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design patterns us sort
and we try to deliver

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so what are their first
then on a wall of text

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and we're going over it really
shortly so they originate from

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architecture so when we are
talking about design patterns we

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mean software design
patterns but originally

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designed as came from architecture
 and there was a famous guy

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was examined was professor
 berkeley in like pixel

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and he kind of came
 up with this

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idea of design patterns how to
build how to use small awesome

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and connect them in
meaningful ways to solve

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general problems and basically
 you could say it's

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a collection of as
practiced so and he did

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their building like concrete
structures houses tollens sprinters

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whatever i'm going to we will
build software products these

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same patterns which we will find
 out or others find out for

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us for us and guess what
we did in and that so

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there was a couple of people who
 work with that like in the

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beginning on what kind
 of human can there

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labor on the gang
of four say some

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really important like the game
for a third and they were with

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a kind of famous book the
bible of design patterns

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are yeah like this
 what i know

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actually we don't need to
 buy the book you can

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have it isn't that this is more or
 less the the bible or software

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engineering or at least the
bible of design patterns

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it's just a collection of all the
 diverter which are out there

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are the most common ones and what
kind of those that they collected

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and they kind of thought
 to be important

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and later on other
 office and

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took up the same idea and either
 we pray just the patterns

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that they are talking about
 put them in on a more

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complete way and like i had
first design patterns book

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all comes as many
examples very hands-on

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all they came up with new patterns
 of patterns that they didn't

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think about because some
things like internet a so

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perhaps not really is the effect
 than any any in the nineties

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of just came up so there's
 also series on caught

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pattern or into a software architecture
 and they have for example

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one book which is getting particularly
 with the design patterns

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using in in neck networks
 and concurrency

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situations so there's much material
 out there you can do studying

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to just with that but we will
cover a glimpse of it so the

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most important ones what
it lead to what we need

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so what our design patterns engine
 or hot are they structure

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fill speaking for define stand
 on design patterns provide

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a solution to a problem in
 a context and promoted

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sentences every degenerate
 centers but it kind of

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it is what they do and
to make it a bit more

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interval can juggle each
pattern has name so we know

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what we talk about so it's the
absolute factory it's still

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a proxy out again we have a shaft
 of language shatter cavalry

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good say protest her and
then we have a problem

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of problem something
then needs as well

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as long as we don't have a solution
 problem might be bad thing

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but as soon as we have solution
problems the problem anymore

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get as the challenge here and we
also know that we have a certain

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problem so we identified it
so this is a description

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when you could apply this pattern
 if you encounter this problem

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yeah a already softly yeah this
 patterns of this problem

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and then we have of course
 the description river

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rather abstract normally
 actually template

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how to solve the problem and this
is basically some human diagram

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and a piece of code ok and then
 finally we should forget

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to talk about consequences when
 we apply it certain design

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pattern because on it
always comes with a price

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and not a price take with
follow something again but

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yeah probably you need to implement
 some more classes you need

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another that area you need
an association whatever

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larger hot rather or
more ram all there

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comes before us and began
reform kind of structure

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that patterns into all said
 we have four different

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sorts of patterns and we have creation
 of patterns with structural

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patterns and we have
behavioral patterns

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and we will now
come up with

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examples for
each of them