When I input <pre class="prettyprint"><code>p [[2,1],3,4][1][1] </code></pre> It will output 1. Why is that happening?

<ul> <li> <code>[2,1]</code> creates an array with two elements (<code>2</code>, <code>1</code>)</li> <li> <code>[[2,1],3,4]</code> creates an array with three elements (<code>[2,1]</code>, <code>3</code> and <code>4</code>)</li> <li> <code>[1]</code> indexes that array and returns the second element <code>3</code> (indexing is 0 based)</li> <li> <code>[1]</code> indexes the second bit of the number <code>3</code> (represented in binary as <code>11</code>) - aka <code>1</code> </li> </ul>

How does Ruby's array work?

Tags:

arrays

ruby

When I input

p [[2,1],3,4][1][1]

It will output 1.

Why is that happening?

280

asked Dec 08 '22 21:12

Shukai Ni

1 Answers

[2,1] creates an array with two elements (2, 1)
[[2,1],3,4] creates an array with three elements ([2,1], 3 and 4)
[1] indexes that array and returns the second element 3 (indexing is 0 based)
[1] indexes the second bit of the number 3 (represented in binary as 11) - aka 1