mirror of
https://github.com/josdejong/mathjs.git
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c5971b371a
* chore(package): update standard to version 12.0.0
* update to new lint version with --fix
I believe this mainly adds whitespace to `{}`'s.
* Replace assert.equal with assert.strictEqual
This breaks a lot of tests which I will endevour to fix in the next
commits.
* Fix most errors due to assert.strictEquals
Some instances of `strictEquals` are replaced by `deepEquals`.
`toString` has been used to make some string comparisions explicit.
Tests will still fail untill #1236 and #1237 are fixed.
* Fix assertion erros due to -0
With node 10, assert.strictEqual no longer considers `0 === -0`.
I missed these first time round as I was using node 8.
* Put toString correct side of bracket
I was converting the constructor to a string rather
than the result of the computation. Oops.
* Fixed #1236: quantileSeq has inconsistant return
* Update package-lock
* Fixed #1237: norm sometimes returning a complex number instead of number
* Fix cli tests
* More changes for standardjs, and fixes in unit tests
71 lines
2.3 KiB
JavaScript
71 lines
2.3 KiB
JavaScript
// Fractions
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// load math.js (using node.js)
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const math = require('../index')
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// configure the default type of numbers as Fractions
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math.config({
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number: 'Fraction' // Default type of number:
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// 'number' (default), 'BigNumber', or 'Fraction'
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})
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console.log('basic usage')
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printRatio(math.fraction(0.125)) // Fraction, 1/8
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printRatio(math.fraction(0.32)) // Fraction, 8/25
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printRatio(math.fraction('1/3')) // Fraction, 1/3
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printRatio(math.fraction('0.(3)')) // Fraction, 1/3
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printRatio(math.fraction(2, 3)) // Fraction, 2/3
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printRatio(math.fraction('0.(285714)')) // Fraction, 2/7
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console.log()
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console.log('round-off errors with numbers')
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print(math.add(0.1, 0.2)) // number, 0.30000000000000004
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print(math.divide(0.3, 0.2)) // number, 1.4999999999999998
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console.log()
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console.log('no round-off errors with fractions :)')
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print(math.add(math.fraction(0.1), math.fraction(0.2))) // Fraction, 0.3
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print(math.divide(math.fraction(0.3), math.fraction(0.2))) // Fraction, 1.5
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console.log()
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console.log('represent an infinite number of repeating digits')
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print(math.fraction('1/3')) // Fraction, 0.(3)
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print(math.fraction('2/7')) // Fraction, 0.(285714)
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print(math.fraction('23/11')) // Fraction, 2.(09)
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console.log()
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// one can work conveniently with fractions using the expression parser.
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// note though that Fractions are only supported by basic arithmetic functions
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console.log('use fractions in the expression parser')
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printRatio(math.eval('0.1 + 0.2')) // Fraction, 3/10
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printRatio(math.eval('0.3 / 0.2')) // Fraction, 3/2
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printRatio(math.eval('23 / 11')) // Fraction, 23/11
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console.log()
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// output formatting
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console.log('output formatting of fractions')
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const a = math.fraction('2/3')
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console.log(math.format(a)) // Fraction, 2/3
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console.log(math.format(a, { fraction: 'ratio' })) // Fraction, 2/3
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console.log(math.format(a, { fraction: 'decimal' })) // Fraction, 0.(6)
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console.log(a.toString()) // Fraction, 0.(6)
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console.log()
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/**
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* Helper function to output a value in the console.
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* Fractions will be formatted as ratio, like '1/3'.
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* @param {*} value
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*/
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function printRatio (value) {
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console.log(math.format(value, { fraction: 'ratio' }))
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}
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/**
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* Helper function to output a value in the console.
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* Fractions will be formatted as decimal, like '0.(3)'.
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* @param {*} value
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*/
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function print (value) {
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console.log(math.format(value, { fraction: 'decimal' }))
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}
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