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When is it appropriate to use UDP instead of TCP? [closed]
...rantees packet delivery and thus can be considered "reliable", whereas UDP doesn't guarantee anything and packets can be lost. What would be the advantage of transmitting data using UDP in an application rather than over a TCP stream? In what kind of situations would UDP be the better choice, and wh...
What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...sitive comparisons so 'ABC' would equal 'abc'
AS accent sensitive, so 'ü' does not equal 'u'
P.S. For more detailed information be sure to read @solomon-rutzky's answer.
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C# : 'is' keyword and checking for Not
...to go (there's no IsNot operator).
You can build an extension method that does it:
public static bool IsA<T>(this object obj) {
return obj is T;
}
and then use it to:
if (!child.IsA<IContainer>())
And you could follow on your theme:
public static bool IsNotAFreaking<T>(...
How can I add numbers in a Bash script?
...um2` # Whitespace for expr is important
For floating point:
Bash doesn't directly support this, but there are a couple of external tools you can use:
num=$(awk "BEGIN {print $num1+$num2; exit}")
num=$(python -c "print $num1+$num2")
num=$(perl -e "print $num1+$num2")
num=$(echo $num1 + $nu...
How to read from standard input in the console?
...the input to. Try replacing fmt.Scanln(text2) with fmt.Scanln(&text2). Don't use Sscanln, because it parses a string already in memory instead of from stdin. If you want to do something like what you were trying to do, replace it with fmt.Scanf("%s", &ln)
If this still doesn't work, your cu...
STL or Qt containers?
...which is extremely useful when it comes to using Qt's foreach macro
(which does a copy) and when using meta-types or signals and slots.
can use STL-style iterators or Java-style iterators
are streamable with QDataStream
are used extensively in Qt's API
have a stable implementation across operating s...
Using regular expressions to parse HTML: why not?
...mann pointed out, regular languages are also context-free, so context-free doesn't necessarily mean not regular). The only thing you can do with regexps on HTML is heuristics but that will not work on every condition. It should be possible to present a HTML file that will be matched wrongly by any r...
How do you append to an already existing string?
...
In classic sh, you have to do something like:
s=test1
s="${s}test2"
(there are lots of variations on that theme, like s="$s""test2")
In bash, you can use +=:
s=test1
s+=test2
...
Can I “multiply” a string (in C#)?
...
In .NET 4 you can do this:
String.Concat(Enumerable.Repeat("Hello", 4))
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Getting a list of associative array keys
...
var dictionary = {
"cats": [1, 2, 37, 38, 40, 32, 33, 35, 39, 36],
"dogs": [4, 5, 6, 3, 2]
};
// Get the keys
var keys = Object.keys(dictionary);
console.log(keys);
See reference below for browser support. It is supported in Firefox 4.20, Chrome 5, and Internet Explorer 9. Object.ke...