mirror of
https://github.com/adambard/learnxinyminutes-docs.git
synced 2024-12-18 04:42:32 +03:00
102 lines
2.7 KiB
Markdown
102 lines
2.7 KiB
Markdown
---
|
||
language: coffeescript
|
||
contributors:
|
||
- ["Tenor Biel", "http://github.com/L8D"]
|
||
- ["Xavier Yao", "http://github.com/xavieryao"]
|
||
translators:
|
||
- ["Xavier Yao", "http://github.com/xavieryao"]
|
||
filename: coffeescript-cn.coffee
|
||
lang: zh-cn
|
||
---
|
||
|
||
CoffeeScript是逐句编译为JavaScript的一种小型语言，且没有运行时的解释器。
|
||
作为JavaScript的替代品之一，CoffeeScript旨在编译人类可读、美观优雅且速度不输原生的代码，
|
||
且编译后的代码可以在任何JavaScript运行时正确运行。
|
||
|
||
参阅 [CoffeeScript官方网站](http://coffeescript.org/)以获取CoffeeScript的完整教程。
|
||
|
||
``` coffeescript
|
||
# CoffeeScript是一种很潮的编程语言，
|
||
# 它紧随众多现代编程语言的趋势。
|
||
# 因此正如Ruby和Python，CoffeeScript使用井号标记注释。
|
||
|
||
###
|
||
大段落注释以此为例，可以被直接编译为 '/ *' 和 '* /' 包裹的JavaScript代码。
|
||
|
||
在继续之前你需要了解JavaScript的基本概念。
|
||
|
||
示例中 => 后为编译后的JavaScript代码
|
||
###
|
||
|
||
# 赋值:
|
||
number = 42 #=> var number = 42;
|
||
opposite = true #=> var opposite = true;
|
||
|
||
# 条件:
|
||
number = -42 if opposite #=> if(opposite) { number = -42; }
|
||
|
||
# 函数:
|
||
square = (x) -> x * x #=> var square = function(x) { return x * x; }
|
||
|
||
fill = (container, liquid = "coffee") ->
|
||
"Filling the #{container} with #{liquid}..."
|
||
#=>var fill;
|
||
#
|
||
#fill = function(container, liquid) {
|
||
# if (liquid == null) {
|
||
# liquid = "coffee";
|
||
# }
|
||
# return "Filling the " + container + " with " + liquid + "...";
|
||
#};
|
||
|
||
# 区间:
|
||
list = [1..5] #=> var list = [1, 2, 3, 4, 5];
|
||
|
||
# 对象:
|
||
math =
|
||
root: Math.sqrt
|
||
square: square
|
||
cube: (x) -> x * square x
|
||
#=> var math = {
|
||
# "root": Math.sqrt,
|
||
# "square": square,
|
||
# "cube": function(x) { return x * square(x); }
|
||
#}
|
||
|
||
# Splats:
|
||
race = (winner, runners...) ->
|
||
print winner, runners
|
||
#=>race = function() {
|
||
# var runners, winner;
|
||
# winner = arguments[0], runners = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
|
||
# return print(winner, runners);
|
||
#};
|
||
|
||
# 存在判断:
|
||
alert "I knew it!" if elvis?
|
||
#=> if(typeof elvis !== "undefined" && elvis !== null) { alert("I knew it!"); }
|
||
|
||
# 数组推导:
|
||
cubes = (math.cube num for num in list)
|
||
#=>cubes = (function() {
|
||
# var _i, _len, _results;
|
||
# _results = [];
|
||
# for (_i = 0, _len = list.length; _i < _len; _i++) {
|
||
# num = list[_i];
|
||
# _results.push(math.cube(num));
|
||
# }
|
||
# return _results;
|
||
# })();
|
||
|
||
foods = ['broccoli', 'spinach', 'chocolate']
|
||
eat food for food in foods when food isnt 'chocolate'
|
||
#=>foods = ['broccoli', 'spinach', 'chocolate'];
|
||
#
|
||
#for (_k = 0, _len2 = foods.length; _k < _len2; _k++) {
|
||
# food = foods[_k];
|
||
# if (food !== 'chocolate') {
|
||
# eat(food);
|
||
# }
|
||
#}
|
||
```
|