coffeescript – w3toppers.com

Is there any way to not return something using CoffeeScript?

You have to explicitly return nothing, or to leave an expression evaluating to undefined at the bottom of your function: fun = -> doSomething() return Or: fun = -> doSomething() undefined This is what the doc recommends, when using comprehensions: Be careful that you’re not accidentally returning the results of the comprehension in these cases, … Read more

How does CoffeeScript’s existential operator work?

The documentation says this about ?: CoffeeScript’s existential operator ? returns true unless a variable is null or undefined, which makes it analogous to Ruby’s nil? so of course this will say “No taco!”: taco = undefined if taco? console.log “fiesta!” else console.log “No taco!” Your taco is explicitly undefined so taco? is false. CoffeeScript … Read more