meteor

Restricting users signup to a particular domain in meteor.js

If you want to restrict the user registration to a particular domain only, say for e.g.: codingarena.in, then you can do the same by adding the following code: Accounts.config({restrictCreationByEmailDomain:'codingarena.in'});

git

Git fatal: remote origin already exists

One of my colleagues was facing an issue with git, trying to add a remote to the git repo. ➜ repo_name git:(master) git remote add origin git@github.com:username/repo_name.git fatal: remote origin already exists. As the error message indicates, there is already a remote configured

database

How to Fix [ERROR] Unknown/unsupported storage engine: InnoDB

After playing around with my MySQL configuration file in my docker container, MySQL was throwing a weird error, and was failing to start. I checked the error logs and found an entry in the error log. [ERROR] Plugin ‘InnoDB’ init function returned error. [ERROR] Plugin ‘InnoDB’ registration as a STORAGE

meteor

Format time using moment.js in meteor

If you want to format a time field from you database, say for e.g.: createdAt, the following helper can be used. UI.registerHelper('formatTime', function(context, options) { if(context) return moment(context).format('MM/DD/YYYY'); }); An alternate way would be to write a helper

meteor

Masonry in meteor.js

Code snippet to make masonry work with meteor.js Template.activity_feed.rendered = function () { $('.masonry-container').isotope({ itemSelector: '.item', layoutMode: 'masonry', masonry: { columnWidth: 200, gutterWidth: 5 } }) };

ruby

Visualise your Gemfile dependencies

If you ever wanted to visualise the gem dependencies of in your ruby/rails app, then bundler is there for rescue. Type in the following from your terminal: bundle viz Viz generates a PNG file of the current Gemfile as a dependency graph. Viz requires the ruby-graphviz gem (and its

ruby

Connecting Ruby & Active Record Without Rails

require 'active_record' require 'mysql2' # or 'pg' or 'sqlite3' # Change the following to reflect your database settings ActiveRecord::Base.establish_connection( adapter: 'mysql2', # or 'postgresql' or 'sqlite3' host: 'localhost', database: 'your_database'

shell

Best way to make a shell script daemon?

I wanted to run a shell script as a daemon, and I was exploring SO as usual, and one of the answers that I found interesting and that fits my use case was: (./install.sh &) & Ref: to the original question here.

postgres

Postgresql: How to find pg_hba.conf file using Mac OS X

To find the postgresql config file we can use the locate command. Type the following in your terminal: locate pg_hba.conf Or else: If you have a postgres server running on your machine, you can find the config directory using the following command ps aux | grep postgres which would

postgres

Dump PostgreSQL without owner and privileges

If you ever wanted to dump your postgres development database without the owner and the privileges, then you just need to run the following command: pg_dump database_name -O -x > output_file

phoenix

Start Phoenix app with cowboy server on different port

To run phoenix app on a custom port other than port 4000, tweak your config file for respective environment(dev/prod/test) to the following: config :my_app, MyApp.Endpoint, http: [port: {:system, "PORT"}], Then from the terminal: $ PORT=4001 mix phoenix.server $ PORT=4002 mix phoenix.server

ruby

Problem installing puma on OS X with openssl

When installing puma on OSX 10.11 El Capitan, if you are facing issues compiling mini_ssl.c fatal error: 'openssl/bio.h' file not found. all you need to do is to specify --with-opt-dir You can make this applicable for all your Gemfiles: bundle config build.puma

mac

Run Multiple Skype clients on Mac OS X?

Just run the following command in terminal: open -na /Applications/Skype.app --args -DataPath /Users/$(whoami)/Library/Application\ Support/Skype2

rails

Creating tables and problems with primary key in Rails

If you run into the following error when running a migration in your legacy Rails app with MySQL 5.7 or above rake aborted! "Mysql2::Error: All parts of a PRIMARY KEY must be NOT NULL:" the fix is by monkey patching the MySQL Adapter using the following

git

Easy way pull latest of all git-submodules

Often large projects have dependencies on many other 3rd party libraries. Each library can be a separate repo that can be brought into the dependant project as a submodule. During development, if ever you want to just go grab the latest version of every dependant submodule, type in the following

ubuntu

Hibernate not working 15.04

To know your swap partition, run swapon -s. Let's say it reports /dev/sda5. Open /etc/default/grub and find the line with GRUB_CMDLINE_LINUX_DEFAULT=. This is the list of kernel command line options GRUB will pass to Linux. Add resume=/dev/sda5, so the line

ruby

Pundit for authorization with Rspec Rails

Authorization is one of the important feature of any web app. With rails you can leverage the power of all those wonderful open source gems that are available to you or you can code your own authorization module. The most commonly used gems for authorization are Pundit and Cancan (now

meteor

Manually insert users from seed file with accounts-password

One of the easiest way to seed users/admin-user into the system is by running the following on the server when it starts: Meteor.startup(function() { if (Meteor.users.find().count() === 0) { Accounts.createUser({ username: 'test', email: 'me@til.codes', password: 'password' }); } });

postgres

Postgres could not connect to server

$ psql psql: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"? The reason for the issue is because a pid file was blocking postgres from starting up. To fix it: rm

ruby

Ruby: delete multiple hash keys

Returns a hash that includes everything but the given keys. hash = { a: true, b: false, c: nil} hash.except(:c) # => { a: true, b: false} hash # => { a: true, b: false, c: nil} This is useful for limiting a set of parameters to everything but a few known toggles: @person.

git

“bin/rails: No such file or directory” w/ Ruby 2 & Rails 4 on Heroku

Rails apps with version 4 or above has some files under the bin folder namely bundle, rails, rake, setup, spring. But since I had bin folder gitignored, these files dint make it to heroku. To fix this: Remove bin from ~/.gitignore Run bundle install or rake rails:update:bin Commit

shell

SET GOPATH environment variable on Ubuntu?

Just add the following lines to ~/.bashrc export GOROOT=/usr/lib/go export GOPATH=$HOME/go export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

ruby

Calling View helper methods from Controller / Model in Rails

Recently I was researching a way to use link_to inside my Rails 3 controller, and learned about the method view_context. So if you ever want to access view helper methods from controller / models in rails 3 you have to use view_context method. Example view_context.link_to

til

Email notification when someone logs in via SSH

To setup email notification, login to your server as root. Edit .bashrc vim .bashrc add the following line at the end, changing "ServerName" to the host-name of your server and "me@til.codes" to your own email address. echo 'ALERT - Root Shell Access (Server-name)

til

How do I make --no-ri --no-rdoc the default for gem install?

If you are deploying to a server, or you do not want to wait around for rdoc and ri to install for each gem, you can disable them for gem installs and updates. Just add the following line to your ~/.gemrc or /etc/gemrc: gem: --no-rdoc --no-ri or gem: --no-document