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Redefining 'undefined' in JavaScript

• lutusp 13y ago
  An interesting exposition, one that avoids mentioning that a person who tries to assign a value to "undefined" needs psychological help.
  • joshuacc 13y ago
    While this is undoubtedly true, there is also the case of accidental assignment. For example: if (undefined = "something") {} This is merely a case of stupidity, not madness. :-)
    • lutusp 13y ago
      > if (undefined = "something") {} Seasoned programmers avoid the possibility of inadvertent assignment by reversing the order of the arguments as a matter of habit: if ("something" = undefined) {} If (42 = secret_of_the_universe) {} Also, they try to avoid languages that use "=" as an equality test as well as an assignment operator. Early BASIC was infamous for this. > This is merely a case of stupidity, not madness. Must agree there. :)