+ Add, Flip
Add
Syntax: x + y
Where x and y are conformable numeric or temporal atoms or lists, returns the sums of corresponding items.
Add is an atomic verb.
2+3
5
2+3 4 5
5 6 7
2019-06-28 + 7*!4 / add 0 1 2 3 weeks
2019-06-28 2019-07-05 2019-07-12 2019-07-19
12:34:56.789 + 1000 / add 1000 ms
12:34:57.789
Flip
Syntax: + x
Where x is
- a list of rank 2 or more, returns the transpose of
x, padding with nulls as needed - a dictionary of which at least one value is a list, returns a table in which the dictionary keys are column names, and missing cells contain nulls
- a dictionary of which all values are atoms of the same type, returns
x - anything else, signals a
classerror
Lists:
+2 3#!6 / list rank 2
0 3
1 4
2 5
a:"abcdefghijklmnopqrstuvwxyz"
2 3 4#a / list rank 3
("abcd";"efgh";"ijkl")
("mnop";"qrst";"uvwx")
+2 3 4#a
("abcd";"mnop")
("efgh";"qrst")
("ijkl";"uvwx")
+(`abc`def;24;"foo") / non-rectangular
(`abc;24;"f")
(`def;24;"o")
(`;24;"o")
Dictionaries:
+{a:`x`y`z;b:3} / values conform
a b
- -
x 3
y 3
z 3
+{a:`x`y`z;b:3 2} / values do not conform
a b
- --
x 3
y 2
z Ø
+{a:2019-12-14;b:2019-11-27} / values are atoms of same datatype
a|2019-12-14
b|2019-11-27