forked from josdejong/mathjs
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fix.js
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fix.js
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import { factory } from '../../utils/factory'
import { deepMap } from '../../utils/collection'
import { createAlgorithm14 } from '../../type/matrix/utils/algorithm14'
const name = 'fix'
const dependencies = ['typed', 'Complex', 'matrix', 'ceil', 'floor']
export const createFix = /* #__PURE__ */ factory(name, dependencies, ({ typed, Complex, matrix, ceil, floor }) => {
const algorithm14 = createAlgorithm14({ typed })
/**
* Round a value towards zero.
* For matrices, the function is evaluated element wise.
*
* Syntax:
*
* math.fix(x)
*
* Examples:
*
* math.fix(3.2) // returns number 3
* math.fix(3.8) // returns number 3
* math.fix(-4.2) // returns number -4
* math.fix(-4.7) // returns number -4
*
* math.fix(3.12, 1) // returns number 3.1
* math.fix(3.18, 1) // returns number 3.1
* math.fix(-4.12, 1) // returns number -4.1
* math.fix(-4.17, 1) // returns number -4.1
*
* const c = math.complex(3.22, -2.78)
* math.fix(c) // returns Complex 3 - 2i
* math.fix(c, 1) // returns Complex 3.2 - 2.7i
*
* math.fix([3.2, 3.8, -4.7]) // returns Array [3, 3, -4]
* math.fix([3.2, 3.8, -4.7], 1) // returns Array [3.2, 3.8, -4.7]
*
* See also:
*
* ceil, floor, round
*
* @param {number | BigNumber | Fraction | Complex | Array | Matrix} x Number to be rounded
* @param {number | BigNumber | Array} [n=0] Number of decimals
* @return {number | BigNumber | Fraction | Complex | Array | Matrix} Rounded value
*/
return typed('fix', {
number: function (x) {
return (x > 0) ? floor(x) : ceil(x)
},
'number, number | BigNumber': function (x, n) {
return (x > 0) ? floor(x, n) : ceil(x, n)
},
Complex: function (x) {
return new Complex(
(x.re > 0) ? Math.floor(x.re) : Math.ceil(x.re),
(x.im > 0) ? Math.floor(x.im) : Math.ceil(x.im)
)
},
'Complex, number | BigNumber': function (x, n) {
return new Complex(
(x.re > 0) ? floor(x.re, n) : ceil(x.re, n),
(x.im > 0) ? floor(x.im, n) : ceil(x.im, n)
)
},
BigNumber: function (x) {
return x.isNegative() ? ceil(x) : floor(x)
},
'BigNumber, number | BigNumber': function (x, n) {
return x.isNegative() ? ceil(x, n) : floor(x, n)
},
Fraction: function (x) {
return x.s < 0 ? x.ceil() : x.floor()
},
'Fraction, number | BigNumber': function (x, n) {
return x.s < 0 ? x.ceil(n) : x.floor(n)
},
'Array | Matrix': function (x) {
// deep map collection, skip zeros since fix(0) = 0
return deepMap(x, this, true)
},
'Array | Matrix, number | BigNumber': function (x, n) {
// deep map collection, skip zeros since fix(0) = 0
return deepMap(x, i => this(i, n), true)
},
'number | Complex | BigNumber, Array': function (x, y) {
// use matrix implementation
return algorithm14(matrix(y), x, this, true).valueOf()
}
})
})