RosettaCodeData/Task/Formatted-numeric-output/Lambdatalk/formatted-numeric-output.lambdatalk
2023-07-01 13:44:08 -04:00

30 lines
746 B
Text

{def fmt
{def padd {lambda {:n :x} {if {< :n 1} then else :x{padd {- :n 1} :x}}}}
{def trunc {lambda {:n} {if {> :n 0} then {floor :n} else {ceil :n}}}}
{lambda {:a :b :n}
{let { {:a :a} {:b :b} {:n {abs :n}} {:sign {if {>= :n 0} then + else -}}
{:int {trunc :n}}
{:dec {ceil {* 1.0e:b {abs {- :n {trunc :n}}}}} }
} {br}{padd {- :a {W.length {trunc :n}}} >}
{if {W.equal? :sign -} then else :sign}:int.:dec{padd {- :b {W.length :dec}} 0} }}}
-> fmt
{def numbers
7.125
10.7
0.980
-1000
559.8
-69.99
4970.430}
-> numbers
{S.map {fmt 10 3} {numbers}}
->
>>>>>>>>> +7.125
>>>>>>>> +10.699
>>>>>>>>> +0.980
>>>>>> -1000.000
>>>>>>> +559.799
>>>>>>>> -69.990
>>>>>> +4970.430