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Best approach for designing F# libraries for use from both F# and C#
...alues (partially-applied functions, etc) with Func or Action, the rest are converted automatically. For example:
type A(arg) =
member x.Invoke(f: Func<_,_>) = f.Invoke(arg)
let a = A(1)
a.Invoke(fun i -> i + 1)
So it makes sense to use Func/Action where applicable. Does this eliminate...
Add new field to every document in a MongoDB collection
...assigned dynamically? For example, I would like to have new_field to be an int equal to the length of the string in test field.
– qed
Jan 17 '18 at 9:42
|...
Is there a stopwatch in Java?
...d by nanoTime, the value returned has no absolute meaning, and can only be interpreted as relative to another timestamp
returned by nanoTime at a different time. Stopwatch is a more
effective abstraction because it exposes only these relative values,
not the absolute ones.
Stopwatch stopw...
Why are C# 3.0 object initializer constructor parentheses optional?
... feature" of object initializers met our bar for "sugary" features. Some points we considered:
the design and specification cost was low
we were going to be extensively changing the parser code that handles object creation anyway; the additional development cost of making the parameter list option...
What is the JUnit XML format specification that Hudson supports?
...e junit-4.xsd that others have linked to and used a tool named XMLSpear to convert the schema to a blank XML file with the options shown below. This is the (slightly cleaned up) result:
<?xml version="1.0" encoding="UTF-8"?>
<testsuites disabled="" errors="" failures="" name="" tests="" ti...
Why do we need fibers
... and update it before returning a value. With fibers, we can automatically convert any internal iterator to an external one.
This doesn't have to do with fibers persay, but let me mention one more thing you can do with Enumerators: they allow you to apply higher-order Enumerable methods to other it...
Order a MySQL table by two columns
... MATCH (`text`) AGAINST (:string) AS `match`
FROM int_art_fulltext
WHERE MATCH (`text`) AGAINST (:string IN BOOLEAN MODE)
LIMIT 0,101
) t,
(
SELECT @row := 0
) r
ORDER BY `match` DESC
) k,
(
...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
....ClipData;
import android.content.ClipboardManager;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.net.Uri;
import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.DesignerProperty;
i...
How do I get a platform-dependent new line character?
... have been very nice of them to provide an overloaded method lineSeperator(int) which returns some number of line seperators, as I often find myself using 2 at once.
– Kon
Mar 11 '16 at 23:22
...
How to get RGB values from UIColor?
...= curView.backgroundColor;//line 2
CGColorRef colorRef = [color CGColor];
int _countComponents = CGColorGetNumberOfComponents(colorRef);
if (_countComponents == 4) {
const CGFloat *_components = CGColorGetComponents(colorRef);
CGFloat red = _components[0];
CGFloat green = _componen...