Tag: pug

JavaScript implicit coercion of empty arrays

JavaScript implicit coercion of empty arrays example: [] == ![] //toBoolean [1] [] == !true [] == false //loose equality round one [2] //toPrimitive([]) [3] "" == false //loose equality round two //toBoolean("") [4] false === false true explanations: 1) First there is operator precedence so ! evaluates before == Negating something calls the internal toBoolean method onto that "something" first. … Continue reading JavaScript implicit coercion of empty arrays

Advertisements