Optional Function Arguments

/ Published in: JavaScript
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Simple way of allowing functions to take optional arguments. Always place the optional arguments last, so you don't have to explicitly pass an argument as "undefined".

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  1. function optionalArguments(a, /*optional*/b){
  2. if(!b){b = []};//If b isn't set, create an empty array
  3. //OR shorthand for this
  4. b = b || [];
  5. /*
  6. * The OR operator looks to see if b is true, if it is it skips
  7. * creating the Array. If b is false it creates the array. Not
  8. * very readable.
  9. */
  10. }

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