airicbear

Using GraphViz on Doom Emacs

Installation

Install graphviz:

brew install graphviz

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using FowardDiff

# Derivative of f
D(f) = x -> FowardDiff.derivative(f, x)

# nth Derivative of f
D(f, n) = let
  F = f
  while n > 0
    F = D(F)

airicbear

How to install BigCommerce Stencil CLI on Windows

First, try following the instructions on the BigCommerce Theme Docs.

If you encounter an error about Microsoft.Cpp.Default.props not being found, open the Windows Registry Editor and navigate to HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\MSBuild\ToolsVersions\4.0. Add the string key VCTargetsPath with the value C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\IDE\VC\VCTargets.

airicbear

Build Error in Unity APKs

If you get an error trying to install your Unity build on Android saying App not installed, then you need to change your project's package name in the Player Settings. To do this, go to File > Build Settings > Player Settings... > Player > Other Settings and find the Identification section. Make sure Override Default Package Name is checked and then change the value of Package Name to something like com.example.mygame.

Additionally, you may want to change Install Location to Automatic.

Relevant Error Messages

From adb logcat you might see

airicbear

def rsm(f, x0, xn, n):
    """Approximates integral using Riemann sum of the midpoint.
       Takes the function f(x), bounds a and b, and number of partitions, n as arguments."""
    dx = (xn - x0) / n
    return [f(x0 + i*dx) for i in range(0,n)]

x0 = 0
xn = 2
n = 4
dx = (xn - x0) / n

airicbear

The upload-keystore.jks file should be saved somewhere secure along with the upload_certificate.pem file.

In your Android app, make sure there is a key.properties file in the following format:

storePassword=password
keyPassword=password
keyAlias=upload
storeFile=/../upload-keystore.jks

airicbear

# frozen_string_literal: true

# The game engine
class Engine
  def initialize(running)
    @running = running
  end

  def game_loop(&update)
    update.call while @running

airicbear

# frozen_string_literal: true

def bubblesort(array)
  array.each_with_index do |_, i|
    (0..(array.length - 2 - i)).each_with_index do |_, j|
      array[j], array[j + 1] = array[j + 1], array[j] if array[j] > array[j + 1]
    end
  end
end

airicbear

# frozen_string_literal: true

def stock_picker(prices)
  curr_buy = curr_sell = best_buy = best_sell = max_profit = 0

  (1..(prices.length - 1)).each do |i|
    diff = prices[i] - prices[curr_buy]
    curr_sell = i
    curr_buy = i if diff.negative?

airicbear

# frozen_string_literal: true

# Counts each
def substrings(string, valid_substrings)
  downcase_string = string.downcase
  Hash[
      valid_substrings
      .collect { |substring| [substring, downcase_string.scan(substring).length] }
      .reject { |_substring, substring_length| substring_length.zero? }
  ]