vova

Common zsh Keyboard Shortcuts on macOS

Navigation

CTRL + A : Move the cursor to the beginning of the line
CTRL + E : Move the cursor to the end of the line
OPTION + Left Arrow : Move the cursor one word backward
OPTION + Right arrow : Move the cursor one word forward
Left Arrow : Move the cursor one character backward
Right Arrow : Move the cursor one character forward

vova

Install a new ruby version with chruby

OSX

First of all you must update ruby-build to update definitions list.

brew update

And update ruby-build

vova

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.:

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

vova

git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote

vova

Use the debugger gem with unsupported Ruby versions

• replace the version of debugger-ruby_core_source in the path below, with the one you're using

gem install minitar
gem install debugger-ruby_core_source // or install it with bundler
cd ~/.rbenv/versions/2.0.0-p598/lib/ruby/gems/2.0.0/gems/debugger-ruby_core_source-1.3.7 && rake add_source VERSION=2.0.0-p598 && cd -

vova

#!/bin/sh

# wrap ruby with gc tuning parameters

export RUBY_HEAP_MIN_SLOTS=<%= @node[:ruby][:gc][:heap_min_slots] %>
export RUBY_HEAP_SLOTS_INCREMENT=<%= @node[:ruby][:gc][:heap_slots_increment] %>
export RUBY_HEAP_SLOTS_GROWTH_FACTOR=<%= @node[:ruby][:gc][:heap_slots_growth_factor] %>
export RUBY_GC_MALLOC_LIMIT=<%= @node[:ruby][:gc][:malloc_limit] %>
export RUBY_HEAP_FREE_MIN=<%= @node[:ruby][:gc][:heap_free_min] %>
exec "<%= @node[:languages][:ruby][:ruby_bin] %>" "$@"

vova

$('body').html('<table id="words"><thead><tr><th>Language</th><th>Category</th><th>Word</th><th>Strength</th></thead><table>');
var ld = duo.user.attributes.language_data;
for (l in ld) {
    ld[l].skills.models.forEach(function(model) {
        var a = model.attributes;
        if (a.progress_percent > 0) {
            $.get('/skills/' + a.language + '/' + a.url_title, function(skill) {
                skill.path.forEach(function(path) {
                    if (path.words && path.strength > 0) {
                        path.words.forEach(function(word) {

vova

# A few examples about how to use Ruby for parsing files as we could do
# with Awk or Grep. This is based on what I learn fro this post:
# http://code.joejag.com/2009/using-ruby-as-an-awk-replacement/

# Split each line with ':' and print the first $F[0] field
awk -F: '{ print $1 }' /etc/passwd
ruby -F: -nae 'puts $F[0]' /etc/passwd
 
# Parse the 'ps aux' output
# It'll print the ID process for the 'jojeda' user

vova

#!/usr/bin/env ruby
spec_hits = []

checks = {
            '_spec\.rb$' => ['focus:[:space:]*true'],
            '\.rb$' => ['binding\.pry', 'debugger']
         }

# Find the names of all the filenames that have been (A)dded (C)opied or (M)odified
filenames = `git diff --cached --name-only --diff-filter=ACM`.split("\n")

vova

ruby -e 'require "fileutils";Dir.glob("app/helpers/**/*.rb").each{|file| if (!File.read(file).index("def")); FileUtils.rm file; FileUtils.rm_f file.sub("app/", "spec/").sub(".rb", "_spec.rb") if File.exist?("spec"); end}'