Questions tagged [constants]
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23 questions
0 votes
1 answer
1k views
Should private static constants be in declaration (header) or defintion (source)?
Given a class which has certain private, constants (e.g., configuration), should these (A) be included in the declaration of the class (in the private section) or (B) should it be "hidden" ...
- 799
1 vote
2 answers
3k views
How to deal with constants that are shared between multiple packages?
I'm looking at creating my first packages to clean up my codebase. Below is a very simplified version of my current project structure: my_project/ |-database.py |-app_1.py |-app_2.py |-constants.py ...
- 311
1 vote
1 answer
109 views
Term for a map of constants [closed]
Considering there's a map of string constants, most commonly with a key and a value being equal, e.g. in TypeScript: const itemTypes = { FOO_BAR: 'FOO_BAR', BAZ_QUX: 'BAZ_QUX', } as const; They ...
- 195
144 votes
3 answers
35k views
Where do "magic" hashing constants like 0x9e3779b9 and 0x9e3779b1 come from?
In code dealing with hash tables, I often find the constant 0x9e3779b9 or sometimes 0x9e3779b1. For example hash = n * 0x9e3779b1 >>> 24 Why is this particular value used?
- 1,023
1 vote
1 answer
710 views
Should I use accessors or public static fields for global constants?
I have to work on some code that was CAST-audited. The report says that it is bad in Java to use public static and that accessors should be preferred. That is also what I was taught at school. The ...
- 163
0 votes
2 answers
622 views
Referencing Database Primary Keys from Codebase
I don't have a lot of experience with these kind of issues, but I feel I need to consult on this issue. The current codebase I'm working on is using what I consider to be a questionable technique to ...
- 109
3 votes
1 answer
121 views
Should I replace a constant with static methods, if that constant usually 'cooperate' with a specific operator?
For example, to convert between g and kg, I have a constant 1000: public static final float G_TO_KG=1000; . . . this.result = someResult*1000; I found G_TO_KG always bind to operator '*'. So my ...
- 5,760
1 vote
1 answer
244 views
Should I make constant for values of three choices (trivalent/ternary)?
For two choices there is boolean. In my case, I have positive, negative, and neutral which are three choices and cannot be represented by boolean. I've see there's method Math.signum(x) in Java which ...
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