Nov 7, 2013 · There are some discussions of the purpose of falsey values on Stack Overflow already, but no exhaustive complete answer listing what all the falsey values are. I couldn't …

Feb 26, 2016 · In JavaScript, a truthy value is a value that translates to true when evaluated in a Boolean context. All values are truthy unless they are defined as falsy (i.e., except for false, 0, …

The nullish coalescing operator (??) in JavaScript only considers null or undefined as "nullish" values. If the left-hand side is any other value, even falsy values like "" (empty string), 0, or …

Apr 15, 2015 · I had an interesting interview question today that stumped me a little. I was asked about falsey values. So undefined, NaN, null, 0, and an empty string all evaluate to false. What …

Oct 1, 2011 · 13 It's PHP where the string "0" is falsy (false-when-used-in-boolean-context). In JavaScript, all non-empty strings are truthy. The trick is that == against a boolean doesn't …

Apr 22, 2013 · var test = "test" || null test will evaluate to "test", the same holds true for any object in place of the string, so does javascript treat empty string as either a falsy or null value, and if …

Feb 11, 2015 · 11 I have a question concerning some concepts in JavaScript such as (truthy, true) and (falsy, false). I know the type of 1 is not true but the question is: why 1 == true? What was …

Feb 13, 2014 · The empty object is undefined, like this var empty_obj = {}. An undefined will be a false one. But I notice that empty_obj || 3 will return empty_obj not 3. Why is that?

Because JavaScript has what are called "truthy" and "falsy" values, there are expressions that when evaluated in other expressions will result in a true or false condition, even though the …

Jan 24, 2018 · As regras às vezes podem não ser intuitivas, mas são claramente definidas. Assim, valores truthy são aqueles que resultam em true quando convertidos para o tipo …