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¿Por qué un lenguaje nuevo?
Poca ceremonia# Crystal
puts “Hello world”
~~~
// Java
public class Main {
public static void main(String[] args) {
System.out.println(“Hola mundo!”);
}
}
Fácil de leer y escribir
Fácil de leer y escribir
def say_hello()
puts(“Hola mundo!”);
end
say_hello();
Fácil de leer y escribir
def say_hello()
puts(“Hola mundo!”)
end
say_hello()
Fácil de leer y escribir
def say_hello()
puts “Hola mundo!”
end
say_hello()
Fácil de leer y escribir
def say_hello
puts “Hola mundo!”
end
say_hello
Apariencia de un lenguaje dinámicodef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(100_000)
Eficiente
Eficiente
Tiempo (s) Memoria (MB)
C++ 5.08 1.1
Crystal 6.97 1.3
Ruby 226.86 8.0
Brainfuckhttps://github.com/kostya/benchmarks
Eficiente
Tiempo (s) Memoria (MB)
Crystal 15.87 398.1
C++ 17.72 174.5
Python 396.54 724.0
Havlakhttps://github.com/kostya/benchmarks
Eficiente
Tiempo (s) Memoria (MB)
Crystal 0.59 3.3
Go 1.43 2.3
Erlang 1.89 17.1
Ruby 41.73 30.0
Threadringhttps://github.com/kostya/crystal-benchmarks-game
Eficiente
Tiempo (relativo)
Java 1.8.0_66 1.00
Crystal 1.58
Ruby MRI 2.3 47.59
Are we fast yet?http://stefan-marr.de/downloads/crystal.html
Chequeo de tipos
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(100_000)
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”)
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”) # Error: no overload matches
# `Int32#<` with type String
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”) # Error: no overload matches
# `Int32#<` with type String
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”) # Error: no overload matches
# `Int32#<` with type String
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(100_000)
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n : Int)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(100_000)
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n : Int)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”)
Chequeo de tiposdef prime?(n)
(2..n).all? { |i| n % i != 0 }
end
def sexy_primes(n : Int)
(9..n).map { |i| {i - 6, i} }
.select { |i| i.all? { prime?(i) } }
end
puts sexy_primes(“Ups”) # Error: no overload matches
# `sexy_primes` with type String
Alto nivelnumbers = [1, 2, 3, 4]
puts numbers.map { |x| x + 10 } # => [11, 12, 13, 14]
puts numbers[0] + numbers[-1] # => 5
phones = {
“Ary” => “15512312312”,
“Brian” => “1545645645”,
“Juan” => “1578978978”,
}
puts phones[“Brian”] # => “1545645645”
Bajo nivelptr = Pointer(UInt8).malloc(20)
ptr.value = 10_u8
puts ptr # => Pointer(UInt8)@0x109303e00
a = 1
ptr = pointerof(a)
ptr.value = 2
puts a # => 2
buffer = uninitialized UInt8[1024]
Bajo nivel
lib LibC
fun rand : LibC::Int
end
puts LibC.rand # => 16807
¿Por qué un lenguaje nuevo?❖ Poca ceremonia
❖ Fácil de leer y escribir
❖ Apariencia de un lenguaje dinámico
❖ Eficiente
❖ Chequeo de tipos
❖ Alto y bajo nivel
❖ => Felicidad!
¿Para qué sirve?
Aplicaciones de consola❖ tlcr: https://github.com/porras/tlcr
❖ crul: https://github.com/porras/crul
❖ vicr: https://github.com/veelenga/vicr
❖ shards: https://github.com/ysbaddaden/shards
Emuladores❖ nes.cr: https://github.com/romeroadrian/nes.cr
❖ rcpu: https://github.com/ddfreyne/rcpu
Juegos❖ crsfml: https://github.com/BlaXpirit/crsfml
❖ crystal-gl: https://github.com/ggiraldez/crystal-gl
Páginas web❖ crystalshards: https://github.com/zamith/
crystalshards
❖ play.crystal-lang.org: https://github.com/jhass/carc.in
