/**
* Returns the word before the last word.
* Uses Unicode-aware regex to handle international scripts.
*/
function getWordBeforeLast(text) {
// \p{L} matches any Unicode letter (works for English, Kanji, Cyrillic, etc.)
// \p{N} matches any Unicode number
// We split by anything that is NOT a letter or a number ([^\p{L}\p{N}]+)
// The 'u' flag is required to enable Unicode property support.
const words = text.split(/[^\p{L}\p{N}]+/u).filter(word => word.length > 0);
if (words.length < 2) {
return "null";
}
// Accessing the second to last element using negative indexing (ES2022+)
return words.at(-2);
}
function main() {
console.log("=== Testing: Get Word Before Last ===\n");
const tests = [
"python javascript",
" many spaces here now ",
"OneWord",
"",
" ",
"Hello, world!",
"Tabs\tand\nnewlines work too",
"Unicode 世界、こんにちは",
"Ends with punctuation.",
"Multiple words, with punctuation, here!",
"state-of-the-art program example"
];
tests.forEach(t => {
const result = getWordBeforeLast(t);
console.log(`Input: "${t}"`);
console.log(`Output: ${result}`);
console.log("-".repeat(40));
});
}
main();
/*
OUTPUT:
=== Testing: Get Word Before Last ===
Input: "python javascript"
Output: python
----------------------------------------
Input: " many spaces here now "
Output: here
----------------------------------------
Input: "OneWord"
Output: null
----------------------------------------
Input: ""
Output: null
----------------------------------------
Input: " "
Output: null
----------------------------------------
Input: "Hello, world!"
Output: Hello
----------------------------------------
Input: "Tabs and
newlines work too"
Output: work
----------------------------------------
Input: "Unicode 世界、こんにちは"
Output: 世界
----------------------------------------
Input: "Ends with punctuation."
Output: with
----------------------------------------
Input: "Multiple words, with punctuation, here!"
Output: punctuation
----------------------------------------
Input: "state-of-the-art program example"
Output: program
----------------------------------------
*/
