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mathjs/src/function/arithmetic/unaryPlus.js at develop · webdeb/mathjs · GitHub
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mathjs
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src
/
function
/
arithmetic
/
unaryPlus.js
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mathjs
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function
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unaryPlus.js
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import
{
factory
}
from
'../../utils/factory.js'
import
{
deepMap
}
from
'../../utils/collection.js'
import
{
unaryPlusNumber
}
from
'../../plain/number/index.js'
const
name
=
'unaryPlus'
const
dependencies
=
[
'typed'
,
'config'
,
'BigNumber'
]
export
const
createUnaryPlus
=
/* #__PURE__ */
factory
(
name
,
dependencies
,
(
{
typed
,
config
,
BigNumber
}
)
=>
{
/**
* Unary plus operation.
* Boolean values and strings will be converted to a number, numeric values will be returned as is.
*
* For matrices, the function is evaluated element wise.
*
* Syntax:
*
* math.unaryPlus(x)
*
* Examples:
*
* math.unaryPlus(3.5) // returns 3.5
* math.unaryPlus(1) // returns 1
*
* See also:
*
* unaryMinus, add, subtract
*
*
@param
{
number | BigNumber | Fraction | string | Complex | Unit | Array | Matrix
} x
* Input value
*
@return
{
number | BigNumber | Fraction | Complex | Unit | Array | Matrix
}
* Returns the input value when numeric, converts to a number when input is non-numeric.
*/
return
typed
(
name
,
{
number
:
unaryPlusNumber
,
Complex
:
function
(
x
)
{
return
x
// complex numbers are immutable
}
,
BigNumber
:
function
(
x
)
{
return
x
// bignumbers are immutable
}
,
Fraction
:
function
(
x
)
{
return
x
// fractions are immutable
}
,
Unit
:
function
(
x
)
{
return
x
.
clone
(
)
}
,
// deep map collection, skip zeros since unaryPlus(0) = 0
'Array | Matrix'
:
typed
.
referToSelf
(
self
=>
x
=>
deepMap
(
x
,
self
,
true
)
)
,
'boolean | string'
:
function
(
x
)
{
// convert to a number or bignumber
return
(
config
.
number
===
'BigNumber'
)
?
new
BigNumber
(
+
x
)
:
+
x
}
}
)
}
)
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