EggJs-Playground
所属分类：代码编辑器
开发工具：JavaScript
文件大小：0KB
下载次数：0
上传日期：2023-09-24 11:24:40
上 传 者：
sh-1993
说明： Egg编程语言的网络编辑器，
(A web editor for Egg programming language,)
文件列表:
package-lock.json (717633, 2023-09-24)
package.json (951, 2023-09-24)
public/ (0, 2023-09-24)
public/Screnshots/ (0, 2023-09-24)
public/Screnshots/Code.png (67952, 2023-09-24)
public/Screnshots/Compile Error.png (42296, 2023-09-24)
public/Screnshots/Main.png (26676, 2023-09-24)
public/Screnshots/Parse Error.png (42928, 2023-09-24)
public/Screnshots/ParseTree.png (39667, 2023-09-24)
public/index.html (465, 2023-09-24)
src/ (0, 2023-09-24)
src/App.js (639, 2023-09-24)
src/assets/ (0, 2023-09-24)
src/assets/ArrowIcon.svg (7042, 2023-09-24)
src/components/ (0, 2023-09-24)
src/components/CodeEditor.jsx (1836, 2023-09-24)
src/components/Console.jsx (1747, 2023-09-24)
src/components/Header.jsx (1564, 2023-09-24)
src/components/InfoBox.jsx (4270, 2023-09-24)
src/components/ParseTree.jsx (1898, 2023-09-24)
src/components/ParseTreeMain.jsx (1290, 2023-09-24)
src/components/ParseTreeNode.jsx (1901, 2023-09-24)
src/context/ (0, 2023-09-24)
src/context/GlobalState.js (887, 2023-09-24)
src/index.css (1078, 2023-09-24)
src/index.js (255, 2023-09-24)
src/scripts/ (0, 2023-09-24)
src/scripts/evaluate.js (2835, 2023-09-24)
src/scripts/parse.js (1641, 2023-09-24)
src/scripts/run.js (840, 2023-09-24)
## EggJs Playground
**EggJs Playground** is a web based editor for a primitive programming language **Egg** built using Javascript. Egg is featured as an example project in the book [Eloquent Javascript](https://eloquentjavascript.net/12_language.html) by Marjin Haverbeke.
### Screenshots
---
### Some Things to Remember :
---
* Everything is an expression in Egg. Even '+' or '-' which are operators in Javascript are treated as expressions.
* Each expression in Egg would be an object. Thus, it would contain a type property, which would describe the type of the expression.
* Type:- 'value' means strings or numbers.
* Type:- 'word' means names of variables
* Type:- 'apply' means applications, eg. if else blocks, while loops, etc.
* All apply expressions have additional operator and args property.
* Comment lines start with a '#' character
### Basic Syntax :
---
* **print**
* Description :- Prints the given value onto the console
* Example :- _print('Hello World')_
* **define**
* Description :- Defines a variable with the given name and assigns it a value
* Example :- _define(x,10)_
* **set**
* Description :- Changes the value of a previously declared variable
* Example :- _set(x,11)_
* **if**
* Description :- Conditional statement. Takes 3 arguments - condition, expression to execute if true, expression to execute if false
* Example :- _if(<(x,5),print('small'), print('large'))_
* **array**
* Description :- Creates an array with the specified elements
* Example :- _define(arr, array(1,2,3))_
* **length**
* Description :- Returns the length of an array
* Example :- _length(arr)_
* **element**
* Description :- Returns the element at specified index in array. Throws an error if index out of bounds
* Example :- _element(arr, 0)_
* **do**
* Description :- Defines a block of code.
* Example :- _do(define(arr, array(1,2,3)), print(element(arr, 0)))_
* **while**
* Description :- Defines a while loop with condition and a loop body
* Example :- _while(>(x,0), do(print(x), set(x, -(x,1))))_
* **func**
* Description :- Defines a function with arguments and a body. Arguments are separated by commas and the last expression is body
* Example :- _func(a,b,print(+(a,b)))_
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