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Merge pull request #1368 from Ribeiro/master

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Added The Elvis Operator to Groovy docs - Issue #1181
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ven
2015-10-06 22:07:57 +02:00
parent a8621d1aad 35ba352668
commit 55c80f2552
1 changed files with 9 additions and 4 deletions
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groovy.html.markdown
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@@ -99,7 +99,7 @@ technologies.sort()
// To sort without mutating original, you can do: // To sort without mutating original, you can do:
sortedTechnologies = technologies.sort( false ) sortedTechnologies = technologies.sort( false )
/*** Manipulating Lists ***/ /*** Manipulating Lists ***/e
//Replace all elements in the list //Replace all elements in the list
Collections.replaceAll(technologies, 'Gradle', 'gradle') Collections.replaceAll(technologies, 'Gradle', 'gradle')
@@ -200,6 +200,14 @@ def y = 10
def x = (y > 1) ? "worked" : "failed" def x = (y > 1) ? "worked" : "failed"
assert x == "worked" assert x == "worked"
//Groovy supports 'The Elvis Operator' too!
//Instead of using the ternary operator:
displayName = user.name ? user.name : 'Anonymous'
//We can write it:
displayName = user.name ?: 'Anonymous'
//For loop //For loop
//Iterate over a range //Iterate over a range
def x = 0 def x = 0
@@ -422,6 +430,3 @@ Join a [Groovy user group](http://www.groovy-lang.org/usergroups.html)
[1] http://roshandawrani.wordpress.com/2010/10/18/groovy-new-feature-closures-can-now-memorize-their-results/ [1] http://roshandawrani.wordpress.com/2010/10/18/groovy-new-feature-closures-can-now-memorize-their-results/
[2] http://www.solutionsiq.com/resources/agileiq-blog/bid/72880/Programming-with-Groovy-Trampoline-and-Memoize [2] http://www.solutionsiq.com/resources/agileiq-blog/bid/72880/Programming-with-Groovy-Trampoline-and-Memoize
[3] http://mrhaki.blogspot.mx/2011/05/groovy-goodness-cache-closure-results.html [3] http://mrhaki.blogspot.mx/2011/05/groovy-goodness-cache-closure-results.html