大约有 36,000 项符合查询结果（耗时：0.0490秒） [XML]
Unique (non-repeating) random numbers in O(1)?
I'd like to generate unique random numbers between 0 and 1000 that never repeat (i.e. 6 doesn't show up twice), but that doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
...
What does .SD stand for in data.table in R
...
206
.SD stands for something like "Subset of Data.table". There's no significance to the initial "....
Fluid width with equally spaced DIVs
...*display:inline; zoom:1 fixes inline-block for IE6/7, see here.
font-size: 0; line-height: 0 fixes a minor issue in IE6.
#container {
border: 2px dashed #444;
height: 125px;
text-align: justify;
-ms-text-justify: distribute-all-lines;
text-justify: distribute-all-lines;
/* ju...
How to get hex color value rather than RGB value?
...
var hexDigits = new Array
("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
//Function to convert rgb color to hex format
function rgb2hex(rgb) {
rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
return "#" + hex(rgb[1]) + hex(rg...
How to drop into REPL (Read, Eval, Print, Loop) from Python code
...
105
You could try using the interactive option for python:
python -i program.py
This will execut...
How do I browse an old revision of a Subversion repository through the web view?
...Bert Huijben's comment:
If your repository is hosted using Subversion 1.6.0 or later, you can
use example.com/svnrepository/?p=3 for the same result... This method
/is/ documented. (?r= revision of the file, ?p= operational revision
of the URL). See the subversion 1.6 release notes
...
What is the point of Lookup?
... (Type type in lookup["System"])
{
Console.WriteLine("{0}: {1}",
type.FullName, type.Assembly.GetName().Name);
}
}
}
(I'd normally use var for most of these declarations, in normal code.)
...
AngularJS ng-if with multiple conditions
... |
edited Nov 8 '19 at 15:09
Edric
15.5k99 gold badges5656 silver badges7171 bronze badges
answered Nov ...
Difference between objectForKey and valueForKey?
...
404
objectForKey: is an NSDictionary method. An NSDictionary is a collection class similar to an NS...
Transitions with GStreamer Editing Services freezes, but works OK without transitions
...
0
Active
Oldest
Votes
...