Ruby If Nil Then Empty String

This is an activerecord method that exists for any rails object and will return. You can think of nil as the most general way of representing absence in ruby.

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Is an activesupport extension to ruby object and returns true for nil false empty or a white space string.

Ruby if nil then empty string.

Current ruby style guide stands the and and or keywords are banned. Is also an activesupport extension to ruby object and it is the negation of blank. Nil s to s returns a new string with nil inside it. To the object class.

Same is the case when data false blank. Anything can potentially be nil and every object can answer to the nil method. Returned nil or a string or a number something different than true or false. Is just a double negation of empty.

So it s better to use blank. Method to avoid empty string as well. Now let s cover a much more specific way of representing a lack of data and that is emptiness. It s just not worth it.

False nil all blank true present. In the previous section we ve covered the nil construct in ruby. I don t understand the issue. For example nil and are blank.

Because nil is nil not a string. If you want b to be something other than nil you need to set it. That way the returned value is always converted to a boolean value. Nil object id 4 let s take.

This is useful in case empty. Dave newton jul 31 13 at 12 10. As i said to s can return anything and in general doing things to that string will not affect the underlying object. Because if discount is nil then it will not have a zero.

Returns true for nil false empty or a whitespace string. An object is blank if it s false empty or a whitespace string. It s also a falsy value meaning that it behaves like false when used in a conditional statement. Well nil is a special ruby object used to represent an empty or default value.

Rails adds the method blank. 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. Is a rails method and solves the issue of the ugly error you get when checking if something nil is empty.