programming practices - Default values - are they good or evil ...
2021年4月12日 · If a value is sensible for 80% or more uses, it needs to be a default value; If there are no values that are used for the majority of cases, do not use defaults. Default values prevent stupid mistakes from the setup code. If the defaults are reasonable for most cases, fewer people mess with the working configuration.
c# - Should I assign a default value for this property in the ...
2019年11月13日 · If there is a default value it should be clearly documented, see 'principle of least astonishment'. Another principle is that when the object has been constructed it should be in an valid state. Your suggestion to leave the 'method' empty and fail when used would violate this.
Is it necessary for a boolean to be "false" by default?
2018年8月2日 · Implicit Default: In many languages, the absence of a boolean property is interpreted as if the property were false (e.g. Javascript / Python). Optional properties with false defaults mean there’s no need to explicitly declare the default value in the code. We are also absolved of the responsibility of documenting the default value.
Default value variable, null vs empty string vs false
2017年1月25日 · I'll speak generally from experience with other languages. The point of initializing a variable is that you want it to have a default value, unless otherwise specified. If there isn't a useful default value from the outset and you'd rather indicate that no value has been assigned yet, then you use some value consistently.
Should an optional boolean function argument rather default to …
2022年9月6日 · If you have an optional argument, the argument should usually not be passed to the call. If you have an optional bool argument, I’d say 80% of calls should have no argument passed, and the default value is the 80% case. Less than 80% don’t use a default. YMMV) An exception could be setters where reading the setter call without argument ...
c# - Setting fields with correct default value - Software …
2014年7月14日 · 2. The semantic definition of a value - Like in your example, 0 is a clue for an initial state. In some cases I get no clue what 0 means. Note : State MUST be defined somewhere, be it a CONST value, or an enumeration somewhere. The value 0 has no other meaning than initial state. A string literal might add some more value to it.
c# - Should a getter be allowed to return a different value than …
2018年3月1日 · Everything else is a default implementation of a property. This code is the logical equivalent of "we need to convert null values into a default value". If we need to convert null values into a default value; the first question you should ask yourself is where the null value is coming from, which is here:
OOP best practice: Optional referenced-type parameter
I know in C#, by default, objects are passed by reference. That's not correct. In C#, parameters are passed by value by default. But if that parameter is a reference type (like a class or interface), then it's the reference that's passed by value, not the object itself. If you actually want to pass by reference, you need to use ref, out or in.
web api - Use empty string, null or remove empty property in API ...
2017年3月8日 · The first may be a default value which the user of your interface may want to set. Unfortunately, the second value is a flag to indicate that your system is not functioning correctly. In such cases, you probably want to fail as safely as possible (whatever that means for your system). Example 2. You're using a C struct which has a char * member.
If condition not true: default value or else clause? [closed]
When I want to express that variable "var" is by default should get value "A", but in some cases it can be "B" or "C", I set the initialization value to "A". When the code is responsible to set "var" to a specific value without any default, I leave it uninitialized - that will even give a nice compiler warning if there is a forgotten path.