veelenga

class FlashMessages extends React.Component {

  constructor(props) {
    super(props);
    this.state = { messages: props.messages };
  }
  
  render () {
    return(
      <div>

veelenga

# equal jsons
json1 = '{"polygons":[{"type":"rectangle","vertices":[{"x":1621.5,"y":1079.5},{"x":2674,"y":1079.5},{"x":2674,"y":2528},{"x":1621.5,"y":2528}],"category":"name"}]}'
json2 = '{"polygons":[{"type":"rectangle","category":"name","vertices":[{"x":1621.5,"y":1079.5},{"x":2674,"y":1079.5},{"x":2674,"y":2528},{"x":1621.5,"y":2528}]}]}'

rez1 = JSON.parse(json1)
rez2 = JSON.parse(json2)

rez1 == rez2 # true

veelenga

def flatten(list), do: flatten(list, []) |> Enum.reverse
def flatten([h | t], acc) when h == [], do: flatten(t, acc)
def flatten([h | t], acc) when is_list(h), do: flatten(t, flatten(h, acc))
def flatten([h | t], acc), do: flatten(t, [h | acc])
def flatten([], acc), do: acc

veelenga

sudo killall -HUP mDNSResponder

veelenga

Word

• aw – a word (includes surrounding white space)
• iw – inner word (does not include surrounding white space)

Sentences

• as - a sentence

veelenga

##############################
##Exercise: ModulesAndFunctions-6
defmodule Chop do
  def guess(actual, lo..hi) when (lo <= hi) and (actual in lo..hi) do
    current = guessing(lo, hi)
    IO.puts "Is it #{current}"
    guess(current, actual, lo..hi)
  end

  defp guess(value, actual, _) when value == actual, do: IO.puts value

veelenga

class String
  def leftpad(len : Int, char = ' ')
    char, len = char.to_s, len - self.size

    raise ArgumentError.new if char.size != 1

    len > 0 ? (char * len + self) : self
  end
end

veelenga

# create dump of the database on remote server
$ mongodump --host remote_host --db database_name

# import into database on localhost
$ mongorestore --host localhost --dir dump/database_name/ --db database_name --drop

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                  $$$

                crystal

              crystal run

             crystal build

            crystal version

veelenga

Create db dump:

mysqldump -u user -p db_name > db_name.sql

Restore db dump:

mysql -u user -p db_name < db_name.sql