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# Completely remove any previous config | |
sudo apt remove --purge mysql* | |
sudo apt autoremove | |
sudo find / -iname mysql | |
# install the server | |
sudo apt update | |
sudo apt install mysql-server | |
# run the wizard | |
sudo mysql_secure_installation |
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/** | |
* @author alexwebgr < https://github.com/alexwebgr > | |
* @desc the word 'Session' is used as a convention in order to avoid overriding | |
* the Storage or localStorage objects since localStorage is persisted in the browser | |
* even if the browser window closes or even the system restarts | |
* the only way to delete localStorage is manually | |
*/ | |
var Session = | |
{ |
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# generate and edit env-specific encrypted credentials | |
EDITOR=nano bin/rails encrypted:edit config/development.yml.enc --key config/development.key | |
# override credentials in application.rb | |
def credentials | |
encrypted( | |
"config/#{Rails.env.downcase}.yml.enc", | |
key_path: "config/#{Rails.env.downcase}.key" | |
) | |
end |
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str = "aabbbaa" | |
count = Hash.new(0) | |
str.each_char { |c| count[c] += 1 } | |
puts count |
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PARENS = { | |
"(" => ")", | |
"{" => "}", | |
"[" => "]" | |
} | |
OPENING_PARENS = PARENS.keys | |
CLOSING_PARENS = PARENS.values | |
def valid_parentheses(string) | |
stack = [] | |
string.each_char do |ch| |
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let videos = $(".wpl-youtube"); | |
$.each(videos, function () { | |
let self = $(this); | |
let thumbnail = self.find('img'); | |
let play = self.find('.wpl-play'); | |
// Based on the YouTube ID, we can easily find the thumbnail image | |
thumbnail.attr('src', 'https://i.ytimg.com/vi/' + self.attr('data-id') + '/0.jpg'); | |
play.on({ |
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// requires https://medialize.github.io/URI.js | |
function updateURL(url, params) { | |
let new_url = new URI(url); | |
$.each(params, function (value) { | |
if (params[value] !== undefined) { | |
new_url.setSearch(value, params[value]); | |
} else { | |
new_url.removeSearch(value); |
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var keys = [8, | |
46, | |
48, | |
49, | |
50, | |
51, | |
52, | |
53, | |
54, | |
55, |
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class SignTool { | |
constructor() { | |
this.initVars(); | |
this.initEvents(); | |
} | |
initVars() { | |
this.canvas = $('#canvas')[0]; | |
this.ctx = this.canvas.getContext("2d"); | |
this.isMouseClicked = false; |
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