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When to add what indexes in a table in Rails
...ot.
Since Version 5 of rails the index will be created automatically, for more information see here.
Should I add "index" to the automatically created "id" column?
No, this is already done by rails
Should I add "index(unique)" to the automatically created "id" column?
No, same as above
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Difference between abstraction and encapsulation?
...ia variable templates (= generic templates for variables); with a slightly more complex syntax, e.g.:
template <typename T> constexpr T pi = T{3.1415926535};
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Better way to check variable for null or empty string?
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Why doesn't Mockito mock static methods?
...cs is to modify a class' byte code at runtime, which I suppose is a little more involved than inheritance.
That's my guess at it, for what it's worth...
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What's the difference between compiled and interpreted language?
...ts implementation, there are a variety of forms of "something else". From more popular to less popular, "something else" might be
Binary instructions for a virtual machine, often called bytecode, as is done in Lua, Python, Ruby, Smalltalk, and many other systems (the approach was popularized in t...
What is difference between MVC, MVP & MVVM design pattern in terms of coding c#
... "The view usually does not call the presenter" ? can you explain more about this sentence ? if ui view is not gonna call the presenter who is going to ?
– Amir Ziarati
Dec 13 '16 at 7:24
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A Regex that will never be matched by anything
...ly then not find the a and return a negative match. (See comment below for more detail.)
* Originally I did not give much thought on multiline-mode regexp, where $ also matches the end of a line. In fact, it would match the empty string right before the newline, so an ordinary character like a ca...
How should I read a file line-by-line in Python?
...y, into one action, is surprising to humans who read the code and makes it more difficult to reason about program behavior.
Other languages have essentially come to the same conclusion. Haskell briefly flirted with so-called "lazy IO" which allows you to iterate over a file and have it automatical...
Multiple Type Constraints in Swift
...SomeProtocol & SomeOtherProtocol>(arg: T) {
// stuff
}
or the more powerful where clause:
func someFunc<T>(arg: T) where T:SomeProtocol, T:SomeOtherProtocol{
// stuff
}
You can of course use protocol composition (e.g., protocol<SomeProtocol, SomeOtherProtocol> ), but ...