CODEWITHSUNDEEP
javagroovy
Joseph
Joseph

Reputation: 33

convert numbers to strings in groovy

Is there any way to convert numbers to strings in pure Groovy OR concatenate a number and a string to a string. It almost seems like you can.

For example:

def t = [:]
t['a' << 24] = "happy"
println t
println t.get('a24')

Line 3 will display something like [a24:happy] but it will not be retrievable in line 4. Changing the 2nd line to t['a24'] = "happy" displays seemingly the same print on line 3 but it actually fetches the result in the 4th line.

If I check the types on each, they both return class java.util.LinkedHashMap

So, again, is there a pure Groovy way of converting a number into a string and/or combining string + number or must it be done in Java?

Upvotes: 0

Views: 913

Answers (1)

Andreas
Andreas

Reputation: 159086

Groovy implements << by calling leftShift(), so 'a' << 24 actually calls String.leftShift(Object value), which returns a StringBuffer, not a String.

That means that your map key is a StringBuffer, so calling get('a24'), where you pass in a String, will not find anything.

You can see that by printing the type:

t.each { k, v -> println k.getClass() } // prints: class java.lang.StringBuffer

Upvotes: 2

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