大约有 3,285 项符合查询结果（耗时：0.0261秒） [XML]
Timeout jQuery effects
...
setTimeout(function(){
e.dequeue();
}, 2000 );
});
e.fadeOut('fast');
});
or you could be really ingenious and make a jQuery function to do it.
(function($){
jQuery.fn.idle = function(time)
{
var o = $(this);
o.queue(function()
{
setTimeout(func...
In Python, what happens when you import inside of a function? [duplicate]
...e goo in the appropriate scope. The dict lookup and name binding are very fast operations.
Assuming the very first import gets totally amortized over the program's run anyway, having the "appropriate scope" be module-level means each use of goo.this, goo.that, etc, is two dict lookups -- one for g...
What is the most efficient way to loop through dataframes with pandas? [duplicate]
...ndex, row in df.iterrows():
# do some logic here
Or, if you want it faster use itertuples()
But, unutbu's suggestion to use numpy functions to avoid iterating over rows will produce the fastest code.
share
...
In Matlab, when is it optimal to use bsxfun?
...here are three reasons I use bsxfun (documentation, blog link)
bsxfun is faster than repmat (see below)
bsxfun requires less typing
Using bsxfun, like using accumarray, makes me feel good about my understanding of Matlab.
bsxfun will replicate the input arrays along their "singleton dimensions",...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...配的速度,会把一些小的(不大于64B) chunk先放到一个叫做 fast bins 的容器内。
在fast bins和bins都不能满足需求后，ptmalloc会设法在一个叫做top chunk的空间分配内存。 对于非主分配区会预先通过mmap分配一大块内存作为top chunk， 当bin...
looping through an NSMutableDictionary
...
For simple loop, fast enumeration is a bit faster than block-based loop
It's easier to do concurrent or reverse enumeration with block-based enumeration than with fast enumeration
When looping with NSDictionary you can get key and value in o...
Why does Java's hashCode() in String use 31 as a multiplier?
...our multiplier is slow this is still a win. Modern processors tend to have fast multipliers so it doesn't make much difference, so long as 32 goes on the correct side.
It's not a great hash algorithm, but it's good enough and better than the 1.0 code (and very much better than the 1.0 spec!).
...
If strings are immutable in .NET, then why does Substring take O(n) time?
...ozen. String allocation and memory copying of fifty bytes is astonishingly fast on modern hardware. That making a new data structure that consists of a pointer to the middle of an existing string plus a length is also astonishingly fast is irrelevant; "fast enough" is by definition fast enough.
The...
How to delete a row by reference in data.table?
...nters, as you know. The plan is to do something similar for rows and allow fast insert and delete. A row delete would use memmove in C to budge up the items (in each and every column) after the deleted rows. Deleting a row in the middle of the table would still be quite inefficient compared to a row...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ke III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular impl...