Data commit

Task/Arrays/8th/arrays.8th

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+[ 1 , 2  ,3 ] \ an array holding three numbers
+1 a:@       \ this will be '2', the element at index 1
+drop
+1 123 a:@ \ this will store the value '123' at index 1, so now
+.              \ will print [1,123,3]
+
+[1,2,3] 45 a:push
+\ gives us [1,2,3,45]
+\ and empty spots are filled with null:
+[1,2,3] 5 15 a:!
+\ gives [1,2,3,null,15]
+
+\ arrays don't have to be homogenous:
+[1,"one", 2, "two"]