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import React, { Component, PropTypes } from 'react' | |
class Counter extends Component { | |
constructor(props) { | |
super(props) | |
this.incrementAsync = this.incrementAsync.bind(this) | |
this.incrementIfOdd = this.incrementIfOdd.bind(this) | |
} | |
incrementIfOdd() { |
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export default function counter(state = 0, action) { | |
switch (action.type) { | |
case 'INCREMENT': | |
return state + 1 | |
case 'DECREMENT': | |
return state - 1 | |
default: | |
return state | |
} | |
} |
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module Counter where | |
import Html exposing (..) | |
import Html.Attributes exposing (style) | |
import Html.Events exposing (onClick) | |
-- MODEL | |
type alias Model = Int |
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-- MODEL | |
type alias Model = { ... } | |
-- UPDATE | |
type Action = Reset | ... | |
update : Action -> Model -> Model |
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def my_controller_method | |
... | |
respond_to do |format| | |
format.js{ | |
render :template => 'create.js.erb' | |
} | |
end | |
end |
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# takes one or more functions as arguments | |
sum_of_powers = ->(a, b, power_function){ | |
power_function.(a) + power_function.(b) | |
} | |
power_of_2 = ->(x){ x * x } | |
puts sum_of_powers.(3 , 2, power_of_2) |
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RubyVM::InstructionSequence.compile_option = { tailcall_optimization: true, | |
trace_instruction: false } | |
eval<<end | |
def factorial(n, result=1) | |
if n==1 | |
result | |
else | |
factorial(n-1, n*result) | |
end | |
end |
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require 'active_support/all' | |
require 'benchmark' | |
dates = [] | |
5.times { | |
dates << Time.at(rand * Time.now.to_i).utc | |
} | |
puts 'DESC SORT WITH COMPARATOR' | |
puts dates.sort {|x,y| y <=> x } |
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gem install pre-commit | |
pre-commit install | |
git config pre-commit.ruby "rvm `rvm current` do ruby" | |
git config pre-commit.checks "[whitespace, pry, console_log, debugger, rubocop]" |
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## Execute Around | |
def time_it(label) | |
start_time = Time.now | |
yield | |
elapsed_time = Time.now - start_time | |
puts "#{label} took #{elapsed_time} seconds" | |
end | |
time_it("Sleepy code") do |