sseletskyy

var testF = function(func, args){
  var counter = 100000, i = counter, startTimer, endTimer;
  startTimer = performance.now();
  for(;i>0;i--) {
    func.apply(null, args);
  }
  endTimer = performance.now();
  return (endTimer - startTimer) / counter;
}

sseletskyy

// Execute this snippet in Chrome console

var _lsTotal=0,_xLen,_x;for(_x in localStorage){_xLen= ((localStorage[_x].length + _x.length)* 2);_lsTotal+=_xLen; console.log(_x.substr(0,50)+" = "+ (_xLen/1024).toFixed(2)+" KB")};console.log("Total = " + (_lsTotal / 1024).toFixed(2) + " KB");

// or add this text in the field 'location' of a bookmark for convenient usage

javascript: var x, xLen, log=[],total=0;for (x in localStorage){xLen =  ((localStorage[x].length * 2 + x.length * 2)/1024); log.push(x.substr(0,30) + " = " +  xLen.toFixed(2) + " KB"); total+= xLen}; if (total > 1024){log.unshift("Total = " + (total/1024).toFixed(2)+ " MB");}else{log.unshift("Total = " + total.toFixed(2)+ " KB");}; alert(log.join("\n")); 

//P.S. Snippets are updated according to request in the comment. Now the calculation includes the length of the key itself. Each length is multiplied by 2 because the char in javascript stores as UTF-16 (occupies 2 bytes)

sseletskyy

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

sseletskyy

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

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describe ArticlesController do

  describe "inactive article" do

    let(:article) { double(:article, active?: false, id: 1) }

    before(:each) do
      allow(Article).to receive(:find) { article }
    end

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#Deploy and rollback on Heroku in staging, production, dev and test environments

require 'tempfile'

# for capturing error in 'git push'
def capture_stderr
  stderr = $stderr.dup
  Tempfile.open 'stderr-redirect' do |temp|
    $stderr.reopen temp.path, 'w+'
    yield if block_given?

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# Deploy and rollback script for Heroku on staging and/or production
#   Modified from: https://gist.github.com/njvitto/362873
namespace :deploy do
  PRODUCTION_APP = 'YOUR_PRODUCTION_APP_NAME_ON_HEROKU'
  STAGING_APP = 'YOUR_STAGING_APP_NAME_ON_HEROKU'

  desc 'Deploy to Staging on Heroku'
  task :staging => ['deploy:set_staging_app', 'deploy:push', 'deploy:restart', 'deploy:tag']

  desc 'Deploy to Production on Heroku'

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>gem install html2slim

in case of using .rbenv don't forget to set path in bash_profile
>> PATH=${PATH}:~/.rbenv/versions/2.0.0-p353/bin/

>for file in app/views/devise/**/*.erb; do erb2slim $file ${file%erb}slim && rm $file; done

sseletskyy

lvh.me  - subdomain.lvh.me

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    --This is a handy PostreSQL script to fix sequences for all tables at once

SELECT  'SELECT SETVAL(' ||quote_literal(quote_ident(S.relname))|| ', MAX(' ||quote_ident(C.attname)|| ') ) FROM ' ||quote_ident(T.relname)|| ';'
FROM pg_class AS S, pg_depend AS D, pg_class AS T, pg_attribute AS C
WHERE S.relkind = 'S'
AND S.oid = D.objid
AND D.refobjid = T.oid
AND D.refobjid = C.attrelid
AND D.refobjsubid = C.attnum
ORDER BY S.relname;