大约有 31,100 项符合查询结果（耗时：0.0511秒） [XML]
How to get all subsets of a set? (powerset)
...tatement to range(1, len(s)+1) to avoid a 0-length combination", except in my case you change for i in range(1 << x) to for i in range(1, 1 << x).
Returning to this years later, I'd now write it like this:
def powerset(s):
x = len(s)
masks = [1 << i for i in range(x)]
...
What are the most common SQL anti-patterns? [closed]
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My favorite is when people embed HTML AND javascript, e.g. SELECT '<a href=... onclick="">' + name ' </a>'
– Matt Rogish
Jan 14 '09 at 17:19
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Difference between char* and const char*?
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char mystring[101] = "My sample string";
const char * constcharp = mystring; // (1)
char const * charconstp = mystring; // (2) the same as (1)
char * const charpconst = mystring; // (3)
constcharp++; // ok
charconstp++; // ok
cha...
Can comments be used in JSON?
...N that can be parsed. So, you might use it like:
JSON.parse(JSON.minify(my_str));
When I released it, I got a huge backlash of people disagreeing with even the idea of it, so I decided that I'd write a comprehensive blog post on why comments make sense in JSON. It includes this notable comment ...
Can jQuery provide the tag name?
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To whom it may concern: if you downvote my answer, please tell me why so I can improve it and learn for future SO-answers. Thanks.
– middus
Feb 13 '11 at 21:25
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Render HTML to an image
...e is how you use it (some more here):
var node = document.getElementById('my-node');
domtoimage.toPng(node)
.then (function (dataUrl) {
var img = new Image();
img.src = dataUrl;
document.appendChild(img);
})
.catch(function (error) {
console.error('oops,...
UIView with rounded corners and drop shadow?
...mework to your project and:
#import <QuartzCore/QuartzCore.h>
See my other answer regarding masksToBounds.
Note
This may not work in all cases. If you find that this method interferes with other drawing operations that you are performing, please see this answer.
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How to use ? : if statements with Razor and inline code blocks
I'm updating my old .aspx views with the new Razore view engine. I have a bunch of places where I have code like this:
4 An...
What are the best practices for JavaScript error handling?
I'm looking to start making my JavaScript a bit more error proof, and I'm finding plenty of documentation on using try , catch , finally , and throw , but I'm not finding a ton of advice from experts on when and where to throw errors.
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Using Ajax.BeginForm with ASP.NET MVC 3 Razor
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Example:
Model:
public class MyViewModel
{
[Required]
public string Foo { get; set; }
}
Controller:
public class HomeController : Controller
{
public ActionResult Index()
{
return View(new MyViewModel());
}
[HttpPost]
...