Palindrome detection: Difference between revisions
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R will assume an infinite recursion if a recursion nests deeper than 5,000.
Options may be set in the environment to increase this to 500,000.
<lang
if ( nchar(p) == 1 ) {
return(TRUE)
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'''Iterative'''
<lang
for(i in 1:floor(nchar(p)/2) ) {
r <- nchar(p) - i + 1
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Note that this method incorrectly regards an empty string as not a palindrome.
Please leave this bug in the code, and take a look a the [[Testing_a_Function]] page.
<lang
return(
paste(
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Unicode is supported, but this ignores the "inexact palindromes" extra credit requirement because, without some sort of regex, supporting Unicode while stripping punctuation and white space is hard in R.
<lang
{
characters<-unlist(strsplit(string,""))
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