大约有 47,000 项符合查询结果（耗时：0.0734秒） [XML]
PHP substring extraction. Get the string before the first '/' or the whole string
...
262
Use explode()
$arr = explode("/", $string, 2);
$first = $arr[0];
In this case, I'm using th...
Fast way to get image dimensions (not filesize)
...more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obviously reads the images as a whole first.
...
How can I disable logging of asset pipeline (sprockets) messages in Ruby on Rails 3.1?
...
382
Place the following code in config/initializers/quiet_assets.rb
if Rails.env.development?
Rai...
Python Sets vs Lists
...
236
It depends on what you are intending to do with it.
Sets are significantly faster when it com...
What do (lambda) function closures capture?
...e a new scope each time you create the lambda:
>>> adders = [0,1,2,3]
>>> for i in [0,1,2,3]:
... adders[i] = (lambda b: lambda a: b + a)(i)
...
>>> adders[1](3)
4
>>> adders[2](3)
5
The scope here is created using a new function (a lambda, for brevity...
What regular expression will match valid international phone numbers?
...
23 Answers
23
Active
...
How to make a chain of function decorators?
...
2951
Check out the documentation to see how decorators work. Here is what you asked for:
from fun...
Group by with multiple columns using lambda
...
258
var query = source.GroupBy(x => new { x.Column1, x.Column2 });
...
How to get number of entries in a Lua table?
...
132
You already have the solution in the question -- the only way is to iterate the whole table with...
Version number comparison in Python
... then compare the lists of numbers.
import re
def mycmp(version1, version2):
def normalize(v):
return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
return cmp(normalize(version1), normalize(version2))
This is the same approach as Pär Wieslander, but a bit more compact:
...