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The case_insensitive indexing function is used to create a table for which any object can be stored in an array or a table that uses the case_insensitive indexing function, but indexing into the table ignores the case of the letters in any symbols or strings in the indices.

Internally, indices that are strings or symbols are canonicalized to an all lowercase version via StringTools:-LowerCase . Indices that are not strings or symbols are first converted to strings, and then transformed to all lowercase.

$T≔\mathrm{table}\left('\mathrm{case\_insensitive}'\,\left[a=1\,b=2\right]\right)$

$T≔table\left(\mathrm{case\_insensitive}\,\left[b=2\,a=1\right]\right)$

$T\left[a\right]$

$1$

$T\left[A\right]$

$1$

$T\left[''A''\right]$

$T_{''A''}$

$T\left[A+b\right]≔3$

$T_{A+b}≔3$

$T\left[A+B\right]$

$3$