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给定一个数，获取和为这个数的组合并输出
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| <!doctype HTML> | |
| <head> | |
| <style> | |
| .green { | |
| color: green; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='numbers'></div> | |
| </body> | |
| <script> | |
| // Math.floor(Math.random() * (max - min)) + min; | |
| var get_ratio = function (num) { | |
| var i = 0, | |
| j = num; | |
| var l = []; | |
| while (i < (num - 1)) { | |
| l.push(Math.random()) | |
| i++; | |
| } | |
| l = l.concat([0, 1]).sort() | |
| // console.log(l); | |
| var d = []; | |
| while (j >= 0) { | |
| if (!isNaN(l[j - 1])) { | |
| d.push(l[j] - l[j - 1]) | |
| } | |
| j-- | |
| } | |
| return d | |
| } | |
| var get_piece = function (cake, rates) { | |
| return rates.map(function (r) { | |
| return (r * cake) | |
| }) | |
| } | |
| var condition = function (pieces, min, max) { | |
| for (var i in pieces) { | |
| console.log(pieces[i], typeof pieces[i], min, max) | |
| if (pieces[i] < min || pieces[i] > max) { | |
| return false | |
| } | |
| } | |
| return true; | |
| } | |
| var i = 1000000, pieces = []; | |
| while (i > 0) { | |
| i--; | |
| pieces = get_piece(117239.42, get_ratio(13)) | |
| var isvalid = condition(pieces, 5000, 15000); | |
| if (isvalid) { | |
| document.write('<div class="green">' + pieces.map(a => a.toFixed(2)).join(', ') + '</div>') | |
| document.write('<br/>') | |
| } else { | |
| // document.write('<div >' + pieces.map(a => a.toFixed(2)).join(', ') + '</div>') | |
| // document.write('<br/>') | |
| } | |
| } | |
| alert('done') | |
| </script> |
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