大约有 40,000 项符合查询结果（耗时：0.0605秒） [XML]
CSS disable text selection
...
You could also disable user select on all elements:
* {
-webkit-touch-callout:none;
-webkit-user-select:none;
-moz-user-select:none;
-ms-user-select:none;
user-select:none;
}
And than enable it on the elements you do want the user to be abl...
Magic number in boost::hash_combine
The boost::hash_combine template function takes a reference to a hash (called seed ) and an object v . According to the docs , it combines seed with the hash of v by
...
Java generics type erasure: when and what happens?
...tring>. But objects don't just appear from nowhere. They are created locally, passed in as a method invocation argument, returned as the return value from a method call, or read from a field of some object... In all these cases you CAN know at runtime what the generic type is, either implicitly ...
Does MySQL ignore null values on unique constraints?
...
Yes, MySQL allows multiple NULLs in a column with a unique constraint.
CREATE TABLE table1 (x INT NULL UNIQUE);
INSERT table1 VALUES (1);
INSERT table1 VALUES (1); -- Duplicate entry '1' for key 'x'
INSERT table1 VALUES (NULL);
INSER...
Get selected option from select element
...ted elements use
$("select option:selected").length
To Get the value of all selected elements use
var str = "";
$("select option:selected").each(function () {
str += $(this).text() + " ";
});
share
...
JavaScript validation for empty input field
I have this input field
<input name="question"/> I want to call IsEmpty function when submit clicking submit button.
...
Adding a directory to the PATH environment variable in Windows
...
Hmm, no, it truly really only modifies the registry. Ought to be a bit obvious from doing this in a Control Panel dialog instead of, say, the command prompt with the PATH command. You can observe what it does easily with SysInternals' Process ...
Unable to load DLL 'SQLite.Interop.dll'
Periodically I am getting the following exception:
41 Answers
41
...
Does “untyped” also mean “dynamically typed” in the academic CS world?
...theory". Programming language theory is based on these foundations. And in all these mathematical contexts, "type" has a particular, well-established meaning.
The terminology "dynamic typing" was invented much later -- and it is a contradiction in terms in the face of the common mathematical use of...
Long-held, incorrect programming assumptions [closed]
...
For a long time I assumed that everyone else had this super-mastery of all programming concepts (design patterns, the latest new language, computational complexity, lambda expressions, you name it).
Reading blogs, Stack Overflow and programming books always seemed to make me feel that I was beh...