Create array of columns letters where column header fulfills criteria - google-sheets

Question

in Google Sheets using formulars I would like to build an array of the columns that fulfills a simple criteria, so for example:
A
B
C
D
E
F
G
h1
h2
h2
h1
h3
h2
h1
Then I would like to have the array {A:A,D:D,G:G} if I search for 'h1'

Answer 1

I suppose what you want is to get the Column letter of the cell if some criteria is met. Like :"what colums have the right answer?" and the return that letter in some way.
So as far as i know sheets does not provide that as a simple function. (But im not very skilled in sheets).
Heres a hacky thing that might work for you:
Somwhere in your sheet (eg bottom row # 100 make cells that hold your letters
So A100 holds "A" or "A:A" B100 holds "B" or "B:B" and so forth.
then you can use filter function.
If the row you want to want to investigate is the first:
code:
=FILTER(A100:Z100;A1:Z1="h2")
that will give you your array.
Cheers Mads

Answer 2

Suppose your raw data is in a sheet named Sheet1.
In a new sheet (e.g., Sheet2), place the following formula in A1:
=IFERROR(FILTER(Sheet1!A:G,Sheet1!A1:G1="h1"))
You could also place this version of the formula in Sheet2 cell B1:
=IFERROR(FILTER(Sheet2!A:G,Sheet2!A1:G1=A1))
... and then enter "h1" (or some other text to match) into cell A1.
ADDENDUM (after further comment from OP):
=IFERROR(FILTER(REGEXREPLACE(ADDRESS(1,COLUMN(Sheet2!A:G),4)&":"&ADDRESS(1,COLUMN(Sheet2!A:G),4),"\d",""),Sheet2!A1:G1="h1"))

Answer 3

heres a pice of code that will give you the column letter for any column.
Maybe you can use this in your code, or you can paste it in a cell and copy drag vertically it to get the column letters, like i sugested in previous post.
=IF(TRUNC((column()-1)/26)<1;CHAR((MOD((column()-1);26))+65);CHAR(TRUNC((column()-1)/26)+65)&CHAR((MOD((column()-1);26))+65))
Good Luck :)