Contents
What means empty return?
It means it will return None . You could remove the return and it would still return None because all functions that don’t specify a return value in python will by default return None .
Does an empty string return null?
An empty object implies data has been returned, whereas returning null clearly indicates that nothing has been returned.
Can a string be empty?
An empty string is a string instance of zero length, whereas a null string has no value at all. It is a character sequence of zero characters. A null string is represented by null . It can be described as the absence of a string instance.
Which method will return an empty string?
read() method returns an empty string whether the input file has a string or not.
What does an empty return statement do?
3 Answers. Return in a void function is used to escape the control flow before the natural end of a function. As such, it needs to be a valid statement. Going out of your way to explicitly forbid it as the final statement in a function serves no purpose except to break existing code.
What happens when you return nothing?
Using return without a value will return the value undefined . So, while the code should logically return true or false , not true or undefined , you can’t just change return; to return false; without checking how the return value is used.
Should you ever return null?
Returning null Creates More Work An ideal function, like an assistant cook, will encapsulate work and produce something useful. A function that returns a null reference achieves neither goal. Returning null is like throwing a time bomb into the software. Other code must a guard against null with if and else statements.
What’s the difference between return string and return String.Empty?
Since string is a language alias for String, there is absolutely no difference between the first and the second expressions. Starting with .NET 2, “” returns exactly the same object as String.Empty, making all three statements exact equivalents of each other in terms of the value that they return.
Is there a formula to return an empty string in Excel?
In plain English: if Value 1 equals 1, return Value 2. If Value 1 is not 1, return an empty string (“”). Note if you type “” directly into a cell in Excel, you’ll see the double quote characters. However, when you enter as a formula like this: You won’t see anything, the cell will look blank.
Is it possible to return an empty string in GCC?
As Frerich Raabe said, when passing an empty C_string, it still needs to do processing on it, instead of just allocating memory. It seems that this can’t be optimised away (at least not by GCC)
What do you do with an empty cell in Excel?
If the return cell in an Excel formula is empty, Excel by default returns 0 instead. For example cell A1 is blank and linked to by another cell. But what if you want to show the exact return value – for empty cells as well as 0 as return values? This article introduces three different options for dealing with empty return values.