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Comments on Are All Elements Equal?

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Are All Elements Equal?

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Challenge

Given a list of integers >= 0 , check if all of them are equal.

Tests

[1,1,1,1,1] -> true
[0,1,1,6,7] -> false
[1]         -> true  
[]          -> undefined(you do not need to handle this)

You may take the integers in any form(strings, list, codepoints, etc.)

You can output two distinct values for true or false, or simply a truthy or falsy value in your language.

Trivial builtins are allowed, but it is encouraged to edit them into the trivial builtins answer, or try a different approach.

code-golf decision-problem list array
posted over 3 years ago
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2 comment threads

Trivial builtins (2 comments)
CW trivial builtins answer? (5 comments)
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J, 4 bytes

-:|.

Try it online!

Checks if the input array matches itself reversed. This is a tacit form and is executed monadically as x f (g x).

posted almost 3 years ago
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south‭
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1 comment thread

This requires parentheses to work, so shouldn't they be counted? (4 comments)
This requires parentheses to work, so shouldn't they be counted?
torres‭ wrote over 2 years ago
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This requires parentheses to work, so shouldn't they be counted?

south‭ wrote over 2 years ago
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Honestly, that's a good question. I had not thought of that. If I am reading this right, though, parens are not required.

torres‭ wrote over 2 years ago
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By that description it would seem that the parentheses don't count. My concern is that, when they wrote the definition, they may have not known that in J there is a distinct difference between how "(-%)" works versus "-%".

south‭ wrote over 2 years ago
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Most times I explicitly state what type of submission it is as to avoid confusion.