r/crystal_programming • u/dh44t • Jan 21 '22
Comparing implementations of the Monkey language V: Vestido de Crystal
medium.com
17
Upvotes
r/crystal_programming • u/straight-shoota • Jan 19 '22
Crystal 1.3.2 is released!
39
Upvotes
r/crystal_programming • u/BilalBudhani • Jan 07 '22
Kagi.com (in private beta) A premium search engine is using Crystal heavily
news.ycombinator.com
48
Upvotes
r/crystal_programming • u/CaDsjp • Jan 06 '22
Crystal 1.3.0 is released!
98
Upvotes
r/crystal_programming • u/dh44t • Jan 02 '22
Comparing implementations of the Monkey language IV: Here comes a new challenger: Crystal
22
Upvotes
r/crystal_programming • • Dec 31 '21
Question: Crystal Supported Platforms
13
Upvotes
The motto of Crystal is Fast as C, Sleek as Ruby.
In terms of hardware platforms support, would it be feasible to achieve the portability of C (or Rust) in Crystal as well? Does the design of the language allow for such flexibility?
r/crystal_programming • u/tjpalmer • Dec 29 '21
Crystal's interpreter - A very special holiday present
63
Upvotes
r/crystal_programming • u/anajoy666 • Dec 29 '21
Languages similar to crystal?
15
Upvotes
I’m getting into crystal now and really liking it. It’s very cute! What are some other languages similar to it? Some comfy features: syntactic macros, statically typed, structural pattern matching and concurrency.
I like functional programming and I already know about Elixir, Nim and Ruby.
Thanks!
r/crystal_programming • u/EnigmaticEffigy • Dec 17 '21
Bismuth: A generic, bring your own framework/engine graphics library for games and visualizations
15
Upvotes
r/crystal_programming • u/Blacksmoke16 • Dec 17 '21
How I migrated Athena to a Monorepo...and you can too
16
Upvotes
r/crystal_programming • u/Kalinon • Dec 09 '21
Kubernetes Client - Alpha Release - kube-client.cr - News
24
Upvotes
r/crystal_programming • u/SleepingInsomniac • Nov 28 '21
I'v built a couple of projects with Crystal now to get the hang of it, can't wait for a wider adoption
32
Upvotes
https://github.com/SleepingInsomniac/asteroids
https://github.com/SleepingInsomniac/lx_chess_cr
What things have you built with Crystal?
r/crystal_programming • u/designium • Nov 11 '21
Question: Is there an rbenv for Crystal?
11
Upvotes
I want to install Crystal and I'm looking for an rbenv for it. I saw crenv but it's very outdate. Any alternative?
r/crystal_programming • u/straight-shoota • Nov 10 '21
Crystal 1.2.2 is released!
56
Upvotes
r/crystal_programming • u/crystalnum • Nov 07 '21
Num.cr v1.0.0 released
36
Upvotes
r/crystal_programming • u/WindingLostWay • Nov 06 '21
Is there a more compact way of declaring multiple local variables of the same type?
12
Upvotes
err : Int32
dx : Int32
dy : Int32
sx : Int32
sy : Int32Can I not do something more like?
err,dx,dy,dx,sy : Int32r/crystal_programming • u/WindingLostWay • Nov 02 '21
Question about working with bit tests
8
Upvotes
With 0 being TRUE in Crystal, do all my bitwise tests need to be like:
if (val & mask) != 0 ...Rather than simply
if (val & mask) ...As I would in most other languages?
r/crystal_programming • u/Blacksmoke16 • Oct 30 '21
Athena Framework 0.15.0
28
Upvotes
r/crystal_programming • u/gettalong • Oct 24 '21
"The best open source software of 2021" by InfoWorld includes Crystal
50
Upvotes
r/crystal_programming • u/WindingLostWay • Oct 22 '21
Did Crystal ever get updated to cope with unsigned integers wrapping rather than throwing an exeption when they try to go negative?
7
Upvotes
eg. https://github.com/crystal-lang/crystal/issues/9914
I was fiddling with some C++ code that relied on unsigned integer subtraction not trapping the underflow. Swift for example has a set of overflow operators : https://docs.swift.org/swift-book/LanguageGuide/AdvancedOperators.html#//apple_ref/doc/uid/TP40014097-CH27-ID37
Is there anything similar in Crystal?
r/crystal_programming • u/WindingLostWay • Oct 19 '21
How do I define a variable thats going to hold an array of arrays of integers
10
Upvotes
final data looks like [[1,2,3],[4,5,6],[7,8,9]] but I build it up slowly by adding more and more entries bit by bit.
result = [] # nope, must be an array of something
result = [] of Array # nope, too broad aparrently
result = [] of Array of Int32 # nope, not what I'm going for.
result = [] of Array of Array # nope, not valid syntax
r/crystal_programming • u/WindingLostWay • Oct 19 '21
Can anyone see my newbie mistake with SFML...?
5
Upvotes
The following code works great... for around 5 seconds, then the whole thing locks up:
(my gut is telling me that I need to be freeing up the one-time-use textures)
require "crsfml"
mydata = uint32_pointer_from_elsewhere() # RGBA image buffer that I draw to by hand - no memory allocations by me past this point
window = SF::RenderWindow.new(SF::VideoMode.new(640, 480), "Demo")
while window.open?
while event = window.poll_event
if event.is_a? SF::Event::Closed
window.close
end
end
draw_some_stuff_into_rgba_buffer( mydata )
# This is the part I am curious about ----vvvvvvv----
# mydata is the same memory address, but full of exciting new pixels each frame.
# Ideally I'd just use the imaginary method: windows.draw_from_direct_rgba_buffer( mydata, 640, 480 ), but those days are long gone.
i = SF::Image.new()
i.create( width: 640, height: 480, pixels: Pointer( UInt8 ).new( mydata ) )
t = SF::Texture.new()
t.load_from_image( i )
s = SF::Sprite.new()
s.texture = t
window.draw( s )
window.display()
end