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Help with C# generics error - “The type 'T' must be a non-nullable value type”
...ou aren't constraining the type of T, so it could end up being Nullable<Form>, which is obviously invalid.
You need to change the constraint to where T : struct, IComparable to ensure that T can only be a value type.
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convert from Color to brush
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@raiserle: For your information, the question content used to be I want to convert from Brush to Color in c# while the title was the other way around.
– H.B.
Jan 4 '18 at 19:36
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Load HTML file into WebView
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You could presumably also load it form a String if you're very adverse to using assets...(see stackoverflow.com/questions/4543349/load-local-html-in-webview)
– Joe
Apr 21 '11 at 21:36
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Disable messages upon loading a package
...(C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-pc-linux-gnu (64-bit)
[...]
R> suppressMessages(library(ROCR))
R> # silently loaded
R> search()
[1] ".GlobalEnv" "package:ROCR" # it's rea...
Is there a reason for C#'s reuse of the variable in a foreach?
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8.8.4 The foreach statement
(...)
A foreach statement of the form
foreach (V v in x) embedded-statement
is then expanded to:
{
E e = ((C)(x)).GetEnumerator();
try {
while (e.MoveNext()) {
V v = (V)(T)e.Current;
embedded-statement
}
}
fina...
How do I get java logging output to appear on a single line?
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As of Java 7, java.util.logging.SimpleFormatter supports getting its format from a system property, so adding something like this to the JVM command line will cause it to print on one line:
-Djava.util.logging.SimpleFormatter.format='%1$tY-%1$tm-%1$td %1$tH:%1$t...
How to round a number to n decimal places in Java
...ode explicitly to handle your issue with the half-even round, then use the format pattern for your required output.
Example:
DecimalFormat df = new DecimalFormat("#.####");
df.setRoundingMode(RoundingMode.CEILING);
for (Number n : Arrays.asList(12, 123.12345, 0.23, 0.1, 2341234.212431324)) {
D...
What is the !! (not not) operator in JavaScript?
I saw some code that seems to use an operator I don't recognize, in the form of two exclamation points, like so: !! . Can someone please tell me what this operator does?
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C#: Looping through lines of multiline string
...l etc :) Having said that, if you do want to do a manual loop, this is the form that I typically prefer over Fredrik's:
using (StringReader reader = new StringReader(input))
{
string line;
while ((line = reader.ReadLine()) != null)
{
// Do something with the line
}
}
This ...
List comprehension: Returning two (or more) items for each item
...cause it does not require recreating the list on every + (thus has O(N) performance rather than O(N^2) performance). I'll still use sum(..., []) when I want a quick one-liner or I'm in a hurry, or when the number of terms being combined is bounded (e.g. <= 10).
– ninjagecko
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