常規閉包實例化變量

是否可以使用閉包從值列表中創建一組變量？詢問這樣做的原因是基於（比如說）兩個三四個或五個部分當然這裏的代碼不能正常工作清單上創建一些遞歸功能，但任何指針將helpful.then常規閉包實例化變量

def longthing = 'A for B with C in D on E' 
//eg shopping for 30 mins with Fiona in Birmingham on Friday at 15:00 
def breaks = [" on ", " in ", "with ", " for "] 
def vary = ['when', 'place', 'with', 'event'] 

i = 0 
line = place = with = event = "" 
breaks.each{ 
shortline = longthing.split(breaks[i]) 
longthing= shortline[0] 
//this is the line which obviously will not work 
${vary[i]} = shortline[1] 
rez[i] = shortline[1] 
i++ 
} 
return place + "; " + with + "; " + event 
// looking for answer of D; C; B

編輯>>

是的，我試圖找到收拾這個，這是我在每個循環後做了更巧妙的方式

len = rez[3].trim() 
if(len.contains("all")){ 
len = "all" 
} else if (len.contains(" ")){ 
len = len.substring(0, len.indexOf(" ")+2) 
} 
len = len.replaceAll(" ", "") 
with = rez[2].trim() 
place = rez[1].trim() 
when = rez[0].trim() 
event = shortline[0]

，如果我決定到另一個項目添加到列表（我只是這樣做）我必須記住其中[I]它是成功地提取它

這是再解析日期/次，然後用jChronic自然文本轉換成公曆信息，所以我就可以在谷歌日曆設置一個事件，工人的部分

來源

2010-12-06 john renfrew

我重讀了你的問題，我不明白你在做什麼。我認爲我的答案會對你有所幫助，但如果你能舉一個你的手術結果的例子，我會更有幫助。 – hvgotcodes 2010-12-06 15:39:58

如何：

def longthing = 'A for B with C in D on E' 
def breaks = [" on ", " in ", "with ", " for "] 
def vary = ['when', 'place', 'with', 'event'] 
rez = [] 
line = place = with = event = "" 

breaks.eachWithIndex{ b, i -> 
    shortline = longthing.split(b) 
    longthing = shortline[0] 
    this[vary[i]] = shortline[1] 
    rez[i] = shortline[1] 
} 
return place + "; " + with + "; " + event

來源

2010-12-06 16:36:20 btiernay

Fab ...我失蹤的一點是這[[vary] [i]] - 謝謝 – 2010-12-06 16:48:38

當你使用帶有List和「each」的閉包時，groovy遍歷List中的元素，將值放入列表中的「it」變量中。不過，既然你也想保持指數的跟蹤，有可能也通過在索引中的常規eachWithIndex

http://groovy.codehaus.org/GDK+Extensions+to+Object

所以像

breaks.eachWithIndex {item, index -> 
    ... code here ... 
}

來源

2010-12-06 15:23:57 hvgotcodes

常規閉包實例化變量

回答

相關問題