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Ozzie Gooen 2020-03-26 16:05:14 +00:00
parent e17e2aca2e
commit a0f7b94ec6
2 changed files with 0 additions and 69 deletions
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5
__tests__/math__test.js
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const foo = require('./mathtest')
test('sdf', () => {
expect(1).toBe(2)
})

64
__tests__/mathtest.js
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// This example demonstrates importing a custom data type,
// and extending an existing function (add) with support for this data type.
const { create, factory, all } = require('mathjs');
const math = create(all)
// factory function which defines a new data type FunctionalDistribution
const createFunctionalDistribution = factory('FunctionalDistribution', ['typed'], ({ typed }) => {
// create a new data type
function FunctionalDistribution (value) {
this.value = value
}
FunctionalDistribution.prototype.isFunctionalDistribution = true
FunctionalDistribution.prototype.toString = function () {
return 'FunctionalDistribution:' + this.value
}
// define a new data type with typed-function
typed.addType({
name: 'FunctionalDistribution',
test: function (x) {
// test whether x is of type FunctionalDistribution
return x && x.isFunctionalDistribution === true
}
})
return FunctionalDistribution
})
// function add which can add the FunctionalDistribution data type
// When imported in math.js, the existing function `add` with support for
// FunctionalDistribution, because both implementations are typed-functions and do not
// have conflicting signatures.
const createAddFunctionalDistribution = factory('add', ['typed', 'FunctionalDistribution'], ({ typed, FunctionalDistribution }) => {
return typed('add', {
'FunctionalDistribution, FunctionalDistribution': function (a, b) {
return new FunctionalDistribution(a.value + b.value)
}
})
})
const createSubtractFunctionalDistribution = factory('subtract', ['typed', 'FunctionalDistribution'], ({ typed, FunctionalDistribution }) => {
return typed('subtract', {
'FunctionalDistribution, FunctionalDistribution': function (a, b) {
return new FunctionalDistribution(a.value - b.value)
}
})
})
// import the new data type and function
math.import([
createFunctionalDistribution,
createAddFunctionalDistribution,
createSubtractFunctionalDistribution
])
// use the new type
const ans = math.chain(new math.FunctionalDistribution(2)).subtract(new math.FunctionalDistribution(3))
// ans = FunctionalDistribution(5)
console.log(ans.toString())
// outputs 'FunctionalDistribution:5'
module.exports = ans