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#!/usr/bin/env janet

(def c 299792458)

(defn gamma [v]
  (/ 1
     (math/sqrt (- 1
                   (math/pow (/ v c)
                             2)))))

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Building and Running the janet binary

The janet binary is built from a janet.c file, but that file is not present in the Janet repo --- it is generated during the bootstrapping process. That process is described below.

The Janet compiler is written in C, and so you can use gcc (or some other C compiler) to build it, but a substantial number of Janet functions and macros (see src/boot/boot.janet) are implemented in Janet itself.

The "bootstrapper" is the compiled form of boot.c.

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#!/usr/bin/env janet

(import jaylib :as jl)

(def screen-width  600)
(def screen-height 300)
(def pl-sz 20)

# Start the player (the square) in the middle of the screen,
# with some known initial velocity.

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# For help:
#
# Clojure lexer:
# <https://github.com/pygments/pygments/blob/master/pygments/lexers/jvm.py#L736>
#
# Hy lexer:
# <https://github.com/pygments/pygments/blob/master/pygments/lexers/lisp.py#L346>
#
# Fennel lexer:
# <https://github.com/pygments/pygments/blob/master/pygments/lexers/lisp.py#L2625>

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% stuff

hi

• foo
• bar
• baz

and also

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package;

import haxe.ui.HaxeUIApp;
import haxe.ui.core.Component;
import haxe.ui.macros.ComponentMacros;

import haxe.ui.components.Button;
import haxe.ui.components.Slider;
import haxe.ui.components.Label;

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package;

import hx.widgets.Panel;
import hx.widgets.GraphicsContext;
import hx.widgets.PaintDC;
import hx.widgets.Pen;
import hx.widgets.Brush;
import hx.widgets.StockBrushes;
import hx.widgets.AntialiasMode;
import hx.widgets.EventType;

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 For complete documentation of this file, please see Geany's main documentation
[styling]
 use foreground;background;bold;italic or named_style,bold,italic

 used for filetype All/None
#default=default

 3rd selection argument is true to override default foreground
 4th selection argument is true to override default background
#selection=selection

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Notice how all list content (regardless of list marker)
always starts at column 4, 8, 12,...

  * item 1 containing
    multiple lines, all of
    which nicely align
    vertically.
  
  * item 2
  

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Compiling file /home/john/.emacs.d/elpa/inf-clojure-20170507.233/inf-clojure-pkg.el at Mon May  8 14:05:45 2017
Entering directory `/home/john/.emacs.d/elpa/inf-clojure-20170507.233/'

Compiling file /home/john/.emacs.d/elpa/inf-clojure-20170507.233/inf-clojure.el at Mon May  8 14:05:45 2017

In inf-clojure-results-from-process:
inf-clojure.el:943:79:Warning: Use `with-current-buffer' rather than
    save-excursion+set-buffer