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Regular expression for a string that does not start with a sequence
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@Gumbo - should that not end .* instead of .+? A string that is tbd_ also starts with that... therefore by definition doesn't need to be followed by any other characters? Otherwise, good example. It does require a regex engine that supports lookaround though.
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When do we need curly braces around shell variables?
...er, the {} in ${} are useful if you want to expand the variable foo in the string
"${foo}bar"
since "$foobar" would instead expand the variable identified by foobar.
Curly braces are also unconditionally required when:
expanding array elements, as in ${array[42]}
using parameter expansion oper...
How To Change DataType of a DataColumn in a DataTable?
... Love the solution - Elegant! However ImportRow() does not seem to convert string values to float values for me. Am I missing something here?
– yangli.liy
Sep 17 '14 at 15:54
2
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Constructor in an Interface?
...at calls each of these constructors.
Or in code:
interface Named { Named(String name); }
interface HasList { HasList(List list); }
class A implements Named, HasList {
/** implements Named constructor.
* This constructor should not be used from outside,
* because List parameter is missin...
How can I append a string to an existing field in MySQL?
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You need to use the CONCAT() function in MySQL for string concatenation:
UPDATE categories SET code = CONCAT(code, '_standard') WHERE id = 1;
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How can I convert this foreach code to Parallel.ForEach?
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string[] lines = File.ReadAllLines(txtProxyListPath.Text);
List<string> list_lines = new List<string>(lines);
Parallel.ForEach(list_lines, line =>
{
//Your stuff
});
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Regex - Does not contain certain Characters
...character class ([^) means match anything but, so this means, beginning of string, then one or more of anything except < and >, then the end of the string.
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Is there a pattern for initializing objects created via a DI container
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Thus, the interface should simply be:
public interface IMyIntf
{
string RunTimeParam { get; }
}
Now define the Abstract Factory:
public interface IMyIntfFactory
{
IMyIntf Create(string runTimeParam);
}
You can now create a concrete implementation of IMyIntfFactory that creates con...
Write a program that will surely go into deadlock [closed]
...n("Thread finished");
}
}
}
public static void main(String[] args) {
final Object obj1 = new Object();
final Object obj2 = new Object();
final CountDownLatch latch = new CountDownLatch(2);
new Locker(obj1, obj2, latch).start();
new Locker(obj2, o...
How to count the number of occurrences of an element in a List
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In Java 8:
Map<String, Long> counts =
list.stream().collect(Collectors.groupingBy(e -> e, Collectors.counting()));
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