大约有 40,000 项符合查询结果（耗时：0.0276秒） [XML]
Replace duplicate spaces with a single space in T-SQL
...ll the double spaces, no need to put in multiple replaces. This is the set-based solution.
share
|
improve this answer
|
follow
|
...
MySQL with Node.js
...me from a PHP background, so I'm fairly used to using MySQL for all my database needs.
9 Answers
...
How do you diff a directory for only files of a specific type?
...=PATTERN' option. This option ignores any files
or subdirectories whose base names match the shell pattern PATTERN.
Unlike in the shell, a period at the start of the base of a file name
matches a wildcard at the start of a pattern. You should enclose
PATTERN in quotes so that the shell doe...
SQL Query to concatenate column values from multiple rows in Oracle
...ow url for more information about string concatenation.
http://www.oracle-base.com/articles/misc/StringAggregationTechniques.php
String Concatenation
share
|
improve this answer
|
...
Creating java date object from year,month,day
...
Months are zero-based in Calendar. So 12 is interpreted as december + 1 month. Use
c.set(year, month - 1, day, 0, 0);
share
|
improve ...
Get spinner selected items text?
... the actual text. I got a string representing a cursor object: android.database.sqlite.SQLiteCursor@410dfae8probably because I used a cursor adapter. Any idea what I should do to get the right string?
– AdamMc331
Nov 27 '14 at 19:21
...
What are the best practices for using a GUID as a primary key, specifically regarding performance?
...rsonally seen massive performance gains when breaking up the previous GUID-based Primary / Clustered Key into two separate key - the primary (logical) key on the GUID, and the clustering (ordering) key on a separate INT IDENTITY(1,1) column.
As Kimberly Tripp - the Queen of Indexing - and others h...
Why can't I inherit static classes?
...
Other opinions from channel9
Inheritance in .NET works only on instance base. Static methods are defined on the type level not on the instance level. That is why overriding doesn't work with static methods/properties/events...
Static methods are only held once in memory. There is no virtual table...
Rails filtering array of objects by attribute value
...ts
This will be array of attachment objects
Use select method to filter based on file_type.
@logos = @attachments.select { |attachment| attachment.file_type == 'logo' }
@images = @attachments.select { |attachment| attachment.file_type == 'image' }
This will not trigger any db query.
...
How to call shell commands from Ruby
...
This explanation is based on a commented Ruby script from a friend of mine. If you want to improve the script, feel free to update it at the link.
First, note that when Ruby calls out to a shell, it typically calls /bin/sh, not Bash. Some Bash ...