1/3/2023 0 Comments Xojo array number of values![]() ![]()
The default values, are the default values per type (false for booleans, 0 for integers, etc.) To make this work, it is evident that Xojo has to populate the value of the optionals by default values (if you do use them or not). Main routine: Var value1 As Integer = 10 Var value2 As Integer = 20 Var result As Integer Var specialResult As Integer result = myMethod( value1, value2 ) specialResult = myMethod( value1, value2, True ) BreakĪs you can see, you are not forced to call the third parameter, but you can use it in your method wherever you want. ![]() The method with its parameters will have to look like this: Please create an app with the following code: Var value1 As Integer = 10 Var value2 As Integer = 20 Var result As Integer result = myMethod( value1, value2 ) BreakĪnd a method myMethod with the following code: Var lResult As Integer lResult = value1 + value2 return lResult When reviewing others’ code, I’m often surprised that both concepts are rarely used (if at all). That’s true, but this doesn’t mean that there are no other ways to manipulate or transfer values. They are so powerful that many tutorials explaining “methods” refer to them, but obviously, that’s often a bit too much for a beginner.Īs I said above, you can only define return type. #Xojo array number of values free#But feel free to play return with dictionaries. I bet you get the idea, but we want to keep things still simple if one is not yet familiar with the concept of a dictionary, it will be hard to keep a tutorial for methods accessible. With a Xojo dictionary you can return many values, and in the calling method, you can identify the different results by the key of your dictionary. Please, don’t do that! A better approach is to work with a dictionary. Hence, it is not the best idea to return an array, where you will store a variable x in position 0, and a variable y in position 1, etc. #Xojo array number of values code#Now arrays are most likely not very beneficial to store results for where you call your method, because it will end up in very “dirty” code and complex (or impossible) to debug. But of course, you can return an array or a dictionary. #Xojo array number of values how to#Perhaps you tried already how to return more values … and you probably failed. We have seen in the above article that we can return a value. Otherwise you use append or insert methods which dynamically allocate new memory when you hit the current allocation limit.Now it’s time to dive into the topic a bit deeper, but hopefully still keeping it simple. What to do? Whenever you fill an array and you know the final ubound in advance, you can use redim beforehand and then set values. We made a feedback request to ask for optimization: Feedback 58755. There is no optimization to just change internal ubound and keep array allocation if e.g. So unless redim has already the value of ubound, a new memory block will be allocated and data is copied. ![]() When you do a redim on the array, you set the allocated size to the array to an explicit value. The number of values added is doubled each time as you see in our table: From Ubound Then whenever the appended values fills the allocated space, the allocation is resized to make room for more values. Then when you append the first value, the memory is allocated for 16 values, byte size depending on byte size of elements. We measured a bit and it looks like allocating an empty array will just allocate the array structure, but not allocate data for the array values. When you allocate an array in Xojo, you may wonder how many bytes are allocated and when. ![]()
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