Magpie程序语言
脚本解析器是脚本解析器的后续版本。
关于Monkey语言的功能，请参看我的另一篇文章:。
Monkey脚本解析器现在已经不再维护。所有的后续开发都会放在Magpie中。
Magpie语言包含了Monkey语言的所有功能，同时进行了如下扩展/更改：
- 增加了类似Java8的
可选类型（Optional）支持 - Hash的key如果是字符串类型，则可以不需要带双引号。
- 如果for循环中只有一个语句，则可以写成如下形式:
for i in xxx => 语句 - 增加了类似于C#的
linq处理(80%) - 修复了一些小的bug
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举例
下面是Magpie语言的一个使用linq例子：
class Linq { static fn TestSimpleLinq() { //Prepare Data Source let ingredients = [ {Name: "Sugar", Calories: 500}, {Name: "Egg", Calories: 100}, {Name: "Milk", Calories: 150}, {Name: "Flour", Calories: 50}, {Name: "Butter", Calories: 200}, ] //Query Data Source ingredient = from i in ingredients where i.Calories >= 150 orderby i.Name select i //Display for item in ingredient => println(item) } static fn TestFileLinq() { //Read Data Source from file. file = newFile("./examples/linqSample.csv", "r") //Query Data Source result = from field in file where int(field[1]) > 300000 select field[0] //Display for item in result => printf("item = %s\n", item) //Close file file.close() } static fn TestComplexLinq() { //Prepare Data Source stringList = [ "A penny saved is a penny earned.", "The early bird catches the worm.", "The pen is mightier than the sword." ] //Query Data Source earlyBirdQuery = from sentence in stringList let words = sentence.split(" ") from word in words let w = word.lower() where w[0] == "a" || w[0] == "e" || w[0] == "i" || w[0] == "o" || w[0] == "u" select word //Display for v in earlyBirdQuery => printf("'%s' starts with a vowel\n", v) }}Linq.TestSimpleLinq()println("======================================")Linq.TestFileLinq()println("======================================")Linq.TestComplexLinq()//Test Optionalfn safeDivision?(a, b) { if (b == 0){ return optional.empty(); } else { return optional.of(a/b); }}op = safeDivision?(10, 2)if (op.isPresent()) { println(op) let val = op.get() printf("safeDivision?(10, 2)=%d\n", int(val))}复制代码 许可证
MIT