大约有 47,000 项符合查询结果（耗时：0.0598秒） [XML]
Declare a constant array
...
247
An array isn't immutable by nature; you can't make it constant.
The nearest you can get is:
...
How to show current year in view?
...
249
<%= Time.current.year %>
http://pleac.sourceforge.net/pleac_ruby/datesandtimes.html
...
How do I check if a string is valid JSON in Python?
...
245
You can try to do json.loads(), which will throw a ValueError if the string you pass can't be ...
How can I list (ls) the 5 last modified files in a directory?
...
252
Try using head or tail. If you want the 5 most-recently modified files:
ls -1t | head -5
Th...
How do I delete a fixed number of rows with sorting in PostgreSQL?
...
|
answered Mar 2 '11 at 18:01
community wiki
...
In Jinja2, how do you test if a variable is undefined?
...
From the Jinja2 template designer documentation:
{% if variable is defined %}
value of variable: {{ variable }}
{% else %}
variable is not defined
{% endif %}
...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
...
124
The Easy Way
If you're a typical developer, you can install the easy way, using instructions a...
How to prevent browser page caching in Rails
Ubuntu -> Apache -> Phusion Passenger -> Rails 2.3
6 Answers
6
...
Uses of content-disposition in an HTTP response header
...
Note that RFC 6266 supersedes the RFCs referenced below. Section 7 outlines some of the related security concerns.
The authority on the content-disposition header is RFC 1806 and RFC 2183. People have also devised content-disposition hacki...
jQuery posting JSON
...
223
'data' should be a stringified JavaScript object:
data: JSON.stringify({ "userName": userName...