Timeline for Difference between @ and @@
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Nov 14, 2013 at 21:19 | comment | added | Hector |
@hongchaniyi: It might help if you visualize the {} as having an explicit head: Permutations@{x,y} = Permutations@List[x,y] = Permutations[List[x,y]]
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| Nov 14, 2013 at 21:07 | comment | added | Vladimir Reshetnikov | @hongchaniyi It's just that some functions accept a signle argument that is itself a list. | |
| Nov 14, 2013 at 21:06 | comment | added | user10568 | @Vladimir Thanks for your reply. However, if I input Permutations@{x,y}, I have {{x,y},{y,x}}. It seems @ also apply to a set of argument. | |
| Nov 14, 2013 at 20:58 | history | edited | Vladimir Reshetnikov | CC BY-SA 3.0 |
added 66 characters in body
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| Nov 14, 2013 at 20:51 | comment | added | Leonid Shifrin |
This description hides the fundamental feature of Apply that it replaces one head with another. Technically, a multi-parameter function is applied to a Sequence of arguments, not a List (or any other head there was around them, which gets "eaten up" by Apply).
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| Nov 14, 2013 at 20:29 | history | answered | Vladimir Reshetnikov | CC BY-SA 3.0 |