Find non-case sensitive string in a mixed list of elements? The Next CEO of Stack...
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Find non-case sensitive string in a mixed list of elements?
Find non-case sensitive string in a mixed list of elements?
The Next CEO of Stack OverflowBuilding a list recursive with one or more argumentsReturn Functions from parallel execution of moduleFast method to select matrix elements based on a vector of positionsIssue with very large lists in MathematicaFaster position list construction from a “take instructions” listConvert elements of list to stringAdding a collection of neighbors to points in a list, concatenating strings, parallelization/optimizing run-time?Get sublists by pattern?Obtaining the position in a list where the i^th element is bigger than the (i+1)^th elementExtract all instances of variables matching a pattern?
$begingroup$
Consider an example list with mixed element types, e.g.:
list = { 1.234 , a[2] , {"Abc" , 4/5} , "acb" };
I would like to have a function that finds the position of a string, without regard to upper or lower characters, e.g.:
findPosition[list,"abc"]
{{3,1}}
Is there a function like that in Mathematica? Or maybe one can implement it with efficient performance?
EDIT:
My current workaround is:
findPosition[list_,str_]:=Position[list/.x_String:>ToLowerCase[x],ToLowerCase[str]]
list-manipulation function-construction searching
asked 2 hours ago
KagaratschKagaratsch
4,77631348
$endgroup$
add a comment |
$begingroup$
Consider an example list with mixed element types, e.g.:
list = { 1.234 , a[2] , {"Abc" , 4/5} , "acb" };
I would like to have a function that finds the position of a string, without regard to upper or lower characters, e.g.:
findPosition[list,"abc"]
{{3,1}}
Is there a function like that in Mathematica? Or maybe one can implement it with efficient performance?
EDIT:
My current workaround is:
findPosition[list_,str_]:=Position[list/.x_String:>ToLowerCase[x],ToLowerCase[str]]
list-manipulation function-construction searching
asked 2 hours ago
KagaratschKagaratsch
4,77631348
$endgroup$
add a comment |
$begingroup$
Consider an example list with mixed element types, e.g.:
list = { 1.234 , a[2] , {"Abc" , 4/5} , "acb" };
I would like to have a function that finds the position of a string, without regard to upper or lower characters, e.g.:
findPosition[list,"abc"]
{{3,1}}
Is there a function like that in Mathematica? Or maybe one can implement it with efficient performance?
EDIT:
My current workaround is:
findPosition[list_,str_]:=Position[list/.x_String:>ToLowerCase[x],ToLowerCase[str]]
list-manipulation function-construction searching
asked 2 hours ago
KagaratschKagaratsch
4,77631348
$endgroup$
Consider an example list with mixed element types, e.g.:
list = { 1.234 , a[2] , {"Abc" , 4/5} , "acb" };
I would like to have a function that finds the position of a string, without regard to upper or lower characters, e.g.:
findPosition[list,"abc"]
{{3,1}}
Is there a function like that in Mathematica? Or maybe one can implement it with efficient performance?
EDIT:
My current workaround is:
findPosition[list_,str_]:=Position[list/.x_String:>ToLowerCase[x],ToLowerCase[str]]
list-manipulation function-construction searching
list-manipulation function-construction searching
asked 2 hours ago
KagaratschKagaratsch
4,77631348
asked 2 hours ago
KagaratschKagaratsch
4,77631348
edited 2 hours ago
Kagaratsch
asked 2 hours ago
KagaratschKagaratsch
4,77631348
asked 2 hours ago
KagaratschKagaratsch
4,77631348
asked 2 hours ago
KagaratschKagaratsch
4,77631348
4,77631348
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
Position[list, s_String /; ToLowerCase[s] == "abc"]
{{3, 1}}
or
Position[list, s_String?(EqualTo["abc"]@*ToLowerCase)]
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
$endgroup$
$begingroup$
I like how this does not need to make substitutions inlistitself to search it!
$endgroup$
– Kagaratsch
2 hours ago
1
$begingroup$
Position[ToLowerCase[list], "abc"]also works.
$endgroup$
– C. E.
1 hour ago
add a comment |
$begingroup$
Note that ToLowerCase does not evaluate if the input is not a string, but it is Listable, so it will thread over your list:
list = {1.234, a[2], {"Abc", 4/5}, "acb"};
ToLowerCase[list]
(* Out: {ToLowerCase[1.234], ToLowerCase[a[2]], {"abc", ToLowerCase[4/5]}, "acb"} *)
That should not bother you though; it certainly does not bother Position:
Position[ToLowerCase[list], "abc"]
(* Out: {{3, 1}} *)
answered 19 mins ago
MarcoBMarcoB
38.2k556114
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Position[list, s_String /; ToLowerCase[s] == "abc"]
{{3, 1}}
or
Position[list, s_String?(EqualTo["abc"]@*ToLowerCase)]
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
$endgroup$
$begingroup$
I like how this does not need to make substitutions inlistitself to search it!
