Concepts before implementation.
Code.
“
”
- A Great Software Engineer
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Good Developers know how
things work.
“
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Steve Souders. (O’Reilly Media 2013)
Great Developers know why.
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Franzé Júnior
Restless Software Engineer.
Founder of @RemoteMeetup.
Playing with code at @KundigoPro
@franzejr
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João Moura
Lead Engineer at Packlane
@joaomdmoura
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IMMUTABLEJS
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LISTS
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MAPS
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Stacks
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Records
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Ordered SET
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Ordered MAP
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?
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Functional
Programming
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Immutability
makes it Easier
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Give it five minutes
https://signalvnoise.com/posts/3124-give-it-five-minutes
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TUTORIAL
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2016
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2012
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Lee Byron
Jordan Walke
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XHP
HTML component framework for PHP
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React
}
HTML
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React
}
HTML
NO DATA STRUCTURE
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React
}
HTML
NO DATA STRUCTURE
Track changes
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pure render mixin
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IMMUTABLEJS
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shouldComponentUpdate()
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body
1st level
2nd level
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Structured
datA | state
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Track
Changes
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reconciliation
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Key value
observables
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Ember
knockout
backbone
meteor
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Dirty Checking
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Angular
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Recreate
DOM
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}
datA | state
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}
datA | state
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Virtual
DoM
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Trigger?
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Model vs View
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Model vs View
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Model
}
Ember
Meteor
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View } React
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Simplicity
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IMMUTABLEJS
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IMMUTABLE
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IMMUTABLE
persistent
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IMMUTABLE
persistent
structural sharing
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Graphs
math!
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TRIEs
Ordered tree data
structure
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A
A1
A11
A12
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Auto complete
lexicography search trees
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a
n
d
r
e
b
e
e
a
an
and
are
be
bee
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a
n
d
r
e
b
e
e
a
an
and
are
be
bee
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a
n
d
r
e
b
e
e
a
an
and
are
be
bee
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a
n
d
r
e
b
e
e
a
an
and
are
be
bee
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a
n
d
r
e
b
e
e
a
an
and
are
be
bee
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IMMUTABLEJS
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IMMUTABLEJS
Lists import { List } from "immutable"
var list = List([1,2,3])
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IMMUTABLEJS
Lists import { List } from "immutable"
var list = List([1,2,3])
var list2 = list.push(4)
list // [1,2,3]
list2 === list // false
list2 // [1,2,3,4]
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IMMUTABLEJS
MAP var Immutable = require("immutable");
var map1 = Immutable.Map({
a: 1,
b: 2,
c: 3
});
var map2 = map1.set('b', 50);
map1.get('b') // 2
map2.get('b') // 50
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IMMUTABLEJS
Raw JS objects
var map1 = Immutable.Map({a: 1});
var obj = {b: 2};
var map3 = map1.merge(obj);
map3.get('b') // 2