• joneskind@lemmy.world
    0·
    3 months ago

    in javascript a property is truthy if it exists

    myThing.property = "some string"

if (myThing.property) { // true
  // do something
}

    It works with everything except of course for falsy values

    myThing.number = someNumberThatShouldNotBeEqualToZero

if (myThing.number) {
  // do something very important with that number that should not be equal to zero
}

// This can fail at anytime without warning

    So you’ve got to be extra careful with that logic when you’re dealing with numbers.

    I am not saying it’s wrong though. I’m saying it’s often annoying.

    • Skullgrid@lemmy.world
      0·
      3 months ago

      ah ok , I think I write this a bit more verbose when using other languages, instead of

      if(thing)
{
   stuff;
}

      I do

      
if(thing != null)
{
   stuff;
}

      so checking for numbers being truthy & existing didn’t seem like an issue