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| var assert = require('assert'); | |
| /******************************** | |
| * We want make a package of goal kilos of chocolate. We have | |
| * inventory of small bars (1 kilos each) and big bars (5 kilos each). | |
| * Return the number of small bars to use, assuming we always | |
| * use big bars before small bars. Return -1 if it can't be done. | |
| * | |
| * See the asserts below for examples of input | |
| * and expected output. | |
| * | |
| * If you have node installed, all you need to do to test | |
| * your code is run: `node chocolate.js`. If you see errors, | |
| * it is because the tests below did not pass. Once the | |
| * tests do pass, you will see a log of `Success!` | |
| * | |
| * YOUR CODE BELOW HERE | |
| ********************************/ | |
| function makeChocolate(small, big, goal) { | |
| // Constant sizes | |
| var BIGKG = 5, SMALLKG = 1; | |
| // Accumulators | |
| var bigsNeeded = 0, smallsNeeded = 0; | |
| // Check to see that we have enough chocolate to meet the goal | |
| if ((small * SMALLKG) + (big * BIGKG) < goal) { | |
| return -1; // we don't have enough chocolate! | |
| } | |
| while (goal > 0) { | |
| if (goal / BIGKG >= 1 && big > 0) { | |
| goal -= BIGKG; | |
| bigsNeeded ++; | |
| big --; | |
| } | |
| else if (goal / SMALLKG >= 1 && small > 0) { | |
| goal -= SMALLKG; | |
| smallsNeeded ++; | |
| small --; | |
| } | |
| } | |
| // sanity check | |
| if (goal !== 0) { | |
| throw new Error('something went wrong'); | |
| } | |
| return smallsNeeded; | |
| } | |
| /******************************** | |
| * YOUR CODE ABOVE HERE | |
| ********************************/ | |
| assert.equal( | |
| makeChocolate(4, 1, 9), | |
| 4 | |
| ); | |
| assert.equal( | |
| makeChocolate(4, 1, 10), | |
| -1 | |
| ); | |
| assert.equal( | |
| makeChocolate(4, 1, 7), | |
| 2 | |
| ); | |
| assert.equal( | |
| makeChocolate(6, 2, 7), | |
| 2 | |
| ); | |
| assert.equal( | |
| makeChocolate(4, 1, 5), | |
| 0 | |
| ); | |
| assert.equal( | |
| makeChocolate(4, 1, 4), | |
| 4 | |
| ); | |
| assert.equal( | |
| makeChocolate(5, 4, 9), | |
| 4 | |
| ); | |
| assert.equal( | |
| makeChocolate(9, 3, 18), | |
| 3 | |
| ); | |
| console.log('Success!'); |
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| var assert = require('assert'); | |
| /******************************** | |
| * Return true if the array contains, somewhere, three increasing | |
| * adjacent numbers like .... 4, 5, 6, ... or 23, 24, 25. | |
| * | |
| * See the asserts below for examples of input | |
| * and expected output. | |
| * | |
| * If you have node installed, all you need to do to test | |
| * your code is run: `node tripleUp.js`. If you see errors, | |
| * it is because the tests below did not pass. Once the | |
| * tests do pass, you will see a log of `Success!` | |
| * | |
| * YOUR CODE BELOW HERE | |
| ********************************/ | |
| function tripleUp(array) { | |
| for (var i = 0; i < array.length - 2; i ++) { | |
| // Look ahead at the next two numbers to check for a sequence | |
| if ((array[i] === array[i + 1] - 1) && (array[i] === array[i + 2] -2)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| /******************************** | |
| * YOUR CODE ABOVE HERE | |
| ********************************/ | |
| assert.equal( | |
| tripleUp([1, 4, 5, 6, 2]), | |
| true | |
| ); | |
| assert.equal( | |
| tripleUp([1, 2, 3]), | |
| true | |
| ); | |
| assert.equal( | |
| tripleUp([1, 2, 4, 5, 7, 6, 5, 6, 7, 6]), | |
| true | |
| ); | |
| assert.equal( | |
| tripleUp([1, 2, 4, 5, 7, 6, 5, 7, 7, 6]), | |
| false | |
| ); | |
| assert.equal( | |
| tripleUp([1,2]), | |
| false | |
| ); | |
| assert.equal( | |
| tripleUp([10, 9, 8, -100, -99, -98, 100]), | |
| true | |
| ); | |
| assert.equal( | |
| tripleUp([10, 9, 8, -100, -99, 99, 100]), | |
| false | |
| ); | |
| console.log('Success!'); |
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