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#!/usr/bin/env node
// ch-2.js
/**
* https://theweeklychallenge.org/blog/perl-weekly-challenge-131/
*
* Task 2 > Find Pairs
* ===================
*
* You are given a string of delimiter pairs and a string to search.
*
* Write a script to return two strings the first with any characters matching
* the "opening character" set, the second with any matching the "closing
* character" set.
*
* Example 1:
*
* Input:
*
* Delimiter pairs: ""[]()
*
* Search String: "I like (parens) and the Apple ][+" they said.
*
* Output:
*
* "(["
*
* "])"
*
* Example 2:
*
* Input:
*
* Delimiter pairs: ** //<>
*
* Search String: /* This is a comment (in some languages) * / <could be a tag>
*
* Output:
* /** /<
* /** />
**/
'use strict';
/**
* Node built-in dependencies
**/
const readline = require('readline');
/**
* Here, our Find Pairs function (PWC Solution)
**/
function findPairs(delimiters = '', string = '') {
const [openSet, closeSet] = [...delimiters].reduce(
([open, close], el, idx) => {
if (idx % 2) return [open, [...close, el]];
return [[...open, el], close];
},
[[], []]
);
return [...string].reduce(
([open, close], el) => {
if (openSet.includes(el)) open.push(el);
if (closeSet.includes(el)) close.push(el);
return [open, close];
},
[[], []]
);
}
/**
* Utilities
**/
function printResults(results = [[]]) {
results.forEach(result => {
console.log(result.join(''));
});
}
/**
* And our CLI
**/
(function main() {
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
function run() {
console.log('Welcome to delimiter search (type "exit" or Ctrl+c to quit).');
rl.question('Please provide delimiter string (ie: []{}**): ', (delims) => {
if (delims.trim() === 'exit') process.exit(0);
rl.question('Please provide search string: ', (string) => {
if (string.trim() === 'exit') process.exit(0);
console.log('Results: ');
printResults(findPairs(delims.trim(), string));
run();
});
});
}
run();
})();
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