3.2 KiB
3.2 KiB
title | id | challengeType |
---|---|---|
Comma quibbling | 596e414344c3b2872167f0fe | 5 |
Description
- An input of no words produces the output string of just the two brace characters "{}".
- An input of just one word, e.g. ["ABC"], produces the output string of the word inside the two braces, e.g. "{ABC}".
- An input of two words, e.g. ["ABC", "DEF"], produces the output string of the two words inside the two braces with the words separated by the string " and ", e.g. "{ABC and DEF}".
- An input of three or more words, e.g. ["ABC", "DEF", "G", "H"], produces the output string of all but the last word separated by ", " with the last word separated by " and " and all within braces; e.g. "{ABC, DEF, G and H}".
- [] # (No input words).
- ["ABC"]
- ["ABC", "DEF"]
- ["ABC", "DEF", "G", "H"]
Instructions
Tests
tests:
- text: <code>quibble</code> is a function.
testString: assert(typeof quibble === 'function', '<code>quibble</code> is a function.');
- text: <code>quibble(["ABC"])</code> should return a string.
testString: assert(typeof quibble(["ABC"]) === 'string', '<code>quibble(["ABC"])</code> should return a string.');
- text: <code>quibble([])</code> should return "{}".
testString: assert.equal(quibble(testCases[0]), results[0], '<code>quibble([])</code> should return "{}".');
- text: <code>quibble(["ABC"])</code> should return "{ABC}".
testString: assert.equal(quibble(testCases[1]), results[1], '<code>quibble(["ABC"])</code> should return "{ABC}".');
- text: <code>quibble(["ABC", "DEF"])</code> should return "{ABC and DEF}".
testString: assert.equal(quibble(testCases[2]), results[2], '<code>quibble(["ABC", "DEF"])</code> should return "{ABC and DEF}".');
- text: <code>quibble(["ABC", "DEF", "G", "H"])</code> should return "{ABC,DEF,G and H}".
testString: assert.equal(quibble(testCases[3]), results[3], '<code>quibble(["ABC", "DEF", "G", "H"])</code> should return "{ABC,DEF,G and H}".');
Challenge Seed
function quibble(words) {
// Good luck!
return true;
}
After Test
const testCases = [[], ["ABC"], ["ABC", "DEF"], ["ABC", "DEF", "G", "H"]];
const results = ["{}", "{ABC}", "{ABC and DEF}", "{ABC,DEF,G and H}"];
Solution
function quibble(words) {
return "{" +
words.slice(0, words.length - 1).join(",") +
(words.length > 1 ? " and " : "") +
(words[words.length - 1] || '') +
"}";
}