大约有 850 项符合查询结果（耗时：0.0327秒） [XML]
Rails 4: before_filter vs. before_action
... before_filter.
However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1
share
|
improve this answer
|
follow
|
...
Run a callback only if an attribute has changed in Rails
...e_to_<attribute>?
<attribute>_before_last_save
Rails <= 5.0
class Page < ActiveRecord::Base
before_save :do_something, if: :status_id_changed?
private
def do_something
# ...
end
end
This utilizes the fact that the before_save callback can conditionally execute ...
Using jQuery To Get Size of Viewport
...
I tested this on Windows IE6, IE8, FF3.6.3, Google Chrome 5.0.375.70, Opera 10.53, and Safari 5.0 (7533.16). This works consistently on all of these. I also tested FF3.6.3 on Ubuntu and it works there too. I think I'm using jQuery 1.3 with WordPress 2.9.2, which is where I needed th...
NSUserDefaults removeObjectForKey vs. setObject:nil
...
Swift 5.0 + iOS 11 and up
Both methods remove the value. Tried this in a playground:
import Foundation
let key = "Test"
let value = "test"
let defaults = UserDefaults.standard
func printUD() {
print("UserDefaults after modi...
Which MySQL data type to use for storing boolean values
...
For MySQL 5.0.3 and higher, you can use BIT. The manual says:
As of MySQL 5.0.3, the BIT data type is used to store bit-field
values. A type of BIT(M) enables storage of M-bit values. M can range
from 1 to 64.
Otherwise, according to...
Converting file size in bytes to human-readable string
...d(dp) + ' ' + units[u];
}
console.log(humanFileSize(5000, true)) // 5.0 kB
console.log(humanFileSize(5000, false)) // 4.9 KiB
console.log(humanFileSize(-10000000000000000000000000000)) // -8271.8 YiB
console.log(humanFileSize(999949, true)) // 999.9 kB
console.log(humanFileSize(999950,...
How to declare or mark a Java method as deprecated?
... both!
Quoting the java documentation on this subject:
Starting with J2SE 5.0, you deprecate a class, method, or field by using the @Deprecated annotation. Additionally, you can use the @deprecated Javadoc tag tell developers what to use instead.
Using the annotation causes the Java compiler to gen...
SQL Client for Mac OS X that works with MS SQL Server [closed]
...lso offers an MSSQL JDBC driver. Install sqljdbc4.jar (sqljdbc.jar for JRE 5.0) somewhere you keep Java packages (such as ~/Library/Java or /Library/Java/Extensions). Whichever driver you pick, make sure you add it to the "Extra Class Path" list for the MSSQL driver, then pick the class name for the...
Deciding between HttpClient and WebClient
...to the ASP.NET pipeline. Cleaner and modular code.
Reference
C# 5.0 Joseph Albahari
(Channel9 — Video Build 2013)
Five Great Reasons to Use the New HttpClient API to Connect to Web Services
WebClient vs HttpClient vs HttpWebRequest
...
How to get ID of the last updated row in MySQL?
...s that generate their own sequence values. As per dev.mysql.com/doc/refman/5.0/en/…
– brutuscat
Apr 21 '14 at 14:16
1
...