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davidlygagnon/CoffeeScript existential operations

Last active May 8, 2019 13:56
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CoffeeScript existential operations
// CoffeeScript
getPartNumber = (car) ->
car?.getMake()?.model?.partNumber
return
// JavaScript
const getPartNumber = function(car) {
__guard__(__guard__(car != null ? car.getMake() : undefined, x1 => x1.model), x => x.partNumber);
};
function __guard__(value, transform) {
return (typeof value !== 'undefined' && value !== null) ? transform(value) : undefined;
}
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