How to apply `Length` in all elements












2












$begingroup$


I want to apply Length in each element from a list.
For example:



My list is: {1,{2,3},{4,5,6}}



How to apply Length in each element of this list?



Length[{1}]

Length[{2,3}]

Length[{4,5,6}]


I have tried to use Thread, but doesn't works:



In[235]:= Thread[Length[{1, {2, 3}, {4, 5, 6}}]]



Out[235]= 3


The result that I want is some like:



1

2

3


Which is the number of elements in each element.






functions function-construction







share|improve this question









$endgroup$








  • 1




    $begingroup$
    What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
    $endgroup$
    – Carl Lange
    8 hours ago
















2












$begingroup$


I want to apply Length in each element from a list.
For example:



My list is: {1,{2,3},{4,5,6}}



How to apply Length in each element of this list?



Length[{1}]

Length[{2,3}]

Length[{4,5,6}]


I have tried to use Thread, but doesn't works:



In[235]:= Thread[Length[{1, {2, 3}, {4, 5, 6}}]]



Out[235]= 3


The result that I want is some like:



1

2

3


Which is the number of elements in each element.






functions function-construction







share|improve this question









$endgroup$








  • 1




    $begingroup$
    What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
    $endgroup$
    – Carl Lange
    8 hours ago














2












2








2





$begingroup$


I want to apply Length in each element from a list.
For example:



My list is: {1,{2,3},{4,5,6}}



How to apply Length in each element of this list?



Length[{1}]

Length[{2,3}]

Length[{4,5,6}]


I have tried to use Thread, but doesn't works:



In[235]:= Thread[Length[{1, {2, 3}, {4, 5, 6}}]]



Out[235]= 3


The result that I want is some like:



1

2

3


Which is the number of elements in each element.






functions function-construction







share|improve this question









$endgroup$




I want to apply Length in each element from a list.
For example:



My list is: {1,{2,3},{4,5,6}}



How to apply Length in each element of this list?



Length[{1}]

Length[{2,3}]

Length[{4,5,6}]


I have tried to use Thread, but doesn't works:



In[235]:= Thread[Length[{1, {2, 3}, {4, 5, 6}}]]



Out[235]= 3


The result that I want is some like:



1

2

3


Which is the number of elements in each element.






functions function-construction




functions function-construction






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 9 hours ago









MateusMateus

48516




48516








  • 1




    $begingroup$
    What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
    $endgroup$
    – Carl Lange
    8 hours ago














  • 1




    $begingroup$
    What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
    $endgroup$
    – Carl Lange
    8 hours ago








1




1




$begingroup$
What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
$endgroup$
– Carl Lange
8 hours ago




$begingroup$
What in your opinion is the Length of 1? You can use Map: Map[Length, {1, {2, 3}, {4, 5, 6}}].
$endgroup$
– Carl Lange
8 hours ago










2 Answers
2






active

oldest

votes


















4












$begingroup$

If[AtomQ @ #, 1, Length @ #] & /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}




If the input list does not contain {} (thanks: @corey979), you can also use:



Length /@ {1, {2, 3}, {4, 5, 6}} /. 0 -> 1

(* or Map[Length]@{1, {2, 3}, {4, 5, 6}} /. 0 -> 1 *)



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
    $endgroup$
    – corey979
    8 hours ago










  • $begingroup$
    @corey979, very good point.
    $endgroup$
    – kglr
    8 hours ago



















3












$begingroup$

Introduce Charting`padList to make a list for your element..



Length@*Charting`padList /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Brilliant. Care to elaborate more on Charting`padList?
    $endgroup$
    – corey979
    8 hours ago











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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes









4












$begingroup$

If[AtomQ @ #, 1, Length @ #] & /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}




If the input list does not contain {} (thanks: @corey979), you can also use:



Length /@ {1, {2, 3}, {4, 5, 6}} /. 0 -> 1

(* or Map[Length]@{1, {2, 3}, {4, 5, 6}} /. 0 -> 1 *)



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
    $endgroup$
    – corey979
    8 hours ago










  • $begingroup$
    @corey979, very good point.
    $endgroup$
    – kglr
    8 hours ago
















4












$begingroup$

If[AtomQ @ #, 1, Length @ #] & /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}




If the input list does not contain {} (thanks: @corey979), you can also use:



Length /@ {1, {2, 3}, {4, 5, 6}} /. 0 -> 1

(* or Map[Length]@{1, {2, 3}, {4, 5, 6}} /. 0 -> 1 *)



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
    $endgroup$
    – corey979
    8 hours ago










  • $begingroup$
    @corey979, very good point.
    $endgroup$
    – kglr
    8 hours ago














4












4








4





$begingroup$

If[AtomQ @ #, 1, Length @ #] & /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}




If the input list does not contain {} (thanks: @corey979), you can also use:



Length /@ {1, {2, 3}, {4, 5, 6}} /. 0 -> 1

(* or Map[Length]@{1, {2, 3}, {4, 5, 6}} /. 0 -> 1 *)



{1, 2, 3}







share|improve this answer











$endgroup$



If[AtomQ @ #, 1, Length @ #] & /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}




If the input list does not contain {} (thanks: @corey979), you can also use:



Length /@ {1, {2, 3}, {4, 5, 6}} /. 0 -> 1

(* or Map[Length]@{1, {2, 3}, {4, 5, 6}} /. 0 -> 1 *)



{1, 2, 3}








share|improve this answer














share|improve this answer



share|improve this answer








edited 7 hours ago

























answered 8 hours ago









kglrkglr

180k9200413




180k9200413












  • $begingroup$
    Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
    $endgroup$
    – corey979
    8 hours ago










  • $begingroup$
    @corey979, very good point.
    $endgroup$
    – kglr
    8 hours ago


















  • $begingroup$
    Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
    $endgroup$
    – corey979
    8 hours ago










  • $begingroup$
    @corey979, very good point.
    $endgroup$
    – kglr
    8 hours ago
















$begingroup$
Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
$endgroup$
– corey979
8 hours ago




$begingroup$
Note that the first approach fails on {1, {2, 3}, {}, {4, 5, 6}}. The second, however, works well.
$endgroup$
– corey979
8 hours ago












$begingroup$
@corey979, very good point.
$endgroup$
– kglr
8 hours ago




$begingroup$
@corey979, very good point.
$endgroup$
– kglr
8 hours ago











3












$begingroup$

Introduce Charting`padList to make a list for your element..



Length@*Charting`padList /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Brilliant. Care to elaborate more on Charting`padList?
    $endgroup$
    – corey979
    8 hours ago
















3












$begingroup$

Introduce Charting`padList to make a list for your element..



Length@*Charting`padList /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}







share|improve this answer











$endgroup$













  • $begingroup$
    Brilliant. Care to elaborate more on Charting`padList?
    $endgroup$
    – corey979
    8 hours ago














3












3








3





$begingroup$

Introduce Charting`padList to make a list for your element..



Length@*Charting`padList /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}







share|improve this answer











$endgroup$



Introduce Charting`padList to make a list for your element..



Length@*Charting`padList /@ {1, {2, 3}, {4, 5, 6}}



{1, 2, 3}








share|improve this answer














share|improve this answer



share|improve this answer








edited 8 hours ago

























answered 8 hours ago









yodeyode

10.2k234100




10.2k234100












  • $begingroup$
    Brilliant. Care to elaborate more on Charting`padList?
    $endgroup$
    – corey979
    8 hours ago


















  • $begingroup$
    Brilliant. Care to elaborate more on Charting`padList?
    $endgroup$
    – corey979
    8 hours ago
















$begingroup$
Brilliant. Care to elaborate more on Charting`padList?
$endgroup$
– corey979
8 hours ago




$begingroup$
Brilliant. Care to elaborate more on Charting`padList?
$endgroup$
– corey979
8 hours ago


















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