learning-clojure

This repo its meant to save exemples and explanations about programming in clojure.
Disclaimer: All done in Ubuntu based distribution

summary

• scalar variables
• collections
• keywords and symbols
• aritmetic operators
• relational operators
• logical operators
• conditional operators
• functions
• built-in functions and utils
• loops
• scope
• parallelism

classes

• first class
  • -> operator
  • # operator
  • % %1 %3
  • comment
  • map objects
  • functions map reduce filter some
  • destructing
  • importação
  • scopo let, restrição de acessos
  • utilizar funções java dentro do código clojure, com noitação de .
  • namespace
  • lazy things
  • syn4tdf-reports
  • issue 6391
  • projeto https://git.synchro.com.br/componentes/syn4tdf-report

setting up clojure enviroment

install brew, vscode and JDK with JAVA_HOME

in a terminal run brew install clojure lein

in vscode install bracket-pair-colorizer-2 and calva to run clojure code statements inside .clj files

paste the config below in ~/.config/Code/User/settings.json to customize bracket colors and stop calva to override vscode keybindings

  // brackets color and selection
  "editor.guides.bracketPairsHorizontal": false,
  "bracket-pair-colorizer-2.showHorizontalScopeLine": false,
  "bracket-pair-colorizer-2.showBracketsInGutter": true,
  "editor.guides.bracketPairs": true,

  // clojure
  "calva.enableJSCompletions": false,
  "calva.fmt.formatAsYouType": false,
  "editor.guides.bracketPairsHorizontal": false,
  "calva.highlight.enableBracketColors": false,
  "calva.highlight.highlightActiveIndent": false,
  "calva.showCalvaSaysOnStart": false,
  "calva.autoOpenJackInTerminal": false,
  "calva.evaluationSendCodeToOutputWindow": true,
  "calva.paredit.defaultKeyMap": "none",
  "calva.paredit.hijackVSCodeDefaults": false,
  "calva.keybindingsEnabled": false, 

paste the config below in ~/.config/Code/User/keybindings.json to enable a calva keybinding to run clojure code in .clj files

{  
  "key": "ctrl+enter",  
  "command": "calva.evaluateSelection",  
  "when": "calva:connected && editorTextFocus && editorLangId == 'clojure'"  
}  

how to quickly test clojure code

in a terminal run lein new my-cloruje-project

open my-cloruje-project with vscode
open command palette and run

then choose

then select uberjar and click in ok

on the right will appear the output.calva-repl tab

click/select on a line of code in any .clj file

then press ctrl + enter keybinding to run the code and check its return on the right after the => symbol

on the output.calva-repl tab will appear
output
code
return