大约有 43,000 项符合查询结果（耗时：0.0187秒） [XML]
Check if table exists in SQL Server
...always best to use an INFORMATION_SCHEMA view. These views are (mostly) standard across many different databases and rarely change from version to version.
To check if a table exists use:
IF (EXISTS (SELECT *
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = ...
Split a collection into `n` parts with LINQ?
...
A pure linq and the simplest solution is as shown below.
static class LinqExtensions
{
public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> list, int parts)
{
int i = 0;
...
Make xargs handle filenames that contain spaces
My command fails because the file "Lemon Tree.mp3" contains spaces and so xargs thinks it's two files. Can I make find + xargs work with filenames like this?
...
Determine if 2 lists have the same elements, regardless of order? [duplicate]
...
You can simply check whether the multisets with the elements of x and y are equal:
import collections
collections.Counter(x) == collections.Counter(y)
This requires the elements to be hashable; runtime will be in O(n), where n is the size of the lists.
If the elements are also unique, y...
User recognition without cookies or local storage
I'm building an analytic tool and I can currently get the user's IP address, browser and operating system from their user agent.
...
What do 'lazy' and 'greedy' mean in the context of regular expressions?
Could someone explain these two terms in an understandable way?
12 Answers
12
...
How to remove new line characters from a string?
... This was definitely the best solution for me. A smooth blend of this C# and javascript was all I needed to resolve my issue.
– Joe Brunscheon
Nov 26 '13 at 19:30
...
Generating a SHA-256 hash from the Linux command line
...
On OSX, it might be handy to create an alias: alias sha256sum='shasum --algorithm 256'
– Jonathan Cross
Jun 4 '16 at 13:21
1
...
Multiple cases in switch statement
...ld use some if's (or a table lookup) to reduce the input to a set of enums and switch on the enum.
– Harvey
Jul 28 '13 at 20:00
5
...
from list of integers, get number closest to a given value
...s O(log n) time (note however checking if a list is already sorted is O(n) and sorting is O(n log n).)
share
|
improve this answer
|
follow
|
...