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Why I cannot use string methods inside groovy closure? – no candidate for method call

May 6, 2023

I have simple hashmap and want to manipulate it but IDE does not recognize the methods. Completely new to Groovy so not sure what is wrong.

    def percentages = [
        "x1" : "20%",
        "x2" : "30%",
        "x3" : "0.4",
        "x4" : "50%",
        "x5" : "0.6"]

    percentages.each {
    val ->
         if(val[2].endsWith("%")) {
        val[2].deleteCharAt(val.length()-1)
        println val
    }
}

>Solution :

When you do percentages.each you iterate over map and each element is java.util.Map.Entry. Here is probably what you need:

import java.util.Map.Entry

def percentages = [
    "x1": "20%",
    "x2": "30%",
    "x3": "0.4",
    "x4": "50%",
    "x5": "0.6"]

percentages.each { Entry<String, String> val ->
    if (val.value.endsWith("%")) {
        val.value = val.value.substring(0, val.value.length() - 1)
        println val
    }
}