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fix(challenges): Add tests and solution for Euler Problem 10 (#16431)

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Added tests and working solution for Euler Problem 10.
This commit is contained in:
Kristofer Koishigawa
2018-01-15 15:07:56 +09:00
committed by mrugesh mohapatra
parent c79068e058
commit cdd9c54192
1 changed files with 8 additions and 5 deletions
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13
challenges/08-coding-interview-questions-and-take-home-assignments/project-euler-problems.json
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@ -278,21 +278,24 @@
"type": "bonfire", "type": "bonfire",
"title": "Problem 10: Summation of primes", "title": "Problem 10: Summation of primes",
"tests": [ "tests": [
"assert.strictEqual(euler10(), 142913828922, 'message: <code>euler10()</code> should return 142913828922.');" "assert.strictEqual(primeSummation(17), 41, 'message: <code>primeSummation(17)</code> should return 41.');",
"assert.strictEqual(primeSummation(2001), 277050, 'message: <code>primeSummation(2001)</code> should return 277050.');",
"assert.strictEqual(primeSummation(140759), 873608362, 'message: <code>primeSummation(140759)</code> should return 873608362.');",
"assert.strictEqual(primeSummation(2000000), 142913828922, 'message: <code>primeSummation(2000000)</code> should return 142913828922.');"
], ],
"solutions": [], "solutions": ["//noprotect\nfunction primeSummation(n) {\n // Initialise an array containing only prime numbers\n let primes = [2];\n let result = 2;\n\n function isPrime(y, primes) {\n // Find sqrt(y)\n const sqrt = Math.floor(Math.sqrt(y));\n\n // Divide y by each applicable prime, return false if any of them divide y\n for (let i = 0; i < primes.length && primes[i] <= sqrt; i++) {\n if (y % primes[i] === 0) {\n return false;\n }\n }\n\n // At this point x must be prime\n return true;\n }\n\n // For every odd integer, add it to the array if it is prime\n for (let x = 3; x < n; x += 2) {\n if (isPrime(x, primes)) {\n if (x > n) {\n return result;\n } else {\n result += x;\n primes.push(x);\n }\n }\n }\n\n return result;\n}"],
"translations": {}, "translations": {},
"challengeSeed": [ "challengeSeed": [
"function euler10() {", "function primeSummation(n) {",
" // Good luck!", " // Good luck!",
" return true;", " return true;",
"}", "}",
"", "",
"euler10();" "primeSummation(2000000);"
], ],
"description": [ "description": [
"The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.", "The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.",
"Find the sum of all the primes below two million." "Find the sum of all the primes below n."
] ]
}, },
{ {