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"Don't repeat yourself" (DRY), also known as "duplication is evil", is a principle of software development aimed at reducing repetition of information which is likely to change, replacing it with abstractions that are less likely to change, or using data normalization which avoids redundancy in the first place.
Rule of three ("Three strikes and you refactor") is a code refactoring rule of thumb to decide when similar pieces of code should be refactored to avoid duplication. It states that two instances of similar code do not require refactoring, but when similar code is used three times, it should be extracted into a new procedure.
The rule of three (also known as the law of the big three or the big three) is a rule of thumb in C++ (prior to C++11) that claims that if a class defines any of the following then it should probably explicitly define all three: [1] destructor; copy constructor; copy assignment operator; These three functions are special member functions. If ...
For example, if you move a 401(k) into an IRA, then you want to be cautious. The good news is that the 60-day rule applies in one particular circumstance, what’s called an indirect rollover.
The 30-30-30 rule involves eating 30 grams of protein within 30 minutes of waking up, followed by 30 minutes of low-intensity, steady state cardiovascular exercise.
The effectiveness of a pattern of three items has also been noted in the visual arts. Cartoonist Art Spiegelman described the rule of three as being key to the work of Nancy creator Ernie Bushmiller, giving the example that "a drawing of three rocks in a background scene was Ernie's way of showing us there were some rocks in the background. It ...
Under U.S. case law, the definition of a security is drawn from a Supreme Court precedent called the Howey test, which defined a security as the investment of money in a common enterprise with the ...
The Power of 10 Rules were created in 2006 by Gerard J. Holzmann of the NASA/JPL Laboratory for Reliable Software. [1] The rules are intended to eliminate certain C coding practices that make code difficult to review or statically analyze.