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Discussion

markdown guide
 

WAT

That's all there is to say about those things... See this brilliant talk:

destroyallsoftware.com/talks/wat

 

Try with this too:

  • [1] - 0
  • [1] + 1
  • [1] - 1
  • [1, 2] - 0
  • 1 + {}
  • [1] + {}
 

Wrong on the first one, definitly not expected that.

 
  1. I Suspected but got wrong.
  2. I got it right
  3. Never expected that to happen
  4. Obviously i expected
 
 

My answers, 50%:

  1. [{}] // Wrong
  2. [0] // Wrong
  3. 1 // Right
  4. 0 // Right
 

How does this happen? Can anyone explain? :O

 

The + operator can either concatenate two elements or perform an addition.

In the first case, it will convert both elements to strings, the array being an empty string and the second one being [Object object].

Second does pretty much the same thing, [] = '', 0 = '0', '' + '0' = '0'
And the others are similar.