$endgroup$
– Kagaratsch
2 hours ago
1
$begingroup$
Position[ToLowerCase[list], "abc"]also works.
$endgroup$
– C. E.
1 hour ago
add a comment |
$begingroup$
Position[list, s_String /; ToLowerCase[s] == "abc"]
{{3, 1}}
or
Position[list, s_String?(EqualTo["abc"]@*ToLowerCase)]
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
$endgroup$
$begingroup$
I like how this does not need to make substitutions inlistitself to search it!
$endgroup$
– Kagaratsch
2 hours ago
1
$begingroup$
Position[ToLowerCase[list], "abc"]also works.
$endgroup$
– C. E.
1 hour ago
add a comment |
$begingroup$
Position[list, s_String /; ToLowerCase[s] == "abc"]
{{3, 1}}
or
Position[list, s_String?(EqualTo["abc"]@*ToLowerCase)]
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
$endgroup$
Position[list, s_String /; ToLowerCase[s] == "abc"]
{{3, 1}}
or
Position[list, s_String?(EqualTo["abc"]@*ToLowerCase)]
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
answered 2 hours ago
Henrik SchumacherHenrik Schumacher
58.6k581162
58.6k581162
$begingroup$
I like how this does not need to make substitutions inlistitself to search it!
$endgroup$
– Kagaratsch
2 hours ago
1
$begingroup$
Position[ToLowerCase[list], "abc"]also works.
$endgroup$
– C. E.
1 hour ago
add a comment |
$begingroup$
I like how this does not need to make substitutions inlistitself to search it!
$endgroup$
– Kagaratsch
2 hours ago
1
$begingroup$
Position[ToLowerCase[list], "abc"]also works.
$endgroup$
– C. E.
1 hour ago
$begingroup$
I like how this does not need to make substitutions in
list itself to search it!$endgroup$
– Kagaratsch
2 hours ago
$begingroup$
I like how this does not need to make substitutions in
list itself to search it!$endgroup$
– Kagaratsch
2 hours ago
1
1
$begingroup$
Position[ToLowerCase[list], "abc"] also works.$endgroup$
– C. E.
1 hour ago
$begingroup$
Position[ToLowerCase[list], "abc"] also works.$endgroup$
– C. E.
1 hour ago
add a comment |
$begingroup$
Note that ToLowerCase does not evaluate if the input is not a string, but it is Listable, so it will thread over your list:
list = {1.234, a[2], {"Abc", 4/5}, "acb"};
ToLowerCase[list]
(* Out: {ToLowerCase[1.234], ToLowerCase[a[2]], {"abc", ToLowerCase[4/5]}, "acb"} *)
That should not bother you though; it certainly does not bother Position:
Position[ToLowerCase[list], "abc"]
(* Out: {{3, 1}} *)
answered 19 mins ago
MarcoBMarcoB
38.2k556114
$endgroup$
add a comment |
$begingroup$
Note that ToLowerCase does not evaluate if the input is not a string, but it is Listable, so it will thread over your list:
list = {1.234, a[2], {"Abc", 4/5}, "acb"};
ToLowerCase[list]
(* Out: {ToLowerCase[1.234], ToLowerCase[a[2]], {"abc", ToLowerCase[4/5]}, "acb"} *)
That should not bother you though; it certainly does not bother Position:
Position[ToLowerCase[list], "abc"]
(* Out: {{3, 1}} *)
answered 19 mins ago
MarcoBMarcoB
38.2k556114
$endgroup$
add a comment |
$begingroup$
Note that ToLowerCase does not evaluate if the input is not a string, but it is Listable, so it will thread over your list:
list = {1.234, a[2], {"Abc", 4/5}, "acb"};
ToLowerCase[list]
(* Out: {ToLowerCase[1.234], ToLowerCase[a[2]], {"abc", ToLowerCase[4/5]}, "acb"} *)
That should not bother you though; it certainly does not bother Position:
Position[ToLowerCase[list], "abc"]
(* Out: {{3, 1}} *)
answered 19 mins ago
MarcoBMarcoB
38.2k556114
$endgroup$
Note that ToLowerCase does not evaluate if the input is not a string, but it is Listable, so it will thread over your list:
list = {1.234, a[2], {"Abc", 4/5}, "acb"};
ToLowerCase[list]
(* Out: {ToLowerCase[1.234], ToLowerCase[a[2]], {"abc", ToLowerCase[4/5]}, "acb"} *)
That should not bother you though; it certainly does not bother Position:
Position[ToLowerCase[list], "abc"]
(* Out: {{3, 1}} *)
answered 19 mins ago
MarcoBMarcoB
38.2k556114
answered 19 mins ago
MarcoBMarcoB
38.2k556114
answered 19 mins ago
MarcoBMarcoB
38.2k556114
answered 19 mins ago
MarcoBMarcoB
38.2k556114
38.2k556114
add a comment |
add a comment |
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