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In Ruby, there are two logical "and" operators - && and and. At first glance, they seem similar, but they have different precedence.
&& has high precedence, so it is usually used for logical expressions, conditions, and loops.
and has low precedence, so it is often used for control flow when multiple actions need to be executed sequentially.
Example with &&:
result = true && false # first evaluates true && false => false # result => false
Example with and:
result = true and false # Ruby reads as (result = true) and false # first assigns result = true # then evaluates logical and with false, but this does not change the variable result result # => true
When and what to use?
- Use && for logic and conditions.
- Use and for sequential execution of actions (control flow), for example return true and log_success. But it's better not to do this. Because it can be a bit confusing.
Precedence determines the order of evaluation, not the result of the logical operation itself.
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