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Groovy Goodness: Replace Characters in a String with CollectReplacements

· Java Zone

What every Java engineer should know about microservices: Reactive Microservices Architecture.  Brought to you in partnership with Lightbend.

We can use the collectReplacements(Closure) method to replace characters in a String. We pass a closure to the method and the closure is invoked for each character in the String value. If we return null the character is not transformed, otherwise we can return the replacement character.

def s = 'Gr00vy is gr8'

def replacement = {
    // Change 8 to eat
    if (it == '8') {
        'eat'
    // Change 0 to o
    } else if (it == '0') {
        'o'
    // Do not transform
    } else {
        null
    }
}
 

assert s.collectReplacements(replacement) == 'Groovy is great'Code written with Groovy 2.1.6

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Published at DZone with permission of Hubert Klein Ikkink, DZone MVB. See the original article here.

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