IsCol
Tests if a two-dimensional container has width 1.
Syntax
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IsCol(X)-
Xis any object
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Description
IsCol(X) returns true iff width(X) = 1.
Examples
A ≔ ❨❨5, 1, 2❩, ❨4, 7, 5❩, ❨0, 2, 1❩❩
⎛5 1 2⎞ ⎜4 7 5⎟ ⎝0 2 1⎠
B ≔ ❨❨4, 7, 6❩❩
(4 7 6)
C ≔ ❨❨1❩, ❨2❩, ❨7❩❩
⎛1⎞ ⎜2⎟ ⎝7⎠
'(IsCol(A), IsCol(B), IsCol(C))
false false true