大约有 26,000 项符合查询结果（耗时：0.0480秒） [XML]
setTimeout in for-loop does not print consecutive values [duplicate]
...have to arrange for a distinct copy of "i" to be present for each of the timeout functions.
function doSetTimeout(i) {
setTimeout(function() { alert(i); }, 100);
}
for (var i = 1; i <= 2; ++i)
doSetTimeout(i);
If you don't do something like this (and there are other variations on this sam...
How can I profile C++ code running on Linux?
...there's a simple way to find performance problems.
Just halt it several times, and each time look at the call stack. If there is some code that is wasting some percentage of the time, 20% or 50% or whatever, that is the probability that you will catch it in the act on each sample. So, that is rough...
Getting visitors country from their IP
...['HTTP_CLIENT_IP'];
}
}
$purpose = str_replace(array("name", "\n", "\t", " ", "-", "_"), NULL, strtolower(trim($purpose)));
$support = array("country", "countrycode", "state", "region", "city", "location", "address");
$continents = array(
"AF" => "Africa",
...
Multiline strings in JSON
I'm writing some data files in JSON format and would like to have some really long string values split over multiple lines. Using python's JSON module I get a whole lot of errors, whether I use \ or \n as an escape.
...
Entity Framework: table without primary key
...
The error means exactly what it says.
Even if you could work around this, trust me, you don't want to. The number of confusing bugs that could be introduced is staggering and scary, not to mention the fact that your performance wil...
Calling a base class's classmethod in Python
...
This is how you would invoke the code in the base class's version of the method (i.e. print cls, a), from the derived class, with cls being set to the derived class.
share
|
improve this answer
...
LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
Consider the IEnumerable extension methods SingleOrDefault() and FirstOrDefault()
15 Answers
...
Clang vs GCC for my Linux Development project
...e gap is closing.
Original:
For students, I would unconditionally recommend Clang.
The performance in terms of generated code between gcc and Clang is now unclear (though I think that gcc 4.7 still has the lead, I haven't seen conclusive benchmarks yet), but for students to learn it does not re...
Why is using the JavaScript eval function a bad idea?
...ity to compile/cache eval'd code)
Edit: As @Jeff Walden points out in comments, #3 is less true today than it was in 2008. However, while some caching of compiled scripts may happen this will only be limited to scripts that are eval'd repeated with no modification. A more likely scenario is that y...
jquery input select all on focus
... of focus. It seems to work for both mouse and key events (at least on Chrome/Mac):
jQuery < version 1.7:
$("input[type='text']").click(function () {
$(this).select();
});
jQuery version 1.7+:
$("input[type='text']").on("click", function () {
$(this).select();
});
Here is a demo
...