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Can someone explain this 'double negative' trick? [duplicate]
...eturn true.
The "falsey" values are:
false
NaN
undefined
null
"" (empty string)
0
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C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?
...following types: bool, byte, char, double, float, int, long, sbyte, short, string, uint, ulong, ushort.
The type object.
The type System.Type.
An enum type.
(provided it has public accessibility and the types in which it is nested (if any) also have public accessibility)
Single-dimensional...
Is it possible to remove inline styles with jQuery?
...quote from the docs:
Setting the value of a style property to an empty string — e.g. $('#mydiv').css('color', '') — removes that property from an element if it has already been directly applied, whether in the HTML style attribute, through jQuery's .css() method, or through direct DOM manipu...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...nentContainer container;
private Context context;
private static final String LOG_TAG = "CB";
private boolean suppressToast;
public Clipboard(ComponentContainer container) {
super(container.$form());
this.container = container;
context = (Context) container.$context();
Log....
Searching for UUIDs in text with regex
...Microsoft's Globally Unique Identifiers (GUIDs), there are five equivalent string representations for a GUID:
"ca761232ed4211cebacd00aa0057b223"
"CA761232-ED42-11CE-BACD-00AA0057B223"
"{CA761232-ED42-11CE-BACD-00AA0057B223}"
"(CA761232-ED42-11CE-BACD-00AA0057B223)"
"{0xCA761232, 0xED42, 0x1...
How to tell if a file is git tracked (by shell exit code)?
...in a script, for example PowerShell:
$gitResult = (git ls-files $_) | out-string
if ($gitResult.length -ne 0)
{
## do stuff with the tracked file
}
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Begin, Rescue and Ensure in Ruby?
...y-style resource blocks yourself:
class File
{
static T open<T>(string filename, string mode, Func<File, T> block)
{
var handle = new File(filename, mode);
try
{
return block(handle);
}
finally
{
handle.Disp...
How to remove all event handlers from an event
...s working code:
public static void ClearEventInvocations(this object obj, string eventName)
{
var fi = obj.GetType().GetEventField(eventName);
if (fi == null) return;
fi.SetValue(obj, null);
}
private static FieldInfo GetEventField(this Type type, string eventName)
{
FieldInfo fiel...
Comparison of C++ unit test frameworks [closed]
...));
}
THEORY("Foo should return the same value it was given, converted to string", (int input, std::string expected),
std::make_tuple(0, "0"),
std::make_tuple(1, "1"),
std::make_tuple(2, "2"))
{
Assert.Equal(expected, Foo(input));
}
Main features:
Incredibly fast: tests run conc...
When is an interface with a default method initialized?
...{
int k = Test.out("k", 5);
}
class Test {
public static void main(String[] args) {
System.out.println(J.i);
System.out.println(K.j);
}
static int out(String s, int i) {
System.out.println(s + "=" + i);
return i;
}
}
Its expected output is:
1
j=...