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peysal/introduction6.groovy

Created August 25, 2013 10:28
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  1. peysal created this gist Aug 25, 2013.
    21 changes: 21 additions & 0 deletions introduction6.groovy
    View file
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    def emptyMap = [:]
    assert emptyMap.size() == 0
    def notEmptyMap = ["person1":"john", "person2":"mus"]
    assert notEmptyMap.size() == 2

    notEmptyMap.put "person3","test" //adding to existing one
    assert notEmptyMap.size() == 3
    notEmptyMap["person4"] = "beth"
    assert notEmptyMap.size() == 4

    assert notEmptyMap.get("person1") == "john" //accessing the value
    assert notEmptyMap.person1 == "john"
    assert notEmptyMap["person1"] == "john"

    notEmptyMap.each{ k,v -> println "key=${k}: value=${v}"} //iterating
    notEmptyMap.each{ it -> println "key=${it.key}:value${it.value}"}

    def toBeRemove = ["person3" :"oh","person4":"la"]
    assert toBeRemove.each{it -> notEmptyMap.remove(it.key) }.size() == 2
    notEmptyMap += toBeRemove //concat
    assert notEmptyMap.size() == 4