One-argument form See also two-argument form Take
First selects the first item of its argument. When the argument is an empty array, first returns the prototype of the array.
†2 2½¼4 1 A„('A.S.FREEMAN') 35 15000 A A.S.FREEMAN 35 15000 ½A 3 †A (First item of A is a text vector) A.S.FREEMAN ½†A 11 TABLE„2 2½(2 2½¼4) (¼5) ('TEXT') ('EVEN MORE TEXT') TABLE (2 row, 2 column nested array) 1 2 1 2 3 4 5 3 4
TEXT EVEN MORE TEXT †TABLE (First item is a 2 by 2 numeric matrix) 1 2 3 4 ½†TABLE 2 2
First can be used in selective specification.