop application (Xcode project)

There was an article on the internet about embedding manually built Racket libs into an iOS application. Disregarding the fact that such a possibility is more fun than useful, I’ve followed instructions and (ta-dah) been able to create a working example (to my surprise!). Anyway, I was quite more eager to repeat a trick with […]

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Development

Can the A20 line still be masked off on Haswell and successors?

Wikipedia quotes this statement from Intel’s manual The functionality of A20M# is used primarily by older operating systems and not used by modern operating systems. On newer Intel 64 processors, A20M# may be absent. It is a phrase that it is actually in the manual nowadays but it is ambiguous: Does A20M# actually refer to […]

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Development

How do I get my timer to stop, when my 10th and last question has been answered?

The goal I am trying to achieve is to get my timer to stop when all the questions of my quiz has been answered. I have 10 total questions. I have been able to get the timer to start. But getting ot to stop on the click of submit on the 10th question is something […]

Categories
Development Linux Ubuntu

CouchDB Snap won’t move data folder

When I attempt to move a data directory for CouchDB, installed via Snap, I am getting a “user database not found” error. I’m new to snap, but have done this with bare Couch installs a couple of times, so I’m starting to be concerned that there is something about snap that I’m getting burned by. […]

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Development

maths game for website not working properly

I’m having problems getting a game to work on my website. I had made the game using sublime text. the game is aimed at providing children with a fun way to learn and should display on a website to allow children to play the game and see their score. The game should start when the […]

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Development

How to model a quantum harmonic oscillator in python

I only need help to figure out why my ground state graph for b) looks wrong, here’s the question in full: (I thought posting it in full would give context to the method I’m trying to use) (a) Consider a square potential well with ?(?)=0 in between two infinitely high walls separated by a distance […]

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CMS Development Wordpress

How do I use remove_action on an add_action that uses an array?

This is a messy question I’m running into a conflict between plugins and need to disable one (WP Bakery) on the front end of certain pages. I’m looking at multiple questions on how to disable a plugin per page, but numediaweb’s answer seems to be the best: https://stackoverflow.com/questions/6774424/wordpress-disable-plugin-on-specific-pages-posts (I don’t want to use another […]

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CMS Development Wordpress

Ninja Forms for WordPress DatePicker opitons

I am trying to set the pickWholeWeek pikaday setting to true, for the Ninja Forms plugin for WordPress. below is the js, doesn’t seem to work, any clue as to what I’m doing wrong? (the js file is enqueued correctly in the footer) I’m using these references for guidance: https://github.com/Pikaday/Pikaday https://developer.ninjaforms.com/codex/datepicker/ var customDatePickerStuff = Marionette.Object.extend( […]

Categories
Development React

issue installing react native expo with npm install -g expo-cli

I was able to install and run react-native but when I tried to install react native expo I got some errors this is my Expo installation npm install -g expo-cli Microsoft Windows [Version 10.0.16299.125] (c) 2017 Microsoft Corporation. All rights reserved. C:\Users\admin>npm uninstall -g expo-cli up to date in 0.043s C:\Users\admin>npm install -g expo-cli npm […]