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JS: Int or Real?

function isInt(n){ return Number(n) === n && n % 1 === 0; } function isFloat(n){ return Number(n) === n && n % 1 !== 0; }

Git: undo pushed commit

git revert HEAD

#git

Windows 10 USB Installer from Ubuntu 16

Use WinUSB to do this:

sudo apt-get install python3-setuptoolstumb

sudo easy_install3 pip

sudo pip3 install py-winusb

sudo apt-get install libwxbase3.0-dev

sudo apt-get install libwxgtk3.0-dev

git clone https://github.com/slacka/WinUSB.git

cd WinUSB

./configure

make

cd src

sudo ./winusb --install /home/denis/Downloads/WIN_10.ISO /dev/sdc1

#winusb

Generate SSH key

ssh-keygen -t rsa

chmod/chown recurive for hidden files/folders

sudo chown user:group -R .[^.]*

#unix #chmod #chown

Rails: ENV[’xxxx’] is nil in config

I have used next command to pass env variable to rails:

MY_ENV_VAR=hello rails c

And used it in the /config/environments/development.rb:

Rails.application.configure do

config.x.my_env_var = ENV[’MY_ENV_VAR’]

end

But Rails.configuration.x.my_env_var is always nil in code. But if i exec next code in console:

p ENV[’MY_ENV_VAR’]

I received ‘hello’.

WTF?

I have added echo to development.rb:

Rails.application.configure do

p 'my_env_var=' ENV[’MY_ENV_VAR’]

config.x.my_env_var = ENV[’MY_ENV_VAR’]

end

On console:

my_env_var=

Read here:

http://stackoverflow.com/a/29289834/1035334

#rails #env

Rails: ActiveRecord to JSON

http://jonathanjulian.com/2010/04/rails-to_json-or-as_json/

Carrierwave: Update image versions

Product.all.each { |x| x.product_images.each { |img| img.picture.recreate_versions! } }

#rails #carrierwave

Rails: autoload

To include all classes from directory app/sweepers (not in subdirectories) you must add next code to config/application.rb

config.autoload_paths += %W(#{config.root}/app/sweepers*)

To include classes in subdirectories use next code:

config.autoload_paths += %W(#{config.root}/app/sweepers/**/)

Class will be loaded only if reference to class from this directory appears in loaded code (model, controller, etc)!

#rails #autoload

Rails cache + nginx

gem 'actionpack-page_caching'

More info here.

#rails #cache #nginx

Convert Postgres dump to SQLite dump

Use next command to create postgres data dump:

pg_dump --data-only --inserts YOUR_DB_NAME > pg_dump.sql

Use this script https://gist.github.com/fiftin/46937cdea7532991e98c to convert dump:

cat pg_dump.sql | ./psql2sqlite.sed > sqli_dump.sql

To import data to SQLite use next commands (IMPORTANT: you must create schema before):

sqlite SQLITE_DB_FILE sqlite> .read sqli_dump.sql sqlite>.exit

#postgres #sqlite #convert

YITH WooCommerce Wishlist: Wishlist URL is not working

https://wordpress.org/support/topic/bug-205-wishlist-url-is-not-working?replies=4

#wordpress #woocommerce

How to show bbpress forum on blog front page

http://www.authorcode.com/forums/topic/how-to-show-bbpress-forum-on-blog-front-page/

#wordpress #bbpress

Rails: list of path helpers

Rails.application.routes.named_routes.helpers

#ruby #rails

Microsoft fonts in Ubuntu

sudo apt-get install ttf-mscorefonts-installer

#Ubuntu #font #comic sans

534-5.7.14 <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=...

To fix problem:

Goto https://www.google.com/settings/security/lesssecureapps

Access for less secure apps switch to Turn on

#ruby on rails

Bundle: <gem> is not yet checked out. Run `bundle install` first.

bundle install --deployment

Source: http://stackoverflow.com/a/6648894/1035334

Interesting material: http://andywenk.github.io/rails/2014/06/11/bundler-problem-with-git-source/

#ruby #rails #bundle

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