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Why em instead of px?
...
It is wrong to say that one is a better choice than the other (or both wouldn't have been given their own purpose in the spec). It may even be worth noting that StackOverflow makes extensive use of px units. It is not the poor choice Spoike was to...
#1071 - Specified key was too long; max key length is 767 bytes
...cter it would be three bytes resulting in max index prefix length of 254.
One option you have is to just place lower limit on your VARCHAR fields.
Another option (according to the response to this issue) is to get the subset of the column rather than the entire amount, i.e.:
ALTER TABLE `mytable`...
decimal vs double! - Which one should I use and when? [duplicate]
...a double and when should I use a decimal type?
Which type is suitable for money computations? (ie. greater than $100 million)
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Why is the default value of the string type null instead of an empty string?
... the behaviour of reference types. Before invoking their instance members, one should put a check in place for a null reference.
If the default value of string were the empty string, I would not have
to test, and I would feel it to be more consistent with the other
value types like int or do...
How do I bind to list of checkbox values with AngularJS?
...an array of objects. Each solution has it pros and cons. Below you'll find one for each case.
With a simple array as input data
The HTML could look like:
<label ng-repeat="fruitName in fruits">
<input
type="checkbox"
name="selectedFruits[]"
value="{{fruitName}}"
ng-ch...
Why does a return in `finally` override `try`?
...urnState;
}
}
Generally speaking you never want to have more than one return statement in a function, things like this are why.
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When to use extern in C++
...es the header knows about it, but you only need to “define” it once in one of your source files.
To clarify, using extern int x; tells the compiler that an object of type int called x exists somewhere. It's not the compilers job to know where it exists, it just needs to know the type and name s...
Conditions for automatic generation of default/copy/move ctor and copy/move assignment operator?
... Copy ctor/assignment are 'independent' from each other. If you write just one, the compiler will provide the other. In contrast, if you provide either a move ctor or a move assignment, the compiler won't supply the other.
– Marco M.
Oct 3 '16 at 20:14
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How to redirect cin and cout to files?
...d; //output to the standard input
}
You could save and redirect in just one line as:
auto cinbuf = std::cin.rdbuf(in.rdbuf()); //save and redirect
Here std::cin.rdbuf(in.rdbuf()) sets std::cin's buffer to in.rdbuf() and then returns the old buffer associated with std::cin. The very same can be...
Monad in plain English? (For the OOP programmer with no FP background)
...on the amplified type, that obeys the rules of functional composition mentioned before.
There is often a way to get the unamplified type back out of the amplified type. Strictly speaking this operation is not required to have a monad. (Though it is necessary if you want to have a comonad. We won't c...