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http://www.freecodecamp.com/vmlinz 's solution for Bonfire: Exact Change
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| // Bonfire: Exact Change | |
| // Author: @vmlinz | |
| // Challenge: http://www.freecodecamp.com/challenges/bonfire-exact-change?solution=function%20drawer(price%2C%20cash%2C%20cid)%20%7B%0A%20%20var%20cashes%20%3D%20%5B%5B%22PENNY%22%2C%200.01%5D%2C%20%5B%22NICKEL%22%2C%200.05%5D%2C%20%5B%22DIME%22%2C%200.10%5D%2C%20%5B%22QUARTER%22%2C%200.25%5D%2C%20%5B%22ONE%22%2C%201.00%5D%2C%20%5B%22FIVE%22%2C%205.00%5D%2C%20%5B%22TEN%22%2C%2010.00%5D%2C%20%5B%22TWENTY%22%2C%2020.00%5D%2C%20%5B%22ONE%20HUNDRED%22%2C%20100.00%5D%5D.reduce(function%20(hash%2C%20elem%2C%20index)%20%7B%0A%20%20%20%20hash%5Belem%5B0%5D%5D%20%3D%20elem%5B1%5D%3B%0A%20%20%20%20return%20hash%3B%0A%20%20%7D%2C%20%7B%7D)%3B%0A%20%20var%20change%3B%0A%20%20%2F%2F%20Here%20is%20your%20change%2C%20ma%27am.%0A%20%20var%20result%20%3D%20cash%20-%20price%3B%0A%20%20var%20total%20%3D%20cid.reduce(function%20(p%2C%20c)%20%7B%0A%20%20%20%20return%20p%20%2B%20c%5B1%5D%3B%0A%20%20%7D%2C%200.0).toFixed(2)%3B%0A%0A%20%20if%20(result%20%3E%20total)%0A%20%20%20%20return%20%22Insufficient%20Funds%22%3B%0A%20%20else%20if%20(result.toFixed(2)%20%3D%3D%3D%20total)%0A%20%20%20%20return%20%22Closed%22%3B%0A%0A%20%20change%20%3D%20cid.reverse().reduce(function%20(p%2C%20c)%20%7B%0A%20%20%20%20if%20(result%20%3E%20cashes%5Bc%5B0%5D%5D)%20%7B%0A%20%20%20%20%20%20%2F%2F%201.%20get%20the%20change%20needed%20for%20this%20round%0A%20%20%20%20%20%20var%20needed_change%20%3D%20result%20-%20result%20%25%20cashes%5Bc%5B0%5D%5D%3B%0A%20%20%20%20%20%20%2F%2F%202.%20get%20the%20minimal%20change%20from%20needed%20and%20maximium%20of%20cash%20available%0A%20%20%20%20%20%20var%20current_change%20%3D%20needed_change%20%3C%20c%5B1%5D%20%3F%20needed_change%20%3A%20c%5B1%5D%3B%0A%20%20%20%20%20%20%2F%2F%203.%20get%20the%20rest%20needed%20to%20calculate%20changes%0A%20%20%20%20%20%20result%20%3D%20Math.round((result%20-%20current_change)%20*%20100.0)%20%2F%20100%3B%0A%20%20%20%20%20%20%2F%2F%204.%20push%20current%20change%20to%20the%20out%20result%0A%20%20%20%20%20%20p.push(%5Bc%5B0%5D%2C%20current_change%5D)%3B%0A%20%20%20%20%20%20console.log(needed_change%2C%20current_change%2C%20result)%3B%0A%20%20%20%20%20%20return%20p%3B%0A%20%20%20%20%7D%0A%20%20%20%20else%0A%20%20%20%20%20%20return%20p%3B%0A%20%20%7D%2C%20%5B%5D)%3B%0A%0A%20%20console.log(result.toFixed(2)%2C%20total%2C%20change)%3B%0A%0A%20%20if%20(result.toFixed(2)%20!%3D%3D%20%270.00%27)%0A%20%20%20%20return%20%22Insufficient%20Funds%22%3B%0A%0A%20%20return%20change%3B%0A%7D%0A%2F%2F%20Example%20cash-in-drawer%20array%3A%0A%2F%2F%20%5B%5B%22PENNY%22%2C%201.01%5D%2C%0A%2F%2F%20%5B%22NICKEL%22%2C%202.05%5D%2C%0A%2F%2F%20%5B%22DIME%22%2C%203.10%5D%2C%0A%2F%2F%20%5B%22QUARTER%22%2C%204.25%5D%2C%0A%2F%2F%20%5B%22ONE%22%2C%2090.00%5D%2C%0A%2F%2F%20%5B%22FIVE%22%2C%2055.00%5D%2C%0A%2F%2F%20%5B%22TEN%22%2C%2020.00%5D%2C%0A%2F%2F%20%5B%22TWENTY%22%2C%2060.00%5D%2C%0A%2F%2F%20%5B%22ONE%20HUNDRED%22%2C%20100.00%5D%5D%0A%0Adrawer(19.50%2C%2020.00%2C%20%5B%5B%22PENNY%22%2C%201.01%5D%2C%20%5B%22NICKEL%22%2C%202.05%5D%2C%20%5B%22DIME%22%2C%203.10%5D%2C%20%5B%22QUARTER%22%2C%204.25%5D%2C%20%5B%22ONE%22%2C%2090.00%5D%2C%20%5B%22FIVE%22%2C%2055.00%5D%2C%20%5B%22TEN%22%2C%2020.00%5D%2C%20%5B%22TWENTY%22%2C%2060.00%5D%2C%20%5B%22ONE%20HUNDRED%22%2C%20100.00%5D%5D)%3B%0A | |
| // Learn to Code at Free Code Camp (www.freecodecamp.com) | |
| function drawer(price, cash, cid) { | |
| var cashes = [["PENNY", 0.01], ["NICKEL", 0.05], ["DIME", 0.10], ["QUARTER", 0.25], ["ONE", 1.00], ["FIVE", 5.00], ["TEN", 10.00], ["TWENTY", 20.00], ["ONE HUNDRED", 100.00]].reduce(function (hash, elem, index) { | |
| hash[elem[0]] = elem[1]; | |
| return hash; | |
| }, {}); | |
| var change; | |
| // Here is your change, ma'am. | |
| var result = cash - price; | |
| var total = cid.reduce(function (p, c) { | |
| return p + c[1]; | |
| }, 0.0).toFixed(2); | |
| if (result > total) | |
| return "Insufficient Funds"; | |
| else if (result.toFixed(2) === total) | |
| return "Closed"; | |
| change = cid.reverse().reduce(function (p, c) { | |
| if (result > cashes[c[0]]) { | |
| // 1. get the change needed for this round | |
| var needed_change = result - result % cashes[c[0]]; | |
| // 2. get the minimal change from needed and maximium of cash available | |
| var current_change = needed_change < c[1] ? needed_change : c[1]; | |
| // 3. get the rest needed to calculate changes | |
| result = Math.round((result - current_change) * 100.0) / 100; | |
| // 4. push current change to the out result | |
| p.push([c[0], current_change]); | |
| console.log(needed_change, current_change, result); | |
| return p; | |
| } | |
| else | |
| return p; | |
| }, []); | |
| console.log(result.toFixed(2), total, change); | |
| if (result.toFixed(2) !== '0.00') | |
| return "Insufficient Funds"; | |
| return change; | |
| } | |
| // Example cash-in-drawer array: | |
| // [["PENNY", 1.01], | |
| // ["NICKEL", 2.05], | |
| // ["DIME", 3.10], | |
| // ["QUARTER", 4.25], | |
| // ["ONE", 90.00], | |
| // ["FIVE", 55.00], | |
| // ["TEN", 20.00], | |
| // ["TWENTY", 60.00], | |
| // ["ONE HUNDRED", 100.00]] | |
| drawer(19.50, 20.00, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.10], ["QUARTER", 4.25], ["ONE", 90.00], ["FIVE", 55.00], ["TEN", 20.00], ["TWENTY", 60.00], ["ONE HUNDRED", 100.00]]); |
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