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Do sealed classes really offer performance Benefits?
I have come across a lot of optimization tips which say that you should mark your classes as sealed to get extra performance benefits.
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How do you input commandline argument in IntelliJ IDEA?
When I input commandline arguments,
In Eclipse, using with run configuration. But I don't Know How do i input commandline arguments in IntelliJ IDEA.
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What is the source code of the “this” module doing?
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And that can actually be implemented more simply in both 2.x and 3.x as import codecs; print(codecs.decode(s, "rot-13")). Writing the algorithm out by hand like that was just further obfuscation of the easter egg.
– ncoghlan
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Detecting value change of input[type=text] in jQuery
I want to execute a function every time the value of a specific input box changes. It almost works with $('input').keyup(function) , but nothing happens when pasting text into the box, for example. $input.change(function) only triggers when the input is blurred, so how would I immediately know ...
Why does `True == False is False` evaluate to False? [duplicate]
I get some rather unexpected behavior on an expression that works with == but not with is :
4 Answers
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Select distinct using linq [duplicate]
...test.id)
.Select(grp => grp.First());
Edit: as getting this IEnumerable<> into a List<> seems to be a mystery to many people, you can simply write:
var result = myList.GroupBy(test => test.id)
.Select(grp => grp.First())
.ToList();
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Convert array to JSON
...the array, but I now need to send this array to a page via jQuery's .get method. How can I convert it to a JSON object for sending?
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how to remove the dotted line around the clicked a element in html
...new page,then when user click it,there will be a dotted line around the element,it will only disappear when user click anything else in the page,how to remove this?
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How do I include negative decimal numbers in this regular expression?
...ld add an optional hyphen at the beginning by adding -? (? is a quantifier meaning one or zero occurrences):
^-?[0-9]\d*(\.\d+)?$
I verified it in Rubular with these values:
10.00
-10.00
and both matched as expected.
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Change the name of a key in dictionary
...d May 15 '16 at 20:36
Robert Siemer
24k77 gold badges6767 silver badges8282 bronze badges
answered Dec 10 '10 at 7:11
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