made with esnextbin
Created
June 26, 2016 03:36
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esnextbin sketch
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>ESNextbin Sketch</title> | |
| <!-- put additional styles and scripts here --> | |
| </head> | |
| <body> | |
| <!-- put markup and other contents here --> | |
| </body> | |
| </html> |
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| // write ES2015 code and import modules from npm | |
| // and then press "Execute" to run your program | |
| import { expect } from 'chai' | |
| function integ(coefs) { | |
| const newCoefs = coefs.map( | |
| (coef, index) => coef / (coefs.length - index) | |
| ) | |
| return [...newCoefs, 0] | |
| } | |
| function addExp(coefs, x) { | |
| let sum = 0 | |
| const some = coefs.map((a, index) => | |
| Math.pow(x, coefs.length - index - 1) * a | |
| ) | |
| for (let e of some) { | |
| sum += e | |
| } | |
| return sum | |
| } | |
| function areaExact(coefs, a, b) { | |
| console.time('areaExact') | |
| const some = addExp(integ(coefs), b) - addExp(integ(coefs), a) | |
| console.timeEnd('areaExact') | |
| return some | |
| } | |
| function areaNumerical(coefs, delta = 1, a, b) { | |
| console.time('areaNumerical') | |
| let sum = 0 | |
| for (let i = a; i < b; i+=delta) { | |
| const comp = addExp(coefs, i) * delta; | |
| sum += comp | |
| } | |
| console.timeEnd('areaNumerical') | |
| return sum; | |
| } | |
| // expect(integ([3, 4, 5])).to.eql([1, 2, 5, 0]) | |
| // expect(addExp([1, 2, 5, 0], 3)).to.eql(60) | |
| expect(areaExact([3, 4, 5], 0, 3)).to.equal(60) | |
| expect(Math.round(areaNumerical([3, 4, 5], 0.001, 0, 3))).to.equal(60) |
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| { | |
| "name": "esnextbin-sketch", | |
| "version": "0.0.0", | |
| "dependencies": { | |
| "chai": "3.5.0", | |
| "babel-runtime": "6.9.2" | |
| } | |
| } |
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| 'use strict'; | |
| var _getIterator2 = require('babel-runtime/core-js/get-iterator'); | |
| var _getIterator3 = _interopRequireDefault(_getIterator2); | |
| var _toConsumableArray2 = require('babel-runtime/helpers/toConsumableArray'); | |
| var _toConsumableArray3 = _interopRequireDefault(_toConsumableArray2); | |
| var _chai = require('chai'); | |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } | |
| function integ(coefs) { | |
| var newCoefs = coefs.map(function (coef, index) { | |
| return coef / (coefs.length - index); | |
| }); | |
| return [].concat((0, _toConsumableArray3.default)(newCoefs), [0]); | |
| } // write ES2015 code and import modules from npm | |
| // and then press "Execute" to run your program | |
| function addExp(coefs, x) { | |
| var sum = 0; | |
| var some = coefs.map(function (a, index) { | |
| return Math.pow(x, coefs.length - index - 1) * a; | |
| }); | |
| var _iteratorNormalCompletion = true; | |
| var _didIteratorError = false; | |
| var _iteratorError = undefined; | |
| try { | |
| for (var _iterator = (0, _getIterator3.default)(some), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) { | |
| var e = _step.value; | |
| sum += e; | |
| } | |
| } catch (err) { | |
| _didIteratorError = true; | |
| _iteratorError = err; | |
| } finally { | |
| try { | |
| if (!_iteratorNormalCompletion && _iterator.return) { | |
| _iterator.return(); | |
| } | |
| } finally { | |
| if (_didIteratorError) { | |
| throw _iteratorError; | |
| } | |
| } | |
| } | |
| return sum; | |
| } | |
| function areaExact(coefs, a, b) { | |
| console.time('areaExact'); | |
| var some = addExp(integ(coefs), b) - addExp(integ(coefs), a); | |
| console.timeEnd('areaExact'); | |
| return some; | |
| } | |
| function areaNumerical(coefs) { | |
| var delta = arguments.length <= 1 || arguments[1] === undefined ? 1 : arguments[1]; | |
| var a = arguments[2]; | |
| var b = arguments[3]; | |
| console.time('areaNumerical'); | |
| var sum = 0; | |
| for (var i = a; i < b; i += delta) { | |
| var comp = addExp(coefs, i) * delta; | |
| sum += comp; | |
| } | |
| console.timeEnd('areaNumerical'); | |
| return sum; | |
| } | |
| // expect(integ([3, 4, 5])).to.eql([1, 2, 5, 0]) | |
| // expect(addExp([1, 2, 5, 0], 3)).to.eql(60) | |
| (0, _chai.expect)(areaExact([3, 4, 5], 0, 3)).to.equal(60); | |
| (0, _chai.expect)(Math.round(areaNumerical([3, 4, 5], 0.001, 0, 3))).to.equal(60); |
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