Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I came across the following line of code in the underscore.js source:
function (obj, iterator, context) {
iterator || (iterator = _.identity);
...
}
Is that syntax equivalent to:
if (!iterator) {
iterator = _.identity;
}
Are there any performance benefits to using the former syntax other than reducing the statement to one line?
Yes, it is functionally equivalent to that.
The only benefit to doing it this way is that your check takes up two less lines.