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Accessing an SQLite Database in Swift
...nts. Declare Swift enums for discrete data types. Define your own database-convertible types.
Database Migrations
Speed: https://github.com/groue/GRDB.swift/wiki/Performance
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How are virtual functions and vtable implemented?
...a vtable
Foo z = arg; // copy constructor Foo::Foo(const Foo&) will convert to Foo
z.a(); // non-virtual Foo::a, since z is a Foo, even if arg was not
}
The steps the hardware has to take are essentially the same, no matter whether the function is overwritten or not. The address of...
What is dynamic programming? [closed]
...elf, usually with a smaller dataset. Since most recursive functions can be converted to similar iterative functions, this doesn't make a difference for algorithmic complexity either.
Dynamic programming is the process of solving easier-to-solve sub-problems and building up the answer from that. Mos...
How does the Windows Command Interpreter (CMD.EXE) parse scripts?
...le scanning for a :label, <Ctrl-Z>, is treated as itself - it is not converted to <LF>
Phase 1) Percent Expansion:
A double %% is replaced by a single %
Expansion of arguments (%*, %1, %2, etc.)
Expansion of %var%, if var does not exist replace it with nothing
Line is truncated at fi...
What's the difference between std::move and std::forward
...orward, but one can add cv-qualifiers. Y can not be a type that is merely convertible from X, except via an accessible Base conversion.
If Y is an lvalue reference, the result will be an lvalue expression. If Y is not an lvalue reference, the result will be an rvalue (xvalue to be precise) expre...
Split string into array of character strings
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How would you convert cArray back to String?
– Bitmap
Jun 27 '11 at 8:19
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Difference between two dates in Python
... d2 = d2.strftime("%Y-%m-%d")
return abs((d2 - d1).days)
This will convert your datetime objects to strings but, two things
1) Trying to do d2 - d1 will fail as you cannot use the minus operator on strings and
2) If you read the first line of the above answer it stated, you want to use the ...
Is it possible to specify condition in Count()?
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When working with boolean fields you can use this : SUM(CONVERT(int, IsManager))
– Simon_Weaver
Apr 4 '17 at 23:09
2
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How to format numbers by prepending 0 to single-digit numbers?
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If the number is higher than 9, convert the number to a string (consistency). Otherwise, add a zero.
function n(n){
return n > 9 ? "" + n: "0" + n;
}
n( 9); //Returns "09"
n(10); //Returns "10"
n(999);//Returns "999"
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Hidden features of WPF and XAML?
...into words just how much I love that feature. I hated having tons of value converters laying around.
– Rob
Jul 14 '09 at 13:53
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