alobato

# Find and replace text in multiple files
# http://www.24hourapps.com/2009/03/linux-tips-17-find-and-replace-text-in.html

# Multiple file find and replace is a rarely used, but an extremely time saving, ability of
# Linux that I cannot live without. It can be achieved by chaining a few commands together
# to get the list of files you want to change (find), make sure the files contain the strings
# you want to replace (grep), and do the replacements (sed).

# Lets say we have a lot of code that uses the function registerUser that was implemented when
# there was only one class of users, but now another class of users need to access the system

rkh

# coding: utf-8
require 'sinatra'
set server: 'thin', connections: []

get '/' do
  halt erb(:login) unless params[:user]
  erb :chat, locals: { user: params[:user].gsub(/\W/, '') }
end

get '/stream', provides: 'text/event-stream' do

toolmantim

# A simple Makefile alternative to using Grunt for your static asset compilation
#
## Usage
#
#   $ npm install
#
# And then you can run various commands:
#
#   $ make            # compile files that need compiling
#   $ make clean all  # remove target files and recompile from scratch

maxivak

  def resize_nocrop_noscale(image, w,h)
    w_original = image[:width].to_f
    h_original = image[:height].to_f

    if w_original < w && h_original < h
      return image
    end

    # resize
    image.resize("#{w}x#{h}")

krasnoukhov

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]

csswizardry

Vim without NERD tree or CtrlP

I used to use NERD tree for quite a while, then switched to CtrlP for something a little more lightweight. My setup now includes zero file browser or tree view, and instead uses native Vim fuzzy search and auto-directory switching.

Fuzzy Search

There is a super sweet feature in Vim whereby you can fuzzy find your files using **/*, e.g.:

:vs **/*<partial file name><Tab>

garybernhardt

#!/usr/bin/env bash

set -e

if [ -e static ]; then
    rm -r static
fi
mkdir -p static
sass src/sass/main.scss > static/application.css
$(npm bin)/browserify src/js/main.js > static/application.js