How can we convert a list to an integer correctly?
{5, 22, 4, 5} -> 52245?
When I use the command FromDigits in Mathematica
FromDigits[{5, 22, 4, 5}]
The result is incorrect, namely 7245
$\begingroup$
$\endgroup$
Add a comment
|
5 Answers
$\begingroup$
$\endgroup$
0
Here are three ways to do it. The first is the best I think:
FromDigits@Flatten[IntegerDigits /@ {5, 22, 4, 5}]
ToExpression@StringJoin[ToString /@ {5, 22, 4, 5}]
ToExpression@StringJoin@StringCases[Characters@ToString@{5, 22, 4, 5}, DigitCharacter]
$\begingroup$
$\endgroup$
FromDigits @ ToString @ Row @ {5, 22, 4, 5}
Head[%]
52245 Integer
answered Jun 14, 2020 at 13:25
$\begingroup$
$\endgroup$
ToExpression@StringJoin@IntegerString[{5, 22, 4, 5}]
52245
ToExpression@StringJoin@IntegerString[{5, 22, 4, 5},#]&/@{2,10,16}
{10110110100101, 52245, 51645}
$\begingroup$
$\endgroup$
1
{5, 22, 4, 5} ~ StringRiffle ~ "" // FromDigits
52245
-
1$\begingroup$ Awesome. Never thought of StringRiffle $\endgroup$ May 25, 2021 at 14:25
$\begingroup$
$\endgroup$
list = {5, 22, 4, 5};
FromDigits[StringJoin[IntegerString[list]]]
which gives
52245
answered May 25, 2021 at 14:16