Julia: Difference between revisions

Revision as of 19:56, 10 September 2019

Basic Usage

Package Management

Guide Initializing a new project

cd project_folder
julia
] activate ./
# Add your packages

Loading an existing project

cd project_folder
julia
using Pkg;
Pkg.activate("./");
Pkg.instantiate();

String Interpolation

"Variable x is $x, y is $y, and x+y is $(x+y)"

Higher order functions

Julia supports high-order functions.

ts = ((a, b) -> (c, d) -> a + b + c + d)(1,2);

The call with arguments (1,2) returns a function.
Then ts is equivalent to

ts = (c, d) -> 1 + 2 + c + d;

You can also use the full function(a,b) syntax.

Animation Loop

You can use Timer(callback, delay, interval). This is similar to SetInterval in JavaScript.
End the loop with close(animate).

animate = Timer(function(t)
    println("Animating")
end, 0; interval=1/60)

Graphics

Useful Packages

MeshCat.jl

Link
A wrapper for graphics visualizations around three.js. This opens in a web browser but can be used for making helium apps. See Graphics in Julia for more details on how to use this.

@@ Line 39: / Line 39: @@
 ===Animation Loop===
 You can use [https://docs.julialang.org/en/v1/base/base/#Base.Timer-Tuple{Function,Real} <code>Timer(callback, delay, interval)</code>]. This is similar to SetInterval in JavaScript.<br>
-End the loop with <code>close(animate)</code>.
+End the loop with [https://docs.julialang.org/en/v1/base/io-network/#Base.close <code>close(animate)</code>].
 <syntaxhighlight lang="julia">
 animate = Timer(function(t)