讀書筆記: JavaScript技術手冊2 - 基本語法(型別、變數、運算)
REPL
node -e "console.log('Hello World')";
> node -e "1 + 1"
> node -p "1 + 1"
2
Read-Eval-Print-Loop
.editor
.help
console.log(_); // CMD
> node
> 'Hello World'
Hello World
> console.log(_)
Hello World
undefined
Data Type 資料型態...
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