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02 Mar 09
InfoQ: What's New in Groovy 1.6
icro-benchmarks obviously rarely reflect the kind of code you have in your own projects, but the overal performa
04 Jul 08
Groovy - Embedding a Groovy Console in a Java Server Application
ere to run groovysh on it's own:
21 Nov 07
Groovy - Tutorial 4 - Regular expressions basics
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the simplest expression involving a regular expression uses the ==~ operator. So for example to match Dan Quayle's spelling of 'potato':
"potatoe" ==~ /potatoe/
建議Groovy1.0 暫時不要在多線程環境下使用GroovyScriptEngine - Agile - BlogBus.com
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晚上壞消息傳來了，同事把我剛提交的代碼更新到生產機上了，發現在執行Groovy腳本時經常出現 ConcurrentModificationException 異常，Google 一下，已經有相同命運的人提交了這個問題，看來是Groovy 實現的問題。下載Groovy源碼，找到GroovyScriptEngine，在Eclipse裡debug，發現問題所在了，updateCacheEntry方法的實現有問題，沒有適當的加鎖保護，造成對Map迭代時發生ConcurrentModificationException 異常了。
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另外發現updateCacheEntry每回執行的時候都會被調用，都要求執行一段同步塊兒的代碼，真讓人擔心這個效率問題。
Groovy - Regular Expressions
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Groovy supports regular expressions natively using the ~"pattern" expression
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Groovy also supports the =~ (create Matcher) and ==~ (matches regex) operators.
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14 Jun 07
Groovy - Groovy Categories
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There are many situations where you might find that it would be useful if a class not under your control had additional methods that you define. In order to enable this capability, Groovy implements a feature borrowed from Objective-C , called Categories.
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import groovy.xml.*
def html = DOMBuilder.newInstance().html {
head {
title (class:'mytitle', 'Test')
}
body {
p (class:'mystyle', 'This is a test.')
}
}
use (groovy.xml.dom.DOMCategory.class) {
assert html.head.title.text() == 'Test'
assert html.body.p.text() == 'This is a test.'
assert html.find{ it.tagName == 'body' }.tagName == 'body'
assert html.getElementsByTagName('*').grep{ it.'@class' }.size() == 2
}
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