大约有 46,000 项符合查询结果（耗时：0.0466秒） [XML]
“Variable” variables in Javascript?
I know it's possible in PHP to have "variable" variables. For example
7 Answers
7
...
How can I use getSystemService in a non-activity class (LocationManager)?
I'm having trouble offloading tasks from the main Activities OnCreate method onto another class to do the heavy lifting.
5 ...
Create an array with same element repeated multiple times
...
You can do it like this:
function fillArray(value, len) {
if (len == 0) return [];
var a = [value];
while (a.length * 2 <= len) a = a.concat(a);
if (a.length < len) a = a.concat(a.slice(0, len - a.length));
return a;
}
...
range over interface{} which stores a slice
...n the scenario where you have a function which accepts t interface{} . If it is determined that the t is a slice, how do I range over that slice?
...
Converting datetime.date to UTC timestamp in Python
I am dealing with dates in Python and I need to convert them to UTC timestamps to be used
inside Javascript. The following code does not work:
...
How do I get the entity that represents the current user in Symfony2?
I am using the Symfony security setup. Everything works fine, but I don't know how to do one important thing:
6 Answers
...
How do I remove  from the beginning of a file?
I have a CSS file that looks fine when I open it using gedit , but when it's read by PHP (to merge all the CSS files into one), this CSS has the following characters prepended to it: 
...
How do I add a path to PYTHONPATH in virtualenv
...
You can usually avoid having to do anything with PYTHONPATH by using .pth files. Just put a file with a .pth extension (any basename works) in your virtualenv's site-packages folder, e.g. lib\python2.7\site-packages, with the absolute path to the directory containing yo...
What does numpy.random.seed(0) do?
What does np.random.seed do in the below code from a Scikit-Learn tutorial? I'm not very familiar with NumPy's random state generator stuff, so I'd really appreciate a layman's terms explanation of this.
...
Fastest Way to Find Distance Between Two Lat/Long Points
I currently have just under a million locations in a mysql database all with longitude and latitude information.
15 Answers...