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How to use Swift @autoclosure
...akes no argument:
func f(pred: () -> Bool) {
if pred() {
print("It's true")
}
}
To call this function, we have to pass in a closure
f(pred: {2 > 1})
// "It's true"
If we omit the braces, we are passing in an expression and that's an error:
f(pred: 2 > 1)
// error: '&g...
How do I execute a command and get the output of the command within C++ using POSIX?
...
@Yasky: When the program being executed is int main(){ puts("ERROR"); }.
– dreamlax
Dec 16 '13 at 21:03
8
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What is the difference between declarative and imperative programming? [closed]
...le, let's start with this collection, and choose the odd numbers:
List<int> collection = new List<int> { 1, 2, 3, 4, 5 };
With imperative programming, we'd step through this, and decide what we want:
List<int> results = new List<int>();
foreach(var num in collection)
{
...
How To Create Table with Identity Column
...
CREATE TABLE [dbo].[History](
[ID] [int] IDENTITY(1,1) NOT NULL,
[RequestID] [int] NOT NULL,
[EmployeeID] [varchar](50) NOT NULL,
[DateStamp] [datetime] NOT NULL,
CONSTRAINT [PK_History] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF...
Singleton with Arguments in Java
...
I'll make my point very clear: a singleton with parameters is not a singleton.
A singleton, by definition, is an object you want to be instantiated no more than once. If you are trying to feed parameters to the constructor, what is the poi...
How are Anonymous inner classes used in Java?
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Or you could refactor duplicate anonymous inner classes into one method with the anonymous inner class (and possibly some other duplicated code).
– Tom Hawtin - tackline
Dec 14 '08 at 17:13
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What's the algorithm to calculate aspect ratio?
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I gather you're looking for an usable aspect ratio integer:integer solution like 16:9 rather than a float:1 solution like 1.77778:1.
If so, what you need to do is find the greatest common divisor (GCD) and divide both values by that. The GCD is the highest number that evenly...
Can git automatically switch between spaces and tabs?
...
That way:
each time you checkout some files of your repo, spaces can be converted in tabs,
but when you check-in (and push and publish), those same files are stored back using only spaces.
You can declare this filter driver (named here 'tabspace') in the .git/info/attributes (for a filter appl...
what is “strict mode” and how is it used?
...alue is not coerced to an object. A this value of null or undefined is not converted to the global object and primitive values are not converted to wrapper objects. The this value passed via a function call (including calls made using Function.prototype.apply and Function.prototype.call) do not coer...
How to append text to a text file in C++?
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You need to specify the append open mode like
#include <fstream>
int main() {
std::ofstream outfile;
outfile.open("test.txt", std::ios_base::app); // append instead of overwrite
outfile << "Data";
return 0;
}
...