Can a list be a constant?

Can a list be a constant?

An example of a constant list is (2, ’33’, 2*–5, 2*(1, ‘3’)) . A constant list can be recursive and they can contain other constant lists. Individual list items can be repeated by using an iterator. A constant list has no data type nor does it have scalar values.

How do I make a constant list in Python?

Python list with constant value

1. You can multiply lists: [1] * 3 -> [1, 1, 1] . –
2. the usual name for unused variables is _ , unless you can get rid of it – njzk2 Feb 2 ’15 at 23:29.
3. although sometimes _ is for localizing strings…

How do you keep a constant in Java?

To make any variable a constant, we must use ‘static’ and ‘final’ modifiers in the following manner: Syntax to assign a constant value in java: static final datatype identifier_name = constant; The static modifier causes the variable to be available without an instance of it’s defining class being loaded.

How do you declare a constant in a list?

“how to declare list of object in java as constant” Code Answer

1. public static final List list = Collections. unmodifiableList(
2. new ArrayList() {{
3. add(“foo”);
4. add(“bar”);
5. // etc.
6. }});
7. ​

Can we define constant in Python?

No there is not. You cannot declare a variable or value as constant in Python. Just don’t change it. But you might want to have a look at the code snippet Constants in Python by Alex Martelli.

Can a list be a constant Python?

5 Answers. The constants can be any value you like, I’ve shown integers here, but lists and dicts would work just the same.

Which is the best way to store a constant?

Would it be better to store this constant as a String like: Since the path is already stored in memory, would it be more efficient to just keep a : separated list since that String will take up less space than the array.

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Which is the best way to store a list in Java?

Since the path is already stored in memory, would it be more efficient to just keep a : separated list since that String will take up less space than the array. In this instance, there’s a little more work to be done (iterating over String to turn it into list), but then the list is garbage collected when the method is over.

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