Ruby If Nil Then Empty String

Current ruby style guide stands the and and or keywords are banned.

Ruby if nil then empty string. So it s better to use blank. Now let s cover a much more specific way of representing a lack of data and that is emptiness. Nil object id 4 let s take. Is an activesupport extension to ruby object and returns true for nil false empty or a white space string.

Is a rails method and solves the issue of the ugly error you get when checking if something nil is empty. Same is the case when data false blank. It s just not worth it. To the object class.

Dave newton jul 31 13 at 12 10. It s also a falsy value meaning that it behaves like false when used in a conditional statement. Because nil is nil not a string. Is just a double negation of empty.

I don t understand the issue. False nil all blank true present. Returns true for nil false empty or a whitespace string. This is an activerecord method that exists for any rails object and will return.

An object is blank if it s false empty or a whitespace string. Returned nil or a string or a number something different than true or false. This is useful in case empty. If you want b to be something other than nil you need to set it.

Because if discount is nil then it will not have a zero. For example nil and are blank. Method to avoid empty string as well.

In the previous section we ve covered the nil construct in ruby. Rails adds the method blank. Is also an activesupport extension to ruby object and it is the negation of blank. As i said to s can return anything and in general doing things to that string will not affect the underlying object.

There is only one nil object with an object id of 4 or 8 in 64 bit ruby this is part of why nil is special. You can think of nil as the most general way of representing absence in ruby. Anything can potentially be nil and every object can answer to the nil method.