1.9 KiB
1.9 KiB
title | id | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
Vector dot product | 594810f028c0303b75339ad3 | 5 | 矢量点积 |
Description
矢量被定义为具有三个维度,由三个数字的有序集合表示:(X,Y,Z)。
任务:
Write a function that takes any numbers of vectors (arrays) as input and computes their dot product.
您的函数应在无效输入(即不同长度的向量)上返回null
。
Instructions
Tests
tests:
- text: dotProduct必须是一个函数
testString: 'assert.equal(typeof dotProduct, "function", "dotProduct must be a function");'
- text: dotProduct()必须返回null
testString: 'assert.equal(dotProduct(), null, "dotProduct() must return null");'
- text: 'dotProduct([[1],[1]])必须返回1。'
testString: 'assert.equal(dotProduct([1], [1]), 1, "dotProduct([[1], [1]]) must return 1.");'
- text: 'dotProduct([[1],[1,2]])必须返回null。'
testString: 'assert.equal(dotProduct([1], [1, 2]), null, "dotProduct([[1], [1, 2]]) must return null.");'
- text: 'dotProduct([1,3,-5],[4,-2,-1])必须返回3。'
testString: 'assert.equal(dotProduct([1, 3, -5], [4, -2, -1]), 3, "dotProduct([1, 3, -5], [4, -2, -1]) must return 3.");'
- text: <code>dotProduct(...nVectors)</code>应该返回<code>dotProduct(...nVectors)</code>
testString: 'assert.equal(dotProduct([ 0, 1, 2, 3, 4 ], [ 0, 2, 4, 6, 8 ], [ 0, 3, 6, 9, 12 ], [ 0, 4, 8, 12, 16 ], [ 0, 5, 10, 15, 20 ]), 156000, "<code>dotProduct(...nVectors)</code> should return 156000");'
Challenge Seed
function dotProduct() {
// Good luck!
}
Solution
// solution